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Income Tax Expenses - Per Share Effect of Tax Holidays (Details) - ¥ / shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
Net income per share effect – basic | ¥ 0.02 | ¥ 0.14 | ¥ 0.13
Net income per share effect – diluted | ¥ 0.02 | ¥ 0.13 | ¥ 0.13

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- Definition Income tax holiday income tax benefits per share diluted. + References No definition available. + Details
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