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Taxation - Sales tax (Details)
12 Months Ended 42 Months Ended
Jun. 30, 2019
Dec. 31, 2022
Dec. 31, 2022
Services rendered      
Sales tax      
Value added tax rate (as a percent)   6.00%  
Goods sold      
Sales tax      
Value added tax rate (as a percent)   13.00%  
Advertising and marketing revenues      
Sales tax      
Culture business construction fee percentage 3.00%   1.50%
Culture business construction fee rate date up to which the prevailing rate is applicable   Dec. 31, 2024