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Related Party Balances and Transactions - Acceptance of advertising and IT support services (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services | ¥ 8,984 | ¥ 5,222 | ¥ 138,497
Tianjin Boyou Information Technology Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services | ¥ 8,984 | 217 | 1,594
Beijing Bit Ep Information Technology Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services |  | 4,533 | 4,159
Beijing Yiche Interactive Advertising Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services |  | ¥ 472 |
Beijing Chehui Hudong Guanggao Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services |  |  | 92,356
Beijing Xinyi Hudong Guanggao Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services |  |  | 39,919
Beijing Yiche Information Science and Technology Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services |  |  | 280
Shanghai Yiju Information Technology Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services |  |  | 142
Bite Shijie (Beijing) Keji Co., Ltd. |  |  |
Related Party Balances and Transactions |  |  |
Acceptance of advertising and IT support services |  |  | ¥ 47

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