Significant Accounting Policies - Concentrations and Risks (Details) |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Jun. 30, 2022
item
customer
|
Jun. 30, 2021
item
|
Dec. 31, 2021
customer
|
|
| Number of advertising and promotional service providers that accounted for more than 10% of the Group's advertising and promotional service | item | 3 | 3 | |
| Number of customers | customer | 2 | 1 | |