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Prepayments and Other Current Assets - Additional information (Details)
12 Months Ended
Dec. 31, 2019
Long term receivable unrelated party (in year) 2 years
The interest rate of Loan granted to the unrelated party (in percent) 10.00%
Prepaid content licenses | Minimum  
Amortization period (in year) 1 year
Prepaid content licenses | Maximum  
Amortization period (in year) 3 years