99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink 995200100 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 995200200 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS link:presentationLink link:calculationLink link:definitionLink 995200400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 99940102 - Disclosure - DESCRIPTION OF ORGANIZATION AND PRINCIPAL ACTIVITIES - Group's VIE information (Details) link:presentationLink link:calculationLink link:definitionLink 99940204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Restricted cash (Details) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - ACCOUNTS RECEIVABLE, NET - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 99940401 - Disclosure - INVENTORIES (Details) link:presentationLink link:calculationLink link:definitionLink 99940501 - Disclosure - PREPAYMENTS AND OTHER CURRENT ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 99940701 - Disclosure - OTHER NON-CURRENT ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 99941101 - Disclosure - OTHER NON-CURRENT LIABILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 99941402 - Disclosure - INCOME TAX - Components of loss before income taxes and withholding tax on undistributed dividends (Details) link:presentationLink link:calculationLink link:definitionLink 99941403 - Disclosure - INCOME TAX - Income tax benefit (Details) link:presentationLink link:calculationLink link:definitionLink 99941404 - Disclosure - INCOME TAX - Reconciliation of differences between PRC statutory income tax rate and effective income tax rate (Details) link:presentationLink link:calculationLink link:definitionLink 99941406 - Disclosure - INCOME TAX - Deferred income tax assets and deferred income tax liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 99941407 - Disclosure - INCOME TAX - Operating loss carry forwards (Details) link:presentationLink link:calculationLink link:definitionLink 99941501 - Disclosure - NET LOSS PER ORDINARY SHARE - Basic and diluted net income (loss) per share computation (Details) link:presentationLink link:calculationLink link:definitionLink 99941702 - Disclosure - OPERATING LEASES - Supplemental information related to operating leases (Details) link:presentationLink link:calculationLink link:definitionLink 99941703 - Disclosure - OPERATING LEASES - Maturities of lease liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 99941901 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 99941902 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed Statements of Results of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 42099 - Disclosure - OPERATING LEASES - Maturities of lease liabilities (Details) (Calc2) 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 995200300 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 99931303 - Disclosure - SHARE-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99940202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash and cash equivalents (Details) link:presentationLink link:calculationLink link:definitionLink 99940203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Term deposits (Details) link:presentationLink link:calculationLink link:definitionLink 99940205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Short-term investments (Details) link:presentationLink link:calculationLink link:definitionLink 99940206 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, plant and equipment, net (Details) link:presentationLink link:calculationLink link:definitionLink 99940207 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Leases, Impairment of long-lived assets (Details) link:presentationLink link:calculationLink link:definitionLink 99940208 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Value added taxes, Revenue recognition (Details) link:presentationLink link:calculationLink link:definitionLink 40208 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Value added taxes, Revenue recognition Default (Details) link:presentationLink link:calculationLink link:definitionLink 99940209 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 99940211 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration and risk (Details) link:presentationLink link:calculationLink link:definitionLink 99940602 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET - Depreciation expense (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - SHORT-TERM BANK BORROWINGS (Details) link:presentationLink link:calculationLink link:definitionLink 99940802 - Disclosure - SHORT-TERM BANK BORROWINGS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 99940901 - Disclosure - NOTES PAYABLE (Details) link:presentationLink link:calculationLink link:definitionLink 99941002 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Warranty terms (Details) link:presentationLink link:calculationLink link:definitionLink 99941003 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Movement of provision (Details) link:presentationLink link:calculationLink link:definitionLink 99941201 - Disclosure - ORDINARY SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 99941301 - Disclosure - SHARE-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 99941302 - Disclosure - SHARE-BASED COMPENSATION - Share option activities (Details) link:presentationLink link:calculationLink link:definitionLink 99941303 - Disclosure - SHARE-BASED COMPENSATION - Restricted share units activities (Details) link:presentationLink link:calculationLink link:definitionLink 99941304 - Disclosure - SHARE-BASED COMPENSATION - Compensation costs (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - INCOME TAX - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 99941502 - Disclosure - NET LOSS PER ORDINARY SHARE - Antidilutive securities (Details) link:presentationLink link:calculationLink link:definitionLink 99941601 - Disclosure - REVENUE INFORMATION - Disaggregation of revenue (Details) link:presentationLink link:calculationLink link:definitionLink 99941602 - Disclosure - REVENUE INFORMATION - Revenues based on geographic areas (Details) link:presentationLink link:calculationLink link:definitionLink 99941903 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed Statements of Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 995200205 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200305 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995210101 - Disclosure - DESCRIPTION OF ORGANIZATION AND PRINCIPAL ACTIVITIES link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - ACCOUNTS RECEIVABLE, NET link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - INVENTORIES link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - PREPAYMENTS AND OTHER CURRENT ASSETS link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - OTHER NON-CURRENT ASSETS link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - SHORT-TERM BANK BORROWINGS link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - NOTES PAYABLE link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - OTHER NON-CURRENT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - ORDINARY SHARE link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - SHARE-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - INCOME TAX link:presentationLink link:calculationLink link:definitionLink 995211501 - Disclosure - NET LOSS PER ORDINARY SHARE link:presentationLink link:calculationLink link:definitionLink 995211601 - Disclosure - REVENUE INFORMATION link:presentationLink link:calculationLink link:definitionLink 995211701 - Disclosure - OPERATING LEASES link:presentationLink link:calculationLink link:definitionLink 995211801 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 995211901 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION link:presentationLink link:calculationLink link:definitionLink 99920202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 99930103 - Disclosure - DESCRIPTION OF ORGANIZATION AND PRINCIPAL ACTIVITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930303 - Disclosure - ACCOUNTS RECEIVABLE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 99930403 - Disclosure - INVENTORIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99930503 - Disclosure - PREPAYMENTS AND OTHER CURRENT ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - OTHER NON-CURRENT ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 99930803 - Disclosure - SHORT-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 - OTHER NON-CURRENT LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 99931403 - Disclosure - INCOME TAX (Tables) link:presentationLink link:calculationLink link:definitionLink 99931503 - Disclosure - NET LOSS PER ORDINARY SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 99931603 - Disclosure - REVENUE INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99931703 - Disclosure - OPERATING LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 99931903 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 99940101 - Disclosure - DESCRIPTION OF ORGANIZATION AND PRINCIPAL ACTIVITIES - Principal terms of VIE Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 99940201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Convenience translation (Details) link:presentationLink link:calculationLink link:definitionLink 99940210 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Selling and Marketing Expenses, Government Grants, Employee Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 99940212 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Segment Reporting (Details) link:presentationLink link:calculationLink link:definitionLink 99940213 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Restricted Net Assets (Details) link:presentationLink link:calculationLink link:definitionLink 99940302 - Disclosure - ACCOUNTS RECEIVABLE, NET - Movement of the allowance for doubtful accounts (Details) link:presentationLink link:calculationLink link:definitionLink 99941405 - Disclosure - INCOME TAX - Income taxes paid (Details) link:presentationLink link:calculationLink link:definitionLink 99941408 - Disclosure - INCOME TAX - Changes in valuation allowance (Details) link:presentationLink link:calculationLink link:definitionLink 99941409 - Disclosure - INCOME TAX - PRC Tax Administration and Collection Law (Details) link:presentationLink link:calculationLink link:definitionLink 99941701 - Disclosure - OPERATING LEASES - Summary (Details) link:presentationLink link:calculationLink link:definitionLink