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Significant Accounting Policies - Additional information (Details) ¥ / shares in Units, ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 CNY (¥) segment agreement ¥ / shares | Dec. 31, 2022 USD ($) segment agreement | Dec. 31, 2021 CNY (¥) agreement | Dec. 31, 2020 CNY (¥) agreement | Dec. 31, 2022 USD ($)
Significant Accounting Policies |  |  |  |  |
Cash and cash equivalents | ¥ 568,192 |  | ¥ 533,293 |  | $ 82,400
Total percentage of cash and cash equivalents | 73.20% |  | 44.60% |  | 73.20%
Number of lien arrangements | agreement | 0 | 0 | 0 | 0 |
Restricted cash | ¥ 10,323 |  | ¥ 4,155 |  | $ 1,497
Investment income from its short term investments | 2,200 |  | 500 | ¥ 1,200 |
Impairment charges | ¥ 0 |  | ¥ 0 | ¥ 0 |
Weighted average contract period | 121 days | 121 days | 117 days | 124 days |
Recognized revenue | ¥ 12,500 |  | ¥ 11,000 | ¥ 9,900 |
Revenue remaining performance obligation | 0 |  | 0 | 0 |
Advertising and promotional expenses | 228,200 |  | 360,200 | 127,400 |
Lease liabilities | 26,567 |  | 31,005 |  |
Lease liabilities due within one year | 18,372 |  | 13,929 |  | 2,664
Lease liabilities | 8,195 |  | 17,076 |  | $ 1,188
Finance lease | 0 |  | 0 |  |
Unrecognized uncertain tax positions | ¥ 0 |  | 0 | 0 |
Exchange rate | 6.8972 |  |  |  | 6.8972
Income tax examination likelihood of settlement | The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement. | The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement. |  |  |
Annual Appropriation To Reserve Percent | 10.00% |  |  |  | 10.00%
Threshold limit for reserve appropriation | 50.00% |  |  |  | 50.00%
Number of Operating Segments | segment | 1 | 1 |  |  |
Number of Reportable Segments | segment | 1 | 1 |  |  |
Exercise price of fair value grant date price | ¥ / shares | ¥ 0 |  |  |  |
Share-based compensation expense | ¥ 29,233 | $ 4,238 | ¥ 37,359 | 50,741 |
11 financial institutions |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Percentage of cash and cash equivalents held financial institution |  |  | 49.00% |  |
12 financial institutions |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Percentage of short term investments held financial institution | 64.00% | 64.00% |  |  |
Single financial institution |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Percentage of cash and cash equivalents held financial institution |  |  | 18.00% |  |
Percentage of short term investments held financial institution | 26.00% | 26.00% |  |  |
PRC Contribution Plan |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Employee benefit expenses | ¥ 53,900 |  | ¥ 57,200 | 38,500 |
Statutory reserves |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Appropriation to statutory reserves | 529 |  | 0 | ¥ 0 |
Alipay and WeChat Pay |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Cash and cash equivalents | 8,600 |  | 11,300 |  |
Subsidiaries |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Cash and cash equivalents | 415,600 |  | ¥ 237,800 |  |
Bank balance |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Restricted cash | 10,300 |  |  |  |
Credit cards and overseas operating lease |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Restricted cash | 2,500 |  |  |  |
Local authorities |  |  |  |  |
Significant Accounting Policies |  |  |  |  |
Restricted cash | ¥ 7,800 |  |  |  |

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