Document and Entity Information Statement [Table] Statement [Line Items] Statement Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets Cash Cash-end of year Cash-beginning of year Cash Cash Accounts Receivable, Net, Current Total trade accounts receivable, net Trade accounts receivable, net of allowance for doubtful accounts of RMB nil and RMB nil ($ nil), as of December 31, 2017 and 2018, respectively (note 4) Inventory, Net Inventories (note 5) Total inventories Advances on Inventory Purchases Advance to suppliers (note 6) Total Advance to suppliers Nontrade Receivables, Current Other receivables (note 7) Total other receivables Prepaid Expense, Current Prepaid expenses Assets, Current Total current assets Property, Plant and Equipment, Net. Property, plant and equipment, net (note 8) Total property, plant, and equipment, net Represents carrying value of the rights to use the land in respect of properties. Land Use Rights, Net Land use rights, net (note 9) Assets Identifiable assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities Accounts Payable, Trade, Current Trade accounts payable Amount of obligations incurred and payable, pertaining to costs that are statutory in nature, incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Excluding accrued income taxes. Also includes the aggregate carrying amount of liabilities not separately disclosed. Accrued Expenses and Other Current Liabilities Accrued expenses and other payables (note 10) Total accrued expenses and other payables Accrued expenses and other payables Accrued Income Taxes, Current Income taxes payable Short-term Debt Short-term borrowings (note 11) Short-term borrowings Represents the amount of bonds payable due within one year or the operating cycle if longer. Bonds Payable Current Bonds payable - current portion Bonds payable-Outstanding principal current Liabilities, Current Total current liabilities Represents the amount of bonds payable including accumulated accrued interests element due after one year or beyond the normal operating cycle, if longer. Bonds Payable Noncurrent. Bonds payable, outstanding principal amount of RMB300,000,000 ($43,615,301), bearing fixed annual interest rate of 6.5%, with maturity on November 2, 2021 (less unamortized debt issuance costs based on imputed interest rate of 6.75% of RMB 5,419,012 and RMB 4,005,357 ($582,316) as of December 31, 2017 and 2018, respectively) (note 12) Bonds payable-Outstanding principal non current Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies (note 15) Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity Common Stock, Value, Issued Ordinary share-par value of RMB0.0068259; 25,725,000 shares authorized, issued and outstanding as of December 31, 2017 and 2018, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings, Appropriated Retained earnings-appropriated (note 2) Retained Earnings, Unappropriated Retained earnings-unappropriated Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' Equity Attributable to Parent Ending Balance Beginning Balance Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Allowance for Doubtful Accounts Receivable, Current Trade accounts receivable, allowance for doubtful accounts Less: Allowance for doubtful accounts Debt Instrument, Face Amount Debt instrument, face amount Debt Instrument, Interest Rate, Stated Percentage Interest rate (as a percent) Debt instrument, fixed interest rate (as a percent) Percentage of imputed interest rate for unamortized debt issuance costs. Debt Instrument, Unamortized Debt Issuance Costs, Imputed Interest Rate Unamortized debt issuance costs interest rate (as a percentage) Debt Issuance Costs, Net Outstanding deferred expenses Debt issuance costs Common Stock, Par or Stated Value Per Share Ordinary share, par value (in CNY per share) Common Stock, Shares Authorized Ordinary share, shares authorized Common Stock, Shares, Issued Ending Balance (in shares) Beginning Balance (in shares) Ordinary share, shares issued Common Stock, Shares, Outstanding Ordinary share, shares outstanding CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME Revenues Revenues Net sales Cost of Revenue Cost of goods sold Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses (income), net: Operating expenses: Selling Expense Selling General and Administrative Expense General and administrative General and administrative Represents the amount of government subsidy received by the entity. Government Subsidy Government subsidy Government subsidy Other Operating Income (Expense), Net Others, net Impairment of Long-Lived Assets Held-for-use Impairment losses of property, plant and equipment Impairment loss Impairment loss of property, plant and equipment Operating Expenses Total operating expenses(income), net Operating Income (Loss) Loss from operations Income from operations Investment Income, Interest Interest income Interest Expense. Interest expense Interest expense Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income (loss) before income tax expenses Profit (loss) before tax Income Tax Expense (Benefit), Continuing Operations [Abstract] Income tax (credit) expenses (note 14) Current Income Tax Expense (Benefit) Current Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Income Tax Expense (Benefit) Income tax expense Income tax expense Income tax expenses Net Income (Loss) Attributable to Parent Net income (loss) for the year Net income/(loss) Net income (loss) attributable to ordinary shareholders Net income/(loss), representing undistributed earnings available to ordinary shareholder-basic and diluted Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustment Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income attributable to ordinary shareholders Earnings Per Share, Basic and Diluted [Abstract] Earnings (loss) per share (note 2): Earnings Per Share, Basic and Diluted Basic and diluted (in dollars per share) Basic and Diluted (in CNY or dollars per share) Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Weighted average ordinary shares outstanding (note 2): Weighted Average Number of Shares Outstanding, Basic and Diluted Basic and diluted (in shares) Weighted average number of ordinary shares outstanding - basic and diluted CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Ordinary Share Additional Paid In Capital [Member] Additional Paid-in Capital Retained Earnings Appropriated [Member] Retained Earnings-Appropriated Retained Earnings Unappropriated [Member] Retained Earnings-Unappropriated Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Loss Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity The amount of net income allocated to statutory reserves. Appropriations to Statutory Reserves Transfer to statutory reserves CONSOLIDATED STATEMENTS OF CASH FLOWS Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Amount of nonoperating interest income, including amortization and accretion of premiums and discounts, on held-to-maturity securities. Interest Income, Securities, Nonoperating, Held-to-maturity Interest income on held-to-maturity debt securities Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Gain on disposal of property, plant and equipment Depreciation Depreciation Depreciation expenses Amortization of Intangible Assets Amortization expense Amortization of Financing Costs Amortized deferred expenses Amortized debt issuance costs associated to the bonds Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Trade accounts receivable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Accounts Payable, Trade Trade accounts payable Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued expenses and other payables Increase (Decrease) in Income Taxes Payable Income tax payable Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net cash provided by/ (used in) operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Purchases of property, plant and equipment and construction in progress Payments for facility improvements Proceeds from Sale of Property, Plant, and Equipment Proceeds from disposal of property, plant and equipment Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by investing activities Net cash provided by/ (used in) investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Proceeds from Bank Debt Proceeds from borrowings Repayments of Bank Debt Repayments of borrowings Bank debt repaid Represents the cash outflow for settlement of bonds. Payments for Settlement of Bonds Settlement of bonds Represents the amount of cash inflow from the issuance of bonds, net of issuance costs paid during the period. Proceeds from Issuance of Bonds Net of Issuance Cost Proceeds from the issuance of bonds, net of debt issuance costs paid Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Net cash provided by/(used in) financing activities Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of foreign currency exchange translation Effect of exchange rate changes on cash and cash equivalents Cash, Period Increase (Decrease) Net increase/ (decrease) in cash Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information: Income Taxes Paid Cash paid for income taxes Interest Paid Cash paid for interest N/A. Non-cash investing activities: Capital Expenditures Incurred but Not yet Paid Accrued fixed asset purchases Amount represents the offsetting other payables to the debt securities issuer for the principal amounts of held-to-maturity debt securities to be received upon matured. Offsetting Other Payables to the Debt Securities Issuer for the Principal Amounts of Held-to-Maturity Debt Securities to be Received Upon Matured Offsetting other payables to the debt securities issuer for the principal amounts of held-to-maturity debt securities to be received upon matured N/A. Non-cash financing activities: Amount represents the offsetting other receivables from the bonds holder upon the settlement of bonds. Offsetting Other Receivables from the Bonds Holder Upon the Settlement of Bonds Offsetting other receivables from the bonds holder upon the settlement of bonds Description of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Description of Business Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Fair Value Measurements Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Trade Accounts Receivable, Net Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Trade Accounts Receivable, Net Inventories Inventory Disclosure [Text Block] Inventories Advance to Suppliers Disclosure of advances to suppliers. Advance to Suppliers [Text Block] Advance to Suppliers Other Receivables The entire disclosure of the carrying amounts due as of the balance sheet date from various parties or arising from transactions not otherwise specified in the taxonomy. Other Receivables [Text Block] Other Receivables Property, Plant and Equipment, Net Property, Plant and Equipment Disclosure [Text Block]. Property, Plant and Equipment, Net Land Use Rights, Net. Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets [Line Items] Land Use Rights, Net Intangible Assets, Net Intangible Assets Disclosure [Text Block] Land Use Rights, Net Accrued Expenses and Other Payables The entire disclosure for accrued expenses, and other liabilities that are classified as current at the end of the reporting period. Accrued Expenses and Other Liabilities Disclosure [Text Block] Accrued Expenses and Other Payables Borrowings The entire disclosure for information about borrowings. Borrowings Disclosure [Text Block] Borrowings Bonds Payable The entire disclosure for information about bonds payable. Bonds Payable Disclosure [Text Block] Bonds Payable Restricted Net Assets Restricted Assets Disclosure [Text Block] Restricted Net Assets Income Tax Expenses Income Tax Disclosure [Text Block] Income Tax Expenses Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block]. Commitments and Contingencies Segment Information Segment Reporting Disclosure [Text Block] Segment Information Condensed Financial Information of New Borun Condensed Financial Information of Parent Company Only Disclosure [Text Block] Condensed Financial Information of New Borun Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation and Presentation Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Translation Disclosure of accounting policy for convenience translation of financial statements from reporting currency into another currency. Convenience Translation [Policy Text Block] Convenience Translation into United States Dollar Amounts Use of Estimates, Policy [Policy Text Block] Use of Estimates Cash and Cash Equivalents, Policy [Policy Text Block] Cash Trade and Other Accounts Receivable, Policy [Policy Text Block] Accounts Receivable Inventory, Policy [Policy Text Block] Inventories Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant, and Equipment Disclosure of accounting policy for land use rights. Land Use Rights [Policy Text Block] Land Use Rights Intangible Assets, Finite-Lived, Policy [Policy Text Block] Intangible Assets Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Valuation of Long-Lived Assets Disclosure of accounting policy for value added tax. Value Added Tax Policy [Text Block] Value added tax Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Cost of Sales, Policy [Policy Text Block] Cost of Goods Sold Research and Development Expense, Policy [Policy Text Block] Research and Development Costs Advertising Cost, Policy, Expensed Advertising Cost [Policy Text Block] Advertising Expenses Shipping and Handling Cost, Policy [Policy Text Block] Shipping and Handling Costs Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Allowance for Doubtful Accounts Pension and Other Postretirement Plans, Policy [Policy Text Block] Retirement and Other Postretirement Benefits Disclosure of accounting policy for borrowing cost. Borrowing Cost [Policy Text Block] Borrowing cost Disclosure of accounting policy for government Subsidies. Government Subsidies, Policy [Policy Text Block] Government Subsidies Income Tax, Policy [Policy Text Block] Income Taxes Comprehensive Income, Policy [Policy Text Block] Comprehensive Income (Loss) Disclosure of accounting policy for appropriated retained earnings. Appropriated Retained Earnings [Policy Text Block] Appropriated Retained Earnings Disclosure of accounting policy for dividends. Dividends [Policy Text Block] Dividends Earnings Per Share, Policy [Policy Text Block] Earnings Per Share Disclosure of accounting policy for operating risks, including but not limited to, concentration of credit risk, interest risk, liquidity risk, country risk and relevant risk factors. Operating Risk [Policy Text Block] Operating Risk New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncements Adopted and Not Yet Adopted Tabular disclosure of useful lives of physical assets used in the normal conduct of business and not intended for resale. Property, Plant and Equipment Useful Life [Table Text Block] Schedule of estimated useful lives for property, plant and equipment Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of computation of basic and diluted earnings per share Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of trade accounts receivable, net Schedule of Inventory, Current [Table Text Block] Schedule of inventory Tabular disclosure of advances to suppliers. Advance to Suppliers [Table Text Block] Schedule of advances to suppliers Tabular disclosure of the carrying amounts of other receivables. Schedule of Other Receivables [Table Text Block] Schedule of other receivables Property, Plant and Equipment [Table Text Block] Schedule of property, plant and equipment, net Schedule of Finite-Lived Intangible Assets [Table Text Block] Summary of land use rights Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of future amortization of land use rights Schedule of Accrued Liabilities [Table Text Block] Summary of accrued expenses and other payables Tabular disclosure of short-term and long-debt instruments or arrangements excluding bonds payable by financial institution. Schedule of Debt Excluding Bonds Payable by Financial Institution [Table Text Block] Schedule of borrowings Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Summary of income tax expenses Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of reconciliation between total income tax expenses and the amount computed by applying the statutory income tax rate to income before income tax expenses Tabular disclosure of the total revenues, profit or loss, total assets and other significant items, such as interest income, interest expense, income tax expense, capital expenditure and depreciation and amortization for each reportable segment and reconciliation from the reportable segments to the entity's consolidated level. Schedule of Segment Reporting information by Segment and Reconciliation from Segments to Consolidated [Text Block] Schedule of contributions of the major activities, profitability information and asset information of reportable segments Condensed Balance Sheet [Table Text Block] CONDENSED BALANCE SHEETS Condensed Income Statement [Table Text Block] CONDENSED STATEMENTS OF INCOME Condensed Cash Flow Statement [Table Text Block] CONDENSED STATEMENTS OF CASH FLOWS Schedule of Subsidiary or Equity Method Investee [Table] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Represents China New Borun Corporation (New Borun), the holding company, incorporated in Cayman Islands on December 21, 2009. China New Borun Corporation [Member] New Borun Represents Golden Direction Limited (Golden Direction), incorporated in the British Virgin Islands on March 28, 2008. As of the reporting date, it's the wholly owned subsidiary of the holding company. Golden Direction [Member] Golden Direction Represents China High Enterprises Limited, or China High, the company's Hong Kong holding company. China High [Member] China High Represents Shandong Borun Industrial Co., Ltd. (Shandong Borun), the operating company and the predecessor of the company. Shandong Borun [Member] Shandong Borun Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Represents Daqing Borun Biotechnology Co., Ltd (Daqing Borun), a company formerly called Daqing Anxin Tongwei Alcohol Manufacturing Co., Ltd. (Anxin Tongwei), a limited liability company established under the laws of the PRC on September 20, 2004 in Daqing city, Heilongjiang Province, China. Daqing Borun [Member] Daqing Borun Investment, Name [Axis] Equity Method Investee Name [Domain] Investment, Name [Domain] Range [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum Subsidiary or Equity Method Investee [Line Items] Description of business Business Acquisition, Percentage of Voting Interests Acquired Percentage of voting interests acquired Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage Percentage of voting capital stock held Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Total purchase price Idle period prior to acquisition. Idle Period Prior to Acquisition Idle period prior to acquisition Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Percentage of direct control Percentage of income (loss) based on income (loss) before income taxes. Percentage of Income (Loss) based on Income (Loss) Before Income Tax Income before income tax expenses (as a percentage) Number of Reportable Segments Number of reportable segments Represents the exchange rate used for convenience translation from reporting currency to additional disclosures in another currency. Foreign Currency Translation Rate Rate used to convert RMB to USD Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Building And Building Improvements [Member] Buildings and improvements Tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds. Machinery [Member] Machinery Equipment commonly used in an office setting. Examples include, but are not limited to, computers, copiers desks, chairs, tables, and bookcases. Office Equipment And Furnishing [Member] Office equipment and furnishing Vehicles [Member] Motor vehicles Maximum [Member] Maximum Property, Plant and Equipment [Line Items] Property, plant and equipment, net Property, Plant and Equipment, Useful Life Estimated useful lives Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Use Rights [Member] Land use rights Licensing Agreements [Member] Production license Finite-Lived Intangible Asset, Useful Life Useful life Finite-Lived Intangible Asset, Weighted Average Period before Next Renewal or Extension Production license renewal term Impairment or Disposal of Tangible Assets Disclosure [Abstract] Impairment or Disposal of Tangible Assets Disclosure Schedule of significant accounting policies. Schedule of Significant Accounting Policy [Table] Geographical [Axis] Segment Geographical [Domain] Geographical [Domain] C [N] PRC Significant Accounting Policy [Line Items] Significant Accounting Policy Represents value added tax rate. Value Added Tax Rate Value added tax rate (as a percent) Input value added tax amount (VAT) paid for purchase of goods but not yet validated by the PRC Taxing Authority, included in VAT recoverable. Input VAT Paid But Not Yet Validated Input VAT paid for purchase of corns but not yet validated by the PRC Taxing Authority Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Retirement and other postretirement benefits Defined Contribution Plan, Cost Recognized Expense for employee benefits Interest Costs Capitalized Interests capitalized as borrowing cost in property, plant and equipment Unrecognized Tax Benefits Uncertain tax positions Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Estimated interest costs and penalties provided for uncertain tax positions Statute of limitations period from tax examination standpoint. Statute of Limitations Period Statute of limitations period Threshold percentage criteria expressed as statutory surplus reserves as a percentage of registered capital. The threshold is used to determine whether the statutory surplus reserve can be converted into capital in proportion to the existing equity interests of shareholders. Threshold Percentage of Statutory Surplus Reserve of Registered Capital Threshold percentage to determine whether statutory surplus reserves can be converted into capital Represents the required minimum percentage of after tax profit allocated to statutory surplus reserve by the entity. Required Percentage of after Tax Profit Allocated to Statutory Surplus Reserves Required minimum percentage of after-tax-profit allocated to statutory surplus reserve Represents the threshold percentage criteria expressed as a percentage of registered capital for the transfer of after-tax profit by the entity to statutory surplus reserves. If the statutory surplus reserves exceed the specified threshold of the registered capital, further appropriation is not required. Threshold Percentage of Statutory Surplus Reserve Need to be Made over Entities Registered Capital Threshold percentage of statutory surplus reserves of the registered capital, used as criteria of allocation requirement Represents the annual percentage of after tax profit allocated to statutory surplus reserve by the entity. Annual Percentage of after Tax Profit Allocated to Statutory Surplus Reserves Annual percentage of after-tax-profit allocated to statutory surplus reserve Operating Risk [Abstract] Operating Risk Concentration Risk, Percentage concentration of risk Accounts Receivable, Gross, Current Trade accounts receivable Loans and Leases Receivable, Collateral for Secured Borrowings Trade accounts receivables pledged as collateral for borrowings from financial institutions Inventory, Current [Table] Inventory [Axis] Public Utilities Inventory Type [Domain] Inventory [Domain] Public Utilities Inventory Raw Materials [Member] Raw materials Inventory [Line Items] Inventories Inventory, Raw Materials, Gross Raw materials Inventory, Work in Process, Gross Work-in-process Inventory, Finished Goods, Gross Finished goods Debt Instrument, Collateral Amount Amount pledged as collateral for borrowings from the financial institutions Amount pledged as collateral for borrowings from financial institutions Deposit Assets Advance to granaries Other Assets, Current Others Represents value added tax recoverable as of reporting date. Value Added Tax Recoverable VAT recoverable Security Deposit Deposit for loan guarantee Other Receivables, Net, Current Others Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Excluding construction in progress. Property Plant and Equipment Gross Excluding Construction in Progress Total cost Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total accumulated depreciation Construction in Progress, Gross Construction in progress Finite-Lived Intangible Assets, Gross Land use rights at cost Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Finite-Lived Intangible Assets, Net Total Impairment of Intangible Assets, Finite-lived Provision for impairment loss charged Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Future amortization of land use rights Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2023 Finite-Lived Intangible Assets, Amortization Expense, after Year Five Thereafter Employee-related Liabilities, Current Payroll and welfare payables Sales and Excise Tax Payable, Current VAT and other tax payables Other Accrued Liabilities, Current Other payables and accruals Schedule of Long-term Debt Instruments [Table] Lender Name [Axis] Line Of Credit Facility Lender [Domain] Line of Credit Facility, Lender [Domain] Represents the lender, Agricultural Bank of China. Agricultural Bank Of China [Member] Agricultural Bank of China Represents the lender, Agricultural Bank of China in 2017. Agricultural Bank Of China In2017 [Member] Agricultural Bank of China in 2017 Represents the lender, Construction Bank of China. Construction Bank Of China [Member] Construction Bank of China Represents the lender, Construction Bank of China in 2017. Construction Bank Of China In2017 [Member] Construction Bank of China in 2017 Represents the lender, China Construction Bank. China Construction Bank [Member] China Construction Bank Represents the lender, China CITIC Bank. China C I T I C Bank [Member] China CITIC Bank Represents the lender, Daqing Rural Commercial Bank. Daqing Rural Commercial Bank [Member] Daqing Rural Commercial Bank Debt Instrument [Line Items] Bonds Payable Borrowings Number of third-party companies pledged for the debt instrument. Number of Third-party Companies Number of third-party companies Number of natural persons pledged for the debt instrument. Number of Natural Persons Number of natural persons Interest Expense, Debt Interest expenses related to borrowings Face amount or stated value per share of Bonds issued. Debt Instrument Issued Par or Stated Value Per Share Face value of Bonds issued (in CNY or USD per share) Debt Instrument, Maturity Date Debt instrument, maturity date Debt Instrument, Periodic Payment, Principal Amount to be repaid at the end of each of the third, fourth and fifth year life of the Bonds Interest Costs Incurred Interests incurred Prepaid Interest Prepaid interests Debt Issuance Costs, Gross Cost associated to the debt issuance of Bonds Long-term Debt, Excluding Current Maturities [Abstract] Non-current liabilities Long-term Debt, Current Maturities [Abstract] Current liabilities Represents the required minimum percentage of after tax profit allocated to general reserve for foreign invested enterprise per PRC regulations and articles of association. Required Percentage of after Tax Profit Allocated to General Reserve Required minimum percentage of after-tax-profit allocated to general reserve Represents the threshold percentage criteria expressed as a percentage of registered capital for the transfer of after-tax profit by foreign invested enterprise in China to general reserve fund. If the general reserve fund exceeds the specified threshold of the registered capital, further appropriation is not required. Threshold Percentage of General Reserve Need to be Made over Entities Registered Capital Threshold percentage of general reserve of the registered capital, used as criteria of allocation requirement Represents the required minimum percentage of after tax profit allocated to statutory common reserve for domestic enterprise per company law of the PRC. Required Percentage of after Tax Profit Allocated to Statutory Common Reserve Required minimum percentage of after-tax-profit allocated to statutory common reserve Represents the threshold percentage criteria expressed as a percentage of registered capital for the transfer of after-tax profit by domestic invested enterprise in China to statutory common reserve funds. If the statutory common reserve fund exceeds the specified threshold of the registered capital, further appropriation is not required. Threshold Percentage of Statutory Common Reserve Need to be Made over Entities Registered Capital Threshold percentage of statutory common reserve of the registered capital, used as criteria of allocation requirement Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries Amount of restricted paid-in-capital and statutory reserve funds Disclosures pertaining to income taxes. Income Taxes [Table] K [Y] Cayman Islands V [G] British Virgin Islands H [K] Hong Kong Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Income Tax Disclosure [Line Items] Income taxes Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Statutory tax rate (as a percent) Statutory rate (as a percent) Withhold income tax rate on dividends paid-out to foreign entities. Withholding Income Tax Rate on Dividends Paid Out Tax rate on dividends (as a percent) Withholding income tax accrual for dividends paid-out or to be paid-out to foreign entities. Withholding Income Tax Accrual Withholding income tax accrued Effective Income Tax Rate Reconciliation, Percent Effective tax rate (as a percent) Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation Category Of Goods Or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Capital Additions [Member] Capital commitment for purchase of property, plant and equipment Unrecorded Unconditional Purchase Obligation [Line Items] Commitments and contingencies Unrecorded Unconditional Purchase Obligation Purchase obligations Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Domain] Loss Contingency, Nature [Domain] Guarantee Of Indebtedness Of Others [Member] Guarantee of short-term bank loans Counterparty Name [Axis] Repurchase Agreement Counterparty Name [Domain] Counterparty Name [Domain] Third parties, whose short-term bank loans are guaranteed by the entity. Third Parties Guaranteed [Member] Third parties guaranteed Loss Contingencies [Line Items] Commitments and contingencies Guarantor Obligations, Maximum Exposure, Undiscounted Guaranteed amount Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating segments Segments [Axis] Segment [Domain] Segments [Domain] Represents the Corn-base edible alcohol and its by-products segment of the entity. Corn Base Edible Alcohol And By Products Segment [Member] Corn-base edible alcohol and its by-products Represents the chemical products segment of the entity. Chemical Products [Member] Chemical products Segment Reporting Information [Line Items] Segment information Payments to Acquire Productive Assets Capital expenditure Depreciation, Depletion and Amortization Depreciation and amortization Condensed Balance Sheet Statement [Table] Parent Company [Member] New Borun Condensed Balance Sheet Statements, Captions [Line Items] CONDENSED BALANCE SHEETS Due from Affiliate, Current Amounts due from subsidiaries Equity Method Investments Investments in subsidiaries Condensed Income Statement [Table] Condensed Income Statements, Captions [Line Items] CONDENSED STATEMENTS OF INCOME Nonoperating Income (Expense) [Abstract] Other income: Income (Loss) from Subsidiaries, before Tax Equity in earnings of subsidiaries Condensed Cash Flow Statement [Table] Condensed Cash Flow Statements, Captions [Line Items] CONDENSED STATEMENTS OF CASH FLOWS Represents the Foam insulation segment of the entity. Foam Insulation Segment [Member] Foam insulation Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Represents a written promise to pay a note to a bank, due January 04, 2019. Notes Payable To Bank Due January042019 [Member] Notes payable to bank due January 04, 2019 Represents a written promise to pay a note to a bank, due January 28, 2019. Notes Payable To Bank Due January282019 [Member] Notes payable to bank due January 28, 2019 Represents a written promise to pay a note to a bank, due June 07, 2019. Notes Payable To Bank Due June072019 [Member] Notes payable to bank due June 07, 2019 Represents a written promise to pay a note to a bank, due June 13, 2019. Notes Payable To Bank Due June132019 [Member] Notes payable to bank due June 13, 2019 Represents a written promise to pay a note to a bank, due July 15, 2019. Notes Payable To Bank Due July152019 [Member] Notes payable to bank due July 15, 2019 Represents a written promise to pay a note to a bank, due August 15, 2019. Notes Payable To Bank Due August152019 [Member] Notes payable to bank due August 15, 2019 Represents a written promise to pay a note to a bank, due September 12, 2019. Notes Payable To Bank Due September122019 [Member] Notes payable to bank due September 12, 2019 Represents a written promise to pay a note to a bank, due September 28, 2019. Notes Payable To Bank Due September282019 [Member] Notes payable to bank due September 28, 2019 Represents a written promise to pay a note to a bank, due October 10, 2019. Notes Payable To Bank Due October102019 [Member] Notes payable to bank due October 10, 2019 Represents a written promise to pay a note to a bank, due October 11, 2019. Notes Payable To Bank Due October112019 [Member] Notes payable to bank due October 11, 2019 Represents a written promise to pay a note to a bank, due October 26, 2019. Notes Payable To Bank Due October262019 [Member] Notes payable to bank due October 26, 2019 Represents a written promise to pay a note to a bank, due November 05, 2019. Notes Payable To Bank Due November052019 [Member] Notes payable to bank due November 05, 2019 Represents a written promise to pay a note to a bank, due November 09, 2019. Notes Payable To Bank Due November092019 [Member] Notes payable to bank due November 09, 2019 Represents a written promise to pay a note to a bank, due December 31, 2018. Note Payable To Bank Due December312018 [Member] Notes payable to bank due December 31, 2018 Represents a written promise to pay a note to a bank, due December 31, 2019. Notes Payable To Bank Due December312019 [Member] Notes payable to bank due December 31, 2019 Represents a written promise to pay a note to a bank, due February 11, 2019. Notes Payable To Bank Due February112019 [Member] Notes payable to bank due February 11, 2019 Represents a written promise to pay a note to a bank, due March 06, 2019. Notes Payable To Bank Due March062019 [Member] Notes payable to bank due March 06, 2019 Represents a written promise to pay a note to a bank, due March 15, 2019. Notes Payable To Bank Due March152019 [Member] Notes payable to bank due March 15, 2019 Represents a written promise to pay a note to a bank, due March 16, 2019. Notes Payable To Bank Due March162019 [Member] Notes payable to bank due March 16, 2019 Represents a written promise to pay a note to a bank, due April 12, 2019. Notes Payable To Bank Due April122019 [Member] Notes payable to bank due April 12, 2019 Represents a written promise to pay a note to a bank, due April 21, 2019. Notes Payable To Bank Due April212019 [Member] Notes payable to bank due April 21, 2019 Represents a written promise to pay a note to a bank, due May 09, 2019. Notes Payable To Bank Due May092019 [Member] Notes payable to bank due May 09, 2019 Represents a written promise to pay a note to a bank, due December 29, 2019. Notes Payable To Bank Due December292019 [Member] Notes payable to bank due December 29, 2019 Represents a written promise to pay a note to a bank, due October 15, 2019. Notes Payable To Bank Due October152019 [Member] Notes payable to bank due October 15, 2019 Represents a written promise to pay a note to a bank, due September 07, 2018. Notes Payable To Bank Due September072018 [Member] Notes payable to bank due September 07, 2018 Represents a written promise to pay a note to a bank, due August 17, 2019. Notes Payable To Bank Due August172019 [Member] Notes payable to bank due August 17, 2019 Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Interest Expense [Member] Interest expense