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Disclosure - Income taxes - Accumulated tax losses carryforwards (Details) link:presentationLink link:calculationLink link:definitionLink 42001 - Disclosure - Share-based compensation - Summary of the Group's share based compensation expense (Details) link:presentationLink link:calculationLink link:definitionLink 42002 - Disclosure - Share-based compensation - Share incentive plan, modification (Details) link:presentationLink link:calculationLink link:definitionLink 42004 - Disclosure - Share-based compensation - pricing assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 42005 - Disclosure - Share-based compensation - Summary of activities of restricted shares and RSUs (Details) link:presentationLink link:calculationLink link:definitionLink 42006 - Disclosure - Share-based compensation - Restricted shares and RSUs (Details) link:presentationLink link:calculationLink link:definitionLink 42007 - Disclosure - Share-based compensation - Voyager's share based awards (Details) link:presentationLink link:calculationLink link:definitionLink 42101 - 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