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Disclosure - Parent company only condensed financial information - CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - Parenthetical (Details) link:presentationLink link:calculationLink link:definitionLink 99941906 - 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 995210101 - Disclosure - Description of the business and organization link:presentationLink link:calculationLink link:definitionLink 995210201 - Disclosure - Significant accounting policies link:presentationLink link:calculationLink link:definitionLink 995210301 - Disclosure - Prepayments and other current assets link:presentationLink link:calculationLink link:definitionLink 995210401 - Disclosure - Property and equipment, net link:presentationLink link:calculationLink link:definitionLink 995210501 - 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