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Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed balance sheets (Details) link:presentationLink link:calculationLink link:definitionLink 42402 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed balance sheets (parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 42403 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed statements of comprehensive income (Details) link:presentationLink link:calculationLink link:definitionLink 42404 - Disclosure - PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed statements of cash flows (Details) link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - ORGANIZATION AND DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - 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Functional currency and foreign currency translation (Details) link:presentationLink link:calculationLink link:definitionLink 40207 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Segment reporting (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - ACCOUNTS RECEIVABLE, NET - Allowance for credit losses (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - PREPAYMENTS, NET - Impairment loss (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - DEPOSITS AND OTHER ASSETS, NET - Allowance of credit losses (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - SHORT-TERM BANK LOANS (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - LEASE - Supplemental cash flow information (Details) link:presentationLink link:calculationLink link:definitionLink 41303 - Disclosure - LEASE (Details) link:presentationLink link:calculationLink link:definitionLink 41407 - 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