995200100 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS Calc2 link:presentationLink link:calculationLink link:definitionLink 995200200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 995200400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - ACCOUNTS RECEIVABLE, NET (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - ACCOUNTS RECEIVABLE, NET (Details) link:presentationLink link:calculationLink link:definitionLink 99940501 - Disclosure - INVENTORIES (Details) link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS, NET (Details) link:presentationLink link:calculationLink link:definitionLink 99940701 - Disclosure - PROPERTY AND EQUIPMENT, NET (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - OTHER NON-CURRENT ASSETS, NET (Details) link:presentationLink link:calculationLink link:definitionLink 40902 - Disclosure - SHORT-TERM AND LONG-TERM BANK BORROWINGS - Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Detail) link:presentationLink link:calculationLink link:definitionLink 99941703 - Disclosure - TAXATION - Reconciliation of tax (Details) link:presentationLink link:calculationLink link:definitionLink 99941704 - Disclosure - TAXATION - Components of deferred tax assets/(liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 99941901 - Disclosure - LEASES - Supplemental balance sheet information related to operating lease (Details) link:presentationLink link:calculationLink link:definitionLink 99941903 - Disclosure - LEASES - Components of lease cost (Details) link:presentationLink link:calculationLink link:definitionLink 99942202 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed statements of comprehensive income (Details) link:presentationLink link:calculationLink link:definitionLink 995200090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 995200105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200205 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200300 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 99931603 - Disclosure - SHARE BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99940101 - Disclosure - ORGANIZATION (Details) link:presentationLink link:calculationLink link:definitionLink 99940102 - Disclosure - ORGANIZATION - Consolidated VIE Structured by the Contractual Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 99940202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and equipment (Details) link:presentationLink link:calculationLink link:definitionLink 99940203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of long-lived assets other than goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 99940204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue recognition (Details) link:presentationLink link:calculationLink link:definitionLink 99940205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Sales and marketing expenses and General and administrative expenses ,Income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 99940206 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Losses and expenses related to Fabricated Transactions and Restructuring (Details) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - PRINCIPAL RISKS (Details) link:presentationLink link:calculationLink link:definitionLink 99940401 - Disclosure - ACCOUNTS RECEIVABLE, NET (Details) link:presentationLink link:calculationLink link:definitionLink 99940901 - Disclosure - SHORT-TERM AND LONG-TERM BANK BORROWINGS (Details) link:presentationLink link:calculationLink link:definitionLink 99941101 - Disclosure - RELATED PARTY TRANSACTIONS - Significant related party transactions (Details) link:presentationLink link:calculationLink link:definitionLink 99941102 - Disclosure - RELATED PARTY TRANSACTIONS - Related Party Balances (Details) link:presentationLink link:calculationLink link:definitionLink 99941301 - Disclosure - CONVERTIBLE SENIOR NOTES (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - ORDINARY SHARES (Details) link:presentationLink link:calculationLink link:definitionLink 99941501 - Disclosure - SENIOR PREFERRED SHARES (Details) link:presentationLink link:calculationLink link:definitionLink 99941601 - Disclosure - SHARE BASED COMPENSATION (Details) link:presentationLink link:calculationLink link:definitionLink 99941602 - Disclosure - SHARE BASED COMPENSATION - Expenses were allocated in operating expenses by function (Details) link:presentationLink link:calculationLink link:definitionLink 99941603 - Disclosure - SHARE BASED COMPENSATION - Options granted to employees (Details) link:presentationLink link:calculationLink link:definitionLink 99941701 - Disclosure - TAXATION - Enterprise income tax ("EIT") (Details) link:presentationLink link:calculationLink link:definitionLink 99941702 - Disclosure - TAXATION - The components of (loss)/income before tax (Details) link:presentationLink link:calculationLink link:definitionLink 99941801 - Disclosure - NET INCOME PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 99941902 - Disclosure - LEASES - The weighted average remaining lease terms and discount rates (Details) link:presentationLink link:calculationLink link:definitionLink 99942002 - Disclosure - SEGMENT REPORTING - Operating income from segment (Details) link:presentationLink link:calculationLink link:definitionLink 99942003 - Disclosure - SEGMENT REPORTING - Net revenues (Details) link:presentationLink link:calculationLink link:definitionLink 99942004 - Disclosure - SEGMENT REPORTING - Consolidated Operating income (Details) link:presentationLink link:calculationLink link:definitionLink 99942005 - Disclosure - SEGMENT REPORTING - Assets (Details) link:presentationLink link:calculationLink link:definitionLink 99942101 - Disclosure - COMMITMENTS AND CONTINGENCIES - Capital commitments (Details) link:presentationLink link:calculationLink link:definitionLink 99942102 - Disclosure - COMMITMENTS AND CONTINGENCIES - Contingency (Details) link:presentationLink link:calculationLink link:definitionLink 99942201 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed balance sheets (Details) link:presentationLink link:calculationLink link:definitionLink 99942203 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed statements of cash flows (Details) link:presentationLink link:calculationLink link:definitionLink 99942301 - Disclosure - SUBSEQUENT EVENT (Details) link:presentationLink link:calculationLink link:definitionLink 995210101 - Disclosure - ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - PRINCIPAL RISKS link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - ACCOUNTS RECEIVABLE, NET link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - INVENTORIES link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS, NET link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - PROPERTY AND EQUIPMENT, NET link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - OTHER NON-CURRENT ASSETS, NET link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - SHORT-TERM AND LONG-TERM BANK BORROWINGS link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - RESTRICTED NET ASSETS link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - CONVERTIBLE SENIOR NOTES link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - ORDINARY SHARES link:presentationLink link:calculationLink link:definitionLink 995211501 - Disclosure - SENIOR PREFERRED SHARES link:presentationLink link:calculationLink link:definitionLink 995211601 - Disclosure - SHARE BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 995211701 - Disclosure - TAXATION link:presentationLink link:calculationLink link:definitionLink 995211801 - Disclosure - NET INCOME PER SHARE link:presentationLink link:calculationLink link:definitionLink 995211901 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 995212001 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 995212101 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 995212201 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION link:presentationLink link:calculationLink link:definitionLink 995212301 - Disclosure - SUBSEQUENT EVENT link:presentationLink link:calculationLink link:definitionLink 99920202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 99930103 - Disclosure - ORGANIZATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99930203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930403 - Disclosure - ACCOUNTS RECEIVABLE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 99930503 - Disclosure - INVENTORIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 99930803 - Disclosure - OTHER NON-CURRENT ASSETS, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 99930903 - Disclosure - SHORT-TERM AND LONG-TERM BANK BORROWINGS (Tables) link:presentationLink link:calculationLink link:definitionLink 99931003 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99931103 - Disclosure - RELATED PARTY TRANSACTIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 99931703 - Disclosure - TAXATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99931803 - Disclosure - NET INCOME PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 99931903 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 99932003 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 99932103 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99932203 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99940201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Convenience translation, Restricted cash, Accounts receivable and Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 99940207 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Government subsidies and Income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 99940208 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Employee benefit expenses and Segment reporting (Details) link:presentationLink link:calculationLink link:definitionLink 99940902 - Disclosure - SHORT-TERM AND LONG-TERM BANK BORROWINGS - Maturities of all short-term borrowing and long-term borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 99941201 - Disclosure - RESTRICTED NET ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 99941705 - Disclosure - TAXATION - Unrecognized tax position (Details) link:presentationLink link:calculationLink link:definitionLink 99941904 - Disclosure - LEASES - Future minimum lease payments (Details) link:presentationLink link:calculationLink link:definitionLink 99942001 - Disclosure - SEGMENT REPORTING (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink