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Disclosure - Summary of significant accounting policies - Schedule of fair value and the non-recurring losses due to impairment of the related assets (Details) link:presentationLink link:calculationLink link:definitionLink 99940301 - Disclosure - Accounts receivable, net - Schedule of accounts receivable, net (Details) link:presentationLink link:calculationLink link:definitionLink 99940401 - Disclosure - Other current assets - Schedule of other current assets (Details) link:presentationLink link:calculationLink link:definitionLink 99940502 - Disclosure - Property and equipment, net - Schedule of property and equipment, net (Details) link:presentationLink link:calculationLink link:definitionLink 99940604 - Disclosure - Intangible assets, net - Schedule of future amortization expense (Details) link:presentationLink link:calculationLink link:definitionLink 99940801 - Disclosure - Accrued expenses and other current liabilities - Schedule of accrued expenses and other current liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 99941001 - Disclosure - Other operating income (expenses), net (Details) link:presentationLink link:calculationLink link:definitionLink 99941103 - Disclosure - Income taxes - Schedule of reconciliation between statutory rate and the Group's effective tax rate (Details) link:presentationLink link:calculationLink link:definitionLink 99941104 - Disclosure - Income taxes - Schedule of deferred tax assets (Details) link:presentationLink link:calculationLink link:definitionLink 99941801 - Disclosure - Leases - Summary of lease expense (Details) link:presentationLink link:calculationLink link:definitionLink 99941803 - Disclosure - Leases - Summary of future minimum lease payments under non-cancellable operating lease agreements (Details) link:presentationLink link:calculationLink link:definitionLink 41803 - Disclosure - Leases - Summary of future minimum lease payments under non-cancellable operating lease agreements (Details) Calc 2 link:presentationLink link:calculationLink link:definitionLink 99942101 - Schedule - SCHEDULE I-ADDITIONAL INFORMATION OF THE PARENT COMPANY - CONDENSED BALANCE SHEETS (Details) link:presentationLink link:calculationLink link:definitionLink 99942102 - Schedule - SCHEDULE I-ADDITIONAL INFORMATION OF THE PARENT COMPANY - CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Details) link:presentationLink link:calculationLink link:definitionLink 995200090 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 995200105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200205 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995200300 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 99920202 - Disclosure - Summary of significant accounting policies (Policies) 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 99940101 - Disclosure - Organization and principal activities - Schedule of principal subsidiaries and VIEs (Details) link:presentationLink link:calculationLink link:definitionLink 99940202 - Disclosure - Summary of significant accounting policies - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 99940203 - Disclosure - Summary of significant accounting policies - Schedule of quoted market prices to determine the fair value of an asset or liability (Details) link:presentationLink link:calculationLink link:definitionLink 99940205 - Disclosure - Summary of significant accounting policies - Schedule of property and equipment, net estimated useful lives (Details) link:presentationLink link:calculationLink link:definitionLink 99940206 - Disclosure - Summary of significant accounting policies - Schedule of intangible assets, net estimated useful lives (Details) link:presentationLink link:calculationLink link:definitionLink 99940207 - Disclosure - Summary of significant accounting policies - Schedule of disaggregation of revenue (Details) link:presentationLink link:calculationLink link:definitionLink 99940208 - Disclosure - Summary of significant accounting policies - Schedule of sales and marketing expenses (Details) link:presentationLink link:calculationLink link:definitionLink 99940601 - Disclosure - Intangible assets, net - Schedule of intangible assets, net (Details) link:presentationLink link:calculationLink link:definitionLink 99940602 - Disclosure - Intangible assets, net - Schedule of intangible assets, net (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 99940603 - Disclosure - Intangible assets, net - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 99940605 - 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Disclosure - Cost of revenues - Schedule of cost of revenue (Details) link:presentationLink link:calculationLink link:definitionLink 99941101 - Disclosure - Income taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 99941102 - Disclosure - Income taxes - Schedule of Income (loss) before income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 99941301 - Disclosure - Share-based compensation - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 99941401 - Disclosure - Net income (loss) per share and net income (loss) attributable to ordinary shareholders (Details) link:presentationLink link:calculationLink link:definitionLink 99941601 - Disclosure - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 99941602 - Disclosure - Segment Information - Operating Segment (Details) link:presentationLink link:calculationLink link:definitionLink 99941701 - 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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 - Other current assets link:presentationLink link:calculationLink link:definitionLink 995210501 - Disclosure - Property and equipment, net link:presentationLink link:calculationLink link:definitionLink 995210601 - Disclosure - Intangible assets, net link:presentationLink link:calculationLink link:definitionLink 995210701 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 995210801 - Disclosure - Accrued expenses and other current liabilities link:presentationLink link:calculationLink link:definitionLink 995210901 - Disclosure - Cost of revenues link:presentationLink link:calculationLink link:definitionLink 995211001 - Disclosure - Other operating income (expenses), net link:presentationLink link:calculationLink link:definitionLink 995211101 - Disclosure - Income taxes link:presentationLink link:calculationLink link:definitionLink 995211201 - Disclosure - Treasury shares link:presentationLink link:calculationLink link:definitionLink 995211301 - Disclosure - Share-based compensation link:presentationLink link:calculationLink link:definitionLink 995211401 - Disclosure - Net income (loss) per share and net income (loss) attributable to ordinary shareholders link:presentationLink link:calculationLink link:definitionLink 995211501 - Disclosure - Statutory reserves and restricted net assets link:presentationLink link:calculationLink link:definitionLink 995211601 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 995211701 - Disclosure - Related party transactions link:presentationLink link:calculationLink link:definitionLink 995211801 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 995211901 - Disclosure - Commitments and contingencies link:presentationLink link:calculationLink link:definitionLink 995212001 - Disclosure - Subsequent events link:presentationLink link:calculationLink link:definitionLink 995212101 - Disclosure - SCHEDULE I-ADDITIONAL INFORMATION OF THE PARENT COMPANY link:presentationLink link:calculationLink link:definitionLink 99930103 - Disclosure - Organization and principal activities (Tables) link:presentationLink link:calculationLink link:definitionLink 99930403 - Disclosure - Other current assets (Tables) link:presentationLink link:calculationLink link:definitionLink 99930503 - Disclosure - Property and equipment, net (Tables) link:presentationLink link:calculationLink link:definitionLink 99930603 - Disclosure - Intangible assets, net (Tables) link:presentationLink link:calculationLink link:definitionLink 99930703 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 99930803 - Disclosure - Accrued expenses and other current liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 99930903 - Disclosure - Cost of revenues (Tables) link:presentationLink link:calculationLink link:definitionLink 99931003 - Disclosure - Other operating income (expenses), net (Tables) link:presentationLink link:calculationLink link:definitionLink 99931103 - Disclosure - Income taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 99931403 - Disclosure - Net income (loss) per share and net income (loss) attributable to ordinary shareholders (Tables) link:presentationLink link:calculationLink link:definitionLink 99931603 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 99931703 - Disclosure - Related party transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 99931803 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 99932103 - Disclosure - SCHEDULE I-ADDITIONAL INFORMATION OF THE PARENT COMPANY (Tables) link:presentationLink link:calculationLink link:definitionLink 99940302 - 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