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Disclosure - MANDATORILY REDEEMABLE NONCONTROLLING INTEREST - Roll forward (Details) link:presentationLink link:calculationLink link:definitionLink 21242305 - Disclosure - INCOME TAX -Valuation allowance (Details) link:presentationLink link:calculationLink link:definitionLink 21242401 - Disclosure - NET LOSS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 21242701 - Disclosure - SHARE-BASED COMPENSATION - Schedule of share options activities (Details) link:presentationLink link:calculationLink link:definitionLink 21242802 - Disclosure - COMMITMENTS AND CONTINGENCIES - Capital commitment (Details) link:presentationLink link:calculationLink link:definitionLink 2210101 - Disclosure - DESCRIPTION OF BUSINESS AND ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 2210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 2210301 - Disclosure - ACCOUNT RECEIVABLES - THIRD PARTIES, NET link:presentationLink link:calculationLink link:definitionLink 2210401 - Disclosure - INVENTORIES link:presentationLink link:calculationLink link:definitionLink 2210501 - Disclosure - PREPAYMENTS AND OTHER CURRENT ASSETS - THIRD PARTIES link:presentationLink link:calculationLink link:definitionLink 2210601 - Disclosure - PROPERTY, EQUIPMENT AND SOFTWARE, NET link:presentationLink link:calculationLink link:definitionLink 2210701 - Disclosure - INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 2210801 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 2210901 - Disclosure - OTHER NON-CURRENT ASSETS - THIRD PARTIES link:presentationLink link:calculationLink link:definitionLink 2211001 - Disclosure - SHORT-TERM BORROWINGS - THIRD PARTIES link:presentationLink link:calculationLink link:definitionLink 2211101 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - THIRD PARTIES link:presentationLink link:calculationLink link:definitionLink 2211201 - Disclosure - PUT OPTION LIABILITIES link:presentationLink link:calculationLink link:definitionLink 2211301 - Disclosure - Warrant liabilities link:presentationLink link:calculationLink link:definitionLink 2211401 - Disclosure - Meritz Investments link:presentationLink link:calculationLink link:definitionLink 2211501 - Disclosure - EXCHANGEABLE NOTES link:presentationLink link:calculationLink link:definitionLink 2211601 - Disclosure - CONVERTIBLE NOTES link:presentationLink link:calculationLink link:definitionLink 2211701 - Disclosure - DEFERRED INCOME link:presentationLink link:calculationLink link:definitionLink 2211801 - Disclosure - REDEEMABLE CONVERTIBLE PREFERRED SHARES link:presentationLink link:calculationLink link:definitionLink 2211901 - Disclosure - OTHER NON-CURRENT LIABILITIES - THIRD PARTIES link:presentationLink link:calculationLink link:definitionLink 2212001 - Disclosure - ORDINARY SHARES link:presentationLink link:calculationLink link:definitionLink 2212101 - Disclosure - INCOME TAX link:presentationLink link:calculationLink link:definitionLink 2212201 - Disclosure - NET LOSS PER SHARE link:presentationLink link:calculationLink link:definitionLink 2212301 - Disclosure - REVENUES link:presentationLink link:calculationLink link:definitionLink 2212401 - Disclosure - FAIR VALUE MEASUREMENT link:presentationLink link:calculationLink link:definitionLink 2212501 - Disclosure - SHARE-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 2212601 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 2212701 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 2212801 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 2220202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 2230203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2230303 - Disclosure - ACCOUNT RECEIVABLES - THIRD PARTIES, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 2230403 - Disclosure - INVENTORIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2230503 - Disclosure - PREPAYMENTS AND OTHER CURRENT ASSETS - THIRD PARTIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2230603 - Disclosure - PROPERTY, EQUIPMENT AND SOFTWARE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 2230703 - Disclosure - INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 2230803 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 2230903 - Disclosure - OTHER NON-CURRENT ASSETS - THIRD PARTIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2231003 - Disclosure - SHORT-TERM BORROWINGS - THIRD PARTIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2231103 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - THIRD PARTIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2231703 - Disclosure - DEFERRED INCOME (Tables) link:presentationLink link:calculationLink link:definitionLink 2231803 - Disclosure - REDEEMABLE CONVERTIBLE PREFERRED SHARES (Tables) link:presentationLink link:calculationLink link:definitionLink 2231903 - Disclosure - OTHER NON-CURRENT LIABILITIES - THIRD PARTIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2232203 - Disclosure - NET LOSS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 2232303 - Disclosure - REVENUES (Tables) link:presentationLink link:calculationLink link:definitionLink 2232403 - Disclosure - FAIR VALUE MEASUREMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 2232503 - Disclosure - SHARE-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 2232603 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2232703 - Disclosure - RELATED PARTY TRANSACTIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 2240203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Warranties (Details) link:presentationLink link:calculationLink link:definitionLink 2240804 - Disclosure - LEASES - Weighted-average remaining lease term and discount rate (Details) link:presentationLink link:calculationLink link:definitionLink 2241301 - Disclosure - Warrant liabilities - Schedule of warrant liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2242201 - Disclosure - NET LOSS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 2242501 - Disclosure - SHARE-BASED COMPENSATION - Schedule of share options activities (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink