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Intangible assets, net - Schedule of Weighted Average Amortization Periods of Intangible Assets (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Total weighted average amortization periods 10 years 10 years
Land use rights    
Finite-Lived Intangible Assets [Line Items]    
Total weighted average amortization periods 30 years 30 years
Acquired computer software    
Finite-Lived Intangible Assets [Line Items]    
Total weighted average amortization periods 5 years 5 years
Audio-visual license    
Finite-Lived Intangible Assets [Line Items]    
Total weighted average amortization periods 9 years 9 years