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Disclosure - BORROWINGS - Components (Details) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - BORROWINGS - Future maturities of short term borrowings and long term borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - SEGMENT INFORMATION - Research and development (Details) link:presentationLink link:calculationLink link:definitionLink 41504 - Disclosure - LEASES - Maturities of lease liabilities (Details) Calc 2 link:presentationLink link:calculationLink link:definitionLink 41602 - Disclosure - LEASES - Information related to operating lease activity (Details) link:presentationLink link:calculationLink link:definitionLink 41603 - Disclosure - LEASES - Maturities of lease liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00205 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - ORGANIZATION AND BASIS OF PRESENTATION (Details) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, equipment and software (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of credit risk (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - BORROWINGS - Short term borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 40703 - Disclosure - BORROWINGS - Long term borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - 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Disclosure - ORDINARY SHARES (Details) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - ORGANIZATION AND BASIS OF PRESENTATION link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - ACCOUNTS RECEIVABLE, NET link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - PREPAYMENTS AND OTHER CURRENT ASSETS link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - PROPERTY, EQUIPMENT AND SOFTWARE, NET link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - ACCRUALS AND OTHER CURRENT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - BORROWINGS link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - CONTINGENTLY REDEEMABLE CONVERTIBLE PREFERRED SHARES link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - SHARE-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - WARRANT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - COLLABORATION ARRANGEMENTS link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - INCOME TAX BENFIT (EXPENSE) link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - NET LOSS PER SHARE link:presentationLink link:calculationLink link:definitionLink 11501 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 11601 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 11701 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 11801 - Disclosure - ORDINARY SHARES link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 30103 - Disclosure - ORGANIZATION AND BASIS OF PRESENTATION (Tables) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - ACCOUNTS RECEIVABLE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - PREPAYMENTS AND OTHER CURRENT ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - PROPERTY, EQUIPMENT AND SOFTWARE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - ACCRUALS AND OTHER CURRENT LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - 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Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Short-term investments, Impairment of long lived assets and Employee defined contribution plan (Details) link:presentationLink link:calculationLink link:definitionLink 40205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Government subsidies and Foreign currency exchange rate risk (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - SEGMENT INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - CONTINGENTLY REDEEMABLE CONVERTIBLE PREFERRED SHARES (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - SHARE-BASED COMPENSATION - Share Option Activities (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - SHARE-BASED COMPENSATION - Share Option Activities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - 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