Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Balance Sheets [Abstract] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash Cash and cash equivalents Cash at beginning of year Cash at end of year Restricted Cash and Cash Equivalents, Current Pledged bank BANK DEPOSITS Pledged bank deposits Contractual capital commitments for purchases of equipment Accounts and Other Receivables, Net, Current Bills receivable Accounts Receivable, Net, Current Balance of accounts receivable Accounts receivable Accounts Receivable, Net, Current, Total Inventory, Net Inventories Total Advances On Inventory Purchases Prepayments to suppliers Consumption tax refund receivable Consumption tax recoverable Due from Related Parties, Current Amounts due from related parties Due from Related Parties, Current, Total Amounts due to related parties Other Assets, Current Other current assets Other current assets Deferred Tax Assets, Net of Valuation Allowance, Current Deferred tax assets Deferred income tax assets Deferred Tax Assets, Net, Current, Total Deferred Tax Assets, Net, Current, Beginning Balance Deferred Tax Assets, Net, Current, Ending Balance Assets, Current Total current assets Total current assets Property, Plant and Equipment, Net Property, plant and equipment, net Property, plant and equipment, Net Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Intangibles assets, net Finite-Lived Contractual Rights, Gross Land use rights Land use rights, Total Prepaid Expense, Noncurrent VAT recoverable included in non-current assets VAT recoverable Prepaid Expense, Noncurrent, Total Assets Total assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current Liabilities: Short-term Bank Loans and Notes Payable Bank borrowings-secured/guaranteed Short-term bank borrowings SHORT-TERM BANK BORROWINGS Accounts Payable, Other, Current Bills payable Accounts Payable, Current Accounts payable Accounts Payable, Current, Total Customer Advances, Current Advances from customers Accounts Payable and Other Accrued Liabilities, Current Accrued expenses and other payables Accrued expenses and other payables Taxes Payable, Current Income tax payable Taxes Payable, Current, Total Dividends Payable Dividends payable Interest and Dividends Payable, Current, Total Liabilities, Current Total current liabilities Total liabilities, all current Temporary Equity, Carrying Amount, Attributable to Parent Series B convertible preferred stock:Par value:$0.001; Authorized: 8,000,000 shares issued and outstanding: 5,333,340 shares, liquidation preference $20,250 Commitments and Contingencies Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Common Stock, Value, Issued Common stock: Par value: $0.001; Authorized: 100,000,000 shares Issued and outstanding: 57,335,736 and 57,520,012 shares, as at March 31,2014 and December 31, 2013, respectively Common Stock, Value, Issued, Total Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Ending Balance Additional Paid In Capital Additional paid-in capital Additional paid-in capital Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Ending Balance Statutory Accounting Practices, Statutory Capital and Surplus, Balance Statutory reserve Accumulated Other Comprehensive Income (Loss), Net Of Tax Accumulated other comprehensive income Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Retained Earnings (Accumulated Deficit) Retained earnings Retained earnings (deficit) Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Treasury Stock, Value Treasury stock, at cost, 310,424 and 126,148 shares at March 31,2014 and December 31, 2013, respectively Treasury stock, at cost, 310,424 and 126,148 shares at March 31,2014 and December 31, 2013, respectively Stockholders' Equity Attributable to Parent Total stockholders' equity Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Total liabilities and stockholders' equity Temporary Equity, Par Or Stated Value Per Share Series B convertible preferred stock, par value Temporary Equity, Shares Authorized Series B convertible preferred stock, shares authorized Temporary Equity, Shares Issued Series B convertible preferred stock, share issued Temporary Equity, Shares Outstanding Series B convertible preferred stock, shares outstanding Temporary Equity, Liquidation Preference Series B convertible preferred stock, Liquidation preference value Common Stock, Par Or Stated Value Per Share Par value of issued common stock Common stock, par value Common Stock, Shares Authorized Authorized common stock Common stock, shares authorized Common Stock, Shares, Issued Common stock share issued by the company upon the completion of the Series A Private Placement Common stock, shares issued Common Stock, Shares, Issued, Total Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding, Ending Balance Treasury Stock, Shares Treasury Stock, Shares Statements of Comprehensive Income (Loss) [Abstract] Income Statement [Abstract] Revenue, Net Sales Cost of Revenue Cost of sales Gross Profit Gross profit (loss) Gross profit Selling Expense Selling expenses General and Administrative Expenses General and administration expenses General and Administrative Expense, Total General and administrative expenses Operating Expenses Total operating expenses Total operating expenses Income (loss) from operations Income (loss) from operations Income from operations Nonoperating Income (Expense) [Abstract] Other income (expenses): Interest income Corporate interest income Interest income Interest expense Interest expense Interest expense Interest Expense, Debt, Total Interest expense Foreign exchange (loss) gain, net Corporate gain on modification of convertible notes Foreign exchange gain (loss) , net Other income (expense), net Corporate other income Other expenses, net Other Nonoperating Income (Expense), Total Nonoperating Income (Expense) Total other expense, net Total other income (expenses), net Income (loss) before income taxes Total income before income taxes Loss before income taxes (Loss) income before income taxes Loss before income taxes Loss before income taxes Income tax expense Actual income tax expense Income tax expense Actual (Total) income tax expense Income tax expense Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Net (loss) income attributable to Keyuan Petrochemicals Inc. stockholders Net income (loss) attributable to Keyuan Petrochemicals Inc. stockholders Net (loss) income attributable to Keyuan Petrochemicals Inc. stockholders Preferred Stock Dividends, Income Statement Impact Dividends to Series B convertible preferred stockholders Net Income (Loss) Available to Common Stockholders, Basic Net loss attributable to Keyuan Petrochemicals Inc. common stockholders Net (loss) income contributable to KeyuanPetrochemicals Inc. common stockholders Net (loss) income attributable to Keyuan Petrochemicals Inc. common stockholders Net (loss) income attributable to Keyuan Petrochemicals Inc. common stockholders Other Comprehensive Income (Loss), Net Of Tax [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net Of Tax Other comprehensive income - Foreign currency translation loss Foreign currency translation adjustment Comprehensive Income (Loss), Net Of Tax, Attributable To Parent Comprehensive income Comprehensive (loss) income EARNINGS (LOSS) PER SHARE Attributable to common stockholders: (Loss) earnings per share: Attributable to common stock: Earnings Per Share, Basic Basic net (loss) income per share : -Basic Earnings Per Share, Basic, Total Earnings Per Share, Diluted Diluted net (loss) income per share: -Diluted Earnings Per Share, Diluted, Total Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Weighted average number of shares of common stock used in calculation: Weighted Average Number of Shares Outstanding, Basic Weighted average common share -Basic Weighted average common share (Denominator for basic income per share) Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Diluted Diluted -Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Statements of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Related Party [Member] Related Party [Member] Statement [Line Items] Statement [Line Items] Cash Flows From Operating Activities Cash flows from operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net (loss) income attributable to Keyuan Petrochemicals, Inc. stockholders Net (loss) income Net income Net income (loss) attributable to Keyuan Petrochemicals Inc. stockholders Net loss Adjustments To Reconcile Net Income To Net Cash Provided By (Used In) Operating Activities Adjustments to reconcile net (loss) income to net cash used in operating activities: Depreciation Depreciation expense Depreciation Depreciation expense Amortization Amortization expense Amortization Amortization, Total Other Depreciation and Amortization Amortization expense related to land use rights Land use rights amortization Deferred Income Tax Expense (Benefit), Total Deferred income tax expense Share-Based Compensation Expense Share-based compensation expense Share-based Compensation, Total Increase (Decrease) In Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) In Accounts and Other Receivables Bills receivable Bills receivable Increase (Decrease) In Accounts Receivable Account receivable Accounts receivable Increase (Decrease) In Inventories Inventories Increase (Decrease) in Inventories, Total Inventories Increase (Decrease) In Prepaid Expense Prepayments to suppliers Prepayments to suppliers Increase (Decrease) In Income Taxes Receivable Consumption tax refund receivable Consumption tax refund receivable Other Current Assets Decrease in other assets Other current assets Other current assets Increase (Decrease) in Accounts Payable, Trade Decrease in trade payables Accounts payable Increase (Decrease) In Deferred Revenue Advances from (to) customers Increase (Decrease) In Income Taxes Payable Income taxes payable Increase (Decrease) In Other Accounts Payable and Accrued Liabilities Accrued expenses and other payables Net cash (used in) provided by operating activities Net cash (used in) provided by operating activities Net cash provided by operating activities Net cash used in operating activities Cash Flows From Investing Activities Cash flows from investing activities: Purchase of property, plant and equipment, Purchase of property, plant and equipment, Payments to Acquire Property, Plant, and Equipment, Total Purchase of property, plant and equipment Net Cash Provided By (Used In) Investing Activities, Total Net cash used in investing activities Net cash used in investing activities Cash Flows From Financing Activities Cash flow from financing activities: Proceeds From (Repayments Of) Restricted Cash, Financing Activities Pledged bank deposits used for bank borrowings Proceeds from Short-term Debt Proceeds from short-term bank borrowings Proceeds from Short-term Debt, Total Repayments Of Short-Term Debt Repayment of short-term bank borrowings Repayments of Short-term Debt, Total Repayment of short-term bank borrowings Proceeds From Bank Debt Proceeds from bank notes Repayments Of Bank Debt Repayment of bank notes Repayments of bank notes Payments for Repurchase of Common Stock Repurchase of treasury stock Net Cash Provided By (Used In) Financing Activities, Total Net cash provided by financing activities Net cash provided by financing activities Effect Of Exchange Rate On Cash and Cash Equivalents Effect of foreign currency exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents, Total Cash and Cash Equivalents, Period Increase (Decrease), Total Net increase (decrease) in cash Net increase in cash Net increase (decrease) in cash Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information: Income Taxes Paid Income tax paid Interest Paid, Net Interest paid, net of capitalized interest Noncash Investing and Financing Items [Abstract] Non cash investing and financing activities: Payable For Purchase Of Property, Plant and Equipment Payable for purchase of property, plant and equipment (net of VAT) Payable for purchase of property, plant and equipment in a non-cash financing activity. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation Of Financial Statements Disclosure and Significant Accounting Policies [Text Block] ORGANIZATION AND NATURE OF BUSINESS, RECENT EVENTS, AND GOING CONCERN AND MANAGEMENT'S PLANS Business Description and Basis of Presentation [Text Block] BASIS OF PRESENTATION Inventories [Abstract] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] INVENTORIES Consumption Tax Recoverable [Abstract] Consumption Tax Refund Receivable [Abstract] Tax Refund Receivable [Text Block] CONSUMPTION TAX RECOVERABLE Disclosure of tax refund receivable. Other Current Assets [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Other Current Assets [Text Block] OTHER CURRRENT ASSETS Short-Term Bank Borrowings [Abstract] Short-term Debt [Abstract] Short-Term Debt [Text Block] SHORT-TERM BANK BORROWINGS Commitments and Contingencies [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES Income Taxes [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] INCOME TAXES Earnings Per Share [Text Block] EARNINGS (LOSS) PER SHARE Equity [Abstract] Stock Repurchase Program [Abstract] Treasury Stock [Text Block] STOCK REPURCHASE PROGRAM Fair Value Disclosures [Abstract] Trading loss of heavy oil Fair Value Measurement/Significant Concentrations and Risks [Abstract] Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENTS Significant Concentrations And Risk [Text Block] SIGNIFICANT CONCENTRATIONS AND RISKS Significant concentrations and risk. Related Party Transactions [Abstract] Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS AND RELATIONSHIPS AND TRANSACTIONS WITH CERTAIN OTHER PARTIES Consolidated Segment Data [Abstract] Consolidated Segment Data [Abstract] Segment Reporting Disclosure [Text Block] CONSOLIDATED SEGMENT DATA Schedule Of Inventory, Current [Table Text Block] Schedule of Inventory Schedule Of Other Current Assets [Table Text Block] Other current assets Schedule Of Short-Term Debt [Table Text Block] Summary of short-term bank borrowings Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Computation of basic net income per share: Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of warrants and options excluded from the calculation of diluted earnings per share: Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Summary of sales to major customers Schedule Of Related Party Transactions [Table Text Block] Related party transactions, Relationships Related Party Transactions Amount Outstanding [Table Text Block] Related party transactions and amounts outstanding with the related parties Related Party Transactions, Amount Outstanding. Related Party Transaction Guarantees For Bank Loans [Table Text Block] Guarantees for bank loans Related party transaction guarantees for bank loans. Relationships and Transactions With Certain Other Parties [Table Text Block] Relationships and transactions with certain other parties Relationships and transactions with certain other parties. Transactions and Amounts Outstanding With Certain Other Parties [Table Text Block] Transactions and amounts outstanding with certain other parties Transactions and amounts outstanding with certain other parties. Guarantees For Bank Loans With Certain Other Parties [Table Text Block] Guarantees for bank loans with certain other parties Guarantees for Bank Loans with certain other parties. Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of selected information in segment structure presented in following tables Scenario [Axis] Scenario, Unspecified [Domain] June Two Zero One Four [Member] June 2014 [Member] May Two Zero One Four [Member] May 2014 [Member] September Two Zero One Four [Member] September 2014 [Member] Organization and Nature Of Business Recent Events and Going Concern and Managements Plans Textual [Abstract] Organization and Nature of Business, Recent Events, and Going Concern and Management's Plans (Textual) Organization and description of business. Working Capital Deficit Working capital deficit Working capital deficit. Short-term Debt Short-term bank borrowings and bills payable Additional Consumption Tax Refund Additional consumption tax refund Additional consumption tax refund received. Consumption Tax Refund Consumption tax refund Consumption tax refund. Consumption Tax To Be Deducted Deductible consumption tax Consumption Tax To Be Deducted. Value Added Tax Receivable VAT refunded Inventory, Net [Abstract] Schedule of Inventory Inventory, Raw Materials, Gross Raw materials Inventory, Finished Goods, Gross Finished goods Inventory, Work In Process, Gross Work-in-process Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Line Items] Tax Refund Receivable (Textual) [Abstract] Consumption Tax Recoverable (Textual) Tax Refund Receivable . Components Of Other Current Assets [Abstract] Components of other current assets Vat Recoverable VAT recoverable VAT recoverable. Customs Deposits For Imported Inventories Customs deposits for imported inventories Customs deposits for imported inventories. Others Other Others Other Current Assets (Textual) [Abstract] Other Current Assets (Textual) Other Current Assets. Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] China Construction Bank [Member] China Construction bank [Member] China construction bank. Shanghai Pudong Development Bank [Member] Shanghai Pudong Development Bank [Member] Shanghai Pudong Development Bank [Member] Shanghai pudong development bank. Agricultural Bank Of China [Member] Agricultural Bank Of China [Member] Agricultural Bank of China [Member] Agricultural bank of china. Pingan Bank [Member] Pingan Bank [Member] Bank Of Ningbo [Member] Bank Of Ningbo [Member] Bank of Ningbo [Member] Bank of ningbo. Bank Of Communication [Member] Bank of Communication [Member] Bank of Communication [Member] Bank of communication. Bank Of China [Member] Bank of China [Member] Bank of China [Member] Bank of China. China Merchant Bank [Member] China Merchant Bank [Member] China Merchant Bank [Member] China merchant bank. Ningbo Commerce Bank [Member] Ningbo Commerce Bank [Member] China Guangfa Bank [Member] China Guangfa Bank [Member] Bill Payable [Member] Bank deposits pledged for bills payable [Member] Bill payable. Short-term Debt [Line Items] Short-term Debt [Line Items] Short Term Bank Borrowings [Abstract] Summary of short-term bank borrowings Summary of short-term bank borrowings Deposit Liabilities, Collateral Issued, Financial Instruments PLEDGED BANK DEPOSITS Short-Term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-Term Debt, Type [Domain] Short-term Debt, Type [Domain] Bank Loans In Rmb [Member] Bank loans in RMB [Member] Bank loans in RMB. Bank Loans In Usd [Member] Bank Loans In USD [Member] Bank loans in USD. Short Term Bank Borrowings (Textual) [Abstract] Short-Term Bank Borrowings (Textual) Short-Term Debt, Weighted Average Interest Rate Short-term debt outstanding, weighted average interest rate Debt Instrument, Maturity Date, Description Maturity term Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum Interest rate, minimum Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum Interest rate, maximum Amount Guaranteed By Related Party and Third Party Entities and Individuals Amount guaranteed by related party and third party entities and individuals Guaranteed by related party and third-party entities and individuals. Amount Secured By Land Buildings and Equipment Amount secured by land, buildings and equipment Amount secured by land, buildings and equipment. Land Buildings and Equipment Carrying Amount Land buildings and equipment carrying amount Land buildings and equipment carrying amount. Contingency (Textual) [Abstract] Commitments Contingencies (Textual) Letters Of Credit Outstanding, Amount Outstanding letter's of Credit Contractual Obligation Contractual capital commitments for purchases of equipment Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Income Taxes (Textual) [Abstract] Income taxes (Textual) Effective Income Tax Rate Reconciliation, Percent Effective income tax rate Income Taxes Paid, Net Income taxes paid Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Financial Instrument [Axis] Financial Instruments [Domain] Warrant [Member] Employee Stock Option [Member] Options [Member] Class of Stock [Axis] Class of Stock [Domain] Series A Preferred Stock [Member] Series B Preferred Stock [Member] Series M Preferred Stock [Member] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic [Abstract] Basic (loss) earnings per share: Convertible Preferred Stock Converted To Other Securities Series B Fixed dividends to Series B convertible Preferred stockholders Value of convertible preferred stock that was converted to other securities. Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Effect of diluted securities: Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earning Per Share [Abstract] Warrants and options excluded from the calculation of diluted earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Options Equity, Class of Treasury Stock [Line Items] Stock Repurchase Program, Authorized Amount Authorized amount for stock repurchases Stock Repurchase Program Per Share Price Stock repurchase price per share Stock repurchase price per share. Treasury Stock, Shares, Acquired Number of treasury shares acquired Treasury Stock, Value, Acquired, Cost Method Treasury stock value repurchased Schedule of Revenue by Major Customers, by Reporting Segments [Table] Customer [Axis] Customer [Domain] Customer A [Member] Customer A [Member] Customer A Customer B [Member] CustomerB. Revenue, Major Customer [Line Items] Revenues Amount of Sales Revenue Total Sales Concentration Risk, Percentage % Total Sales Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Supplier [Member] Largest three supplier [Member] Supplier Related Party Transaction [Line Items] Related Party Transaction [Line Items] Cash And Bank Deposits Cash and pledged bank deposits Cash and bank deposits. Related Party Transaction, Purchases from Related Party Purchases Related Party Transaction Purchases From Related Party Percentage Purchase, Percentage Related Party Transaction Purchases From Related Party Percentage. Number Of Supplier Number of supplier Number of supplier. Cost of Purchased Oil and Gas Purchase of heavy oil Oil and Gas Sales Revenue Sale of heavy oil Gain (Loss) on Disposition of Oil and Gas Property Trading loss of heavy oil Chunfeng Tao [Member] Mr. Tao [Member] Mr. Chunfeng Tao [Member] Chunfeng Tao. Jicun Wang [Member] Mr. Jicun Wang [Member] Jicun Wang. Peijun Chen [Member] Mr. Peijun Chen [Member] Peijun Chen. Sumei Chen [Member] Ms. Sumei Chen [Member] Sumei Chen. Yushui Huang [Member] Ms. Yushui Huang [Member] Yushui Huang. Ningbo Pacific Ocean Shipping Co Ltd [Member] Ningbo Pacific [Member] Ningbo Pacific Ocean Shipping Co., Ltd (Ningbo Pacific) [Member] Ningbo Pacific Ocean Shipping Co Ltd. Ningbo Hengfa Metal Product Co Ltd [Member] Ningbo Hengfa [Member] Ningbo Hengfa Metal Product Co., Ltd (Ningbo Hengfa, former name "Ningbo Tenglong") [Member] Ningbo Hengfa Metal Product Co. Ltd. Weifeng Xue [Member] Mr. Weifeng Xue [Member] Weifeng Xue. Hengfeng Shou [Member] Mr. Hengfeng Shou [Member] Hengfeng Shou. Shifa Wang [Member] Mr. Shifa Wang [Member] Shifa Wang. Ming Liang Liu [Member] Mr. Ming Liang Liu [Member] Ming Liang Liu. Shegeng Ding [Member] Mr. Shegeng Ding [Member] Shegeng Ding. Fan Zhang [Member] Mr. Fan Zhang [Member] Fan Zhang. Ningbo Kewei Investment Co Ltd [Member] Ningbo Kewei [Member] Ningbo Kewei Investment Co., Ltd. (Ningbo Kewei) [Member] Ningbo Kewei Investment Co Ltd. Shandong Tengda Stainless Steel Co Ltd [Member] Shandong Tengda [Member] Shandong Tengda Stainless Steel Co., Ltd (Shandong Tengda) [Member] Shandong Tengda Stainless Steel Co Ltd. Ningbo Xinhe Logistic Co Ltd [Member] Ningbo Xinhe [Member] Ningbo Xinhe Logistic Co., Ltd (Ningbo Xinhe) [Member] Ningbo Xinhe Logistic Co. Ltd. Ningbo Kunde Petrochemical Co Ltd [Member] Ningbo Kunde [Member] Ningbo Kunde Petrochemical Co, Ltd. (Ningbo Kunde) [Member] Ningbo Kunde Petrochemical Co Ltd. Ningbo Jiangdong Jihe Construction Materials Store [Member] Jiangdong Jihe [Member] Ningbo Jiangdong Jihe Construction Materials Store (Jiangdong Jihe) [Member] Ningbo Jiangdong Jihe Construction Materials Store. Ningbo Wanze Chemical Co Ltd [Member] Ningbo Wanze Chemical Co., Ltd (Ningbo Wanze) [Member] Ningbo Wanze Chemical Co Ltd. Ningbo Zhenhai Jinchi Petroleum Chemical Co Ltd [Member] Zhenhai Jinchi [Member] Ningbo Zhenhai Jinchi Petroleum Chemical Co., Ltd (Zhenhai Jinchi) [Member] Ningbo Zhenhai Jinchi Petroleum Chemical Co Ltd. Ningbo Hengfa Metal Product Co., Ltd [Member] Ningbo Hengfa Metal Product Co., Ltd [Member] Ningbo Tenglong [Member] Ningbo Hengfa Metal Product Co., Ltd (Ningbo Tenglong) [Member] Ningbo Hengfa Metal Product Co., Ltd (Ningbo Tenglong) [Member] Related Party Transactions Relationship [Abstract] Parties to the related party transactions Related Party Transactions Relationship. Related Party Transactions Relationship Relationship Related Party Transactions, Relationship. Due From Related Parties, Current [Abstract] Summary of amount due from related parties Amounts outstanding with the related parties Purchase Of Transportation Services Purchase of transportation services (a) Purchase of transportation services. Related Party Transaction Loan Guarantee Fees Loan guarantee fee (b) Loan guarantee fees (g) Related Party Transaction Loan guarantee fees. Due from Related Parties Amounts due to these parties (h) Amount due from related parties(d) Advance payments to related parties (c) Due to Related Parties Amounts due to related parties(d) Mr Tao [Member] Jicun Wang And Sumei Chen [Member] Ningbo Pacific [Member] Related Party Transaction Guarantees For Bank Loans [Abstract] Guarantees for Bank Loans Related Party Transaction Aggregate Guarantees Provided During Year Guarantee provided Related party transaction, aggregate guarantees provided the during the year. Related Party Transaction Guarantees For Bank Loans Bank loans Guaranteed Related Party Transaction Guarantees for Bank Loans. Ningbo Litong [Member] Ningbo Litong [Member] Ningbo Litong Petrochemical Co., Ltd (Ningbo Litong) [Member] Ningbo Litong. Ningbo Anqi [Member] Ningbo Anqi [Member] Ningbo Anqi Petrochemical Co., Ltd (Ningbo Anqi) [Member] Ningbo Anqi. Ningbo Lide Investment Co Ltd [Member] Ningbo Lide Investment Co., Ltd. (Ningbo Lide) (formerly Ningbo Kewei) Ningbo Kunde [Member] Ningbo Kunde Petrochemical Co., Ltd (Ningbo Kunde) [Member] Ningbo Kunde. Ningbo Kewei [Member] Ningbo Kewei [Member] Ningbo Kewei Investment Co., Ltd (Ningbo Kewei) [Member] Ningbo Kewei. Schedule Of Other Related Party [Axis] Schedule Of Other Related Party [Axis] Schedule of other related party. Schedule Of Other Related Party [Domain] Schedule Of Other Related Party [Domain] Schedule of other related party. Certain Other Parties [Member] Certain Other Parties [Member] Certain other parties. Relationships and Transactions With Certain Other Parties [Abstract] Relationships and transactions with certain other parties Relationships and transactions with certain other parties. Transactions and Amounts Outstanding With Certain Other Parties [Abstract] Transactions and amounts outstanding with certain other parties Transactions and amounts outstanding with certain other parties. Revenue from Related Parties Sales of products (e) Related parties Related Party Transaction Purchase Of Raw Material Purchase of transportation services Purchase of raw materials (f) Purchases of raw material during the period with related party. Related Party Transaction Credit Line Of Guarantee Provision For Bank Borrowings Guarantee for bank borrowings (g) Credit line of guarantee provision for bank borrowings Related Party Transaction, Credit line of guarantee provision for bank borrowings. Amounts due to related parties Advance payments to these parties (i) Amounts due to related parties Due to Related Parties, Current, Total Amounts due to related parties Ningbo Lide [Member] Guarantees For Bank Loans, Other Related Parties [Abstract] Guarantees for bank loans from other certain parties Guarantees for Bank Loans, Other related parties. Other Related Parties Guarantee Provided Guarantee provided during the period Other related parties guarantee provided. Other Related Parties Bank Loan Guaranteed Bank loans guaranteed Other related parties bank loan guaranteed. Ningbo Kunde Other Parties [Member] Ningbo Kunde Other Parties [Member] Ningbo Kunde Other Parties. Ningbo Kewei Other Parties [Member] Ningbo Kewei Other Parties [Member] Ningbo Kewei Other Parties. Ningbo Litong Petrochemical Company Limited [Member] Ningbo Litong [Member] Ningbo Litong Petrochemical Co Ltd. Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual) [Abstract] Related Party Transactions and Relationships and Transactions With Certain Other Parties (Textual) Related Party Transactions And Relationships And Transactions With Certain Other Parties. Outstanding Advances From Related Parties Outstanding advances from related parties Outstanding advances from related parties. Related Party Transaction Purchase Of Transportation Services Purchase of transportation services (a) Purchase of transportation services (e) Purchases of transportation services during the period with related party. Percentage Of Guarantee Fee Of Loan Principal Guarantee fee as a percentage of loan principal Percentage of guarantee fee of loan principal. Amounts due to these parties Amounts due to these parties (h) Amounts due to these parties (g) Due from Other Related Parties, Current Advances from these parties for sales Amounts due from these parties Advance Payments To Related Party Payments in advance to related party Payments in advance to related party. Schedule of Segment Reporting Information, by Segment [Table] Business Segments [Axis] Segment [Domain] Petrochemicals [Member] Petrochemicals. Rubbers [Member] Rubbers [Member] Rubbers. Corporate [Member] Corporate [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Abstract] Summary of selected information in segment structure Consolidated Segment Data Textual [Abstract] Consolidated Segment Data (Textual) Number of Operating Segments Number of operating segments