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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY ¥ in Thousands, $ in Thousands | CNY (¥) | USD ($) | 2015 and 2018 Share Incentive Plan CNY (¥) shares | Cumulative Effect, Period of Adoption, Adjustment CNY (¥) | Class A Ordinary Shares shares | Class B Ordinary Shares shares | Common Stock Class A Ordinary Shares CNY (¥) shares | Common Stock Class A Ordinary Shares Conversion of Class B ordinary shares into Class A ordinary shares CNY (¥) shares | Common Stock Class B Ordinary Shares CNY (¥) shares | Common Stock Class B Ordinary Shares Conversion of Class B ordinary shares into Class A ordinary shares CNY (¥) shares | Treasury Stock CNY (¥) shares | Additional Paid-in Capital CNY (¥) | Additional Paid-in Capital 2015 and 2018 Share Incentive Plan CNY (¥) | (Accumulated Deficit) Retained Earnings CNY (¥) | (Accumulated Deficit) Retained Earnings Cumulative Effect, Period of Adoption, Adjustment CNY (¥) | Accumulated Other Comprehensive (Loss) Income CNY (¥) | Total Equity Attributable to Shareholders of the Company CNY (¥) | Total Equity Attributable to Shareholders of the Company 2015 and 2018 Share Incentive Plan CNY (¥) | Total Equity Attributable to Shareholders of the Company Cumulative Effect, Period of Adoption, Adjustment CNY (¥) | Non-Controlling Interest CNY (¥)
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balances (in shares) at Dec. 31, 2017 | shares |  |  |  |  | 25,363,636 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances (in shares) at Dec. 31, 2018 | shares |  |  |  |  | 90,200,000 | 117,600,000 | 90,200,000 |  | 117,600,000 |  |  |  |  |  |  |  |  |  |  |
Securities have been converted into Ordinary Shares upon the completion of the Initial Public Offering (in shares) | shares |  |  |  |  | 18,181,818 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balances at Dec. 31, 2018 | ¥ 1,070,865 |  |  |  |  |  | ¥ 5 |  | ¥ 7 |  |  | ¥ 1,193,174 |  | ¥ (95,527) |  | ¥ (29,786) | ¥ 1,067,873 |  |  | ¥ 2,992
Balances (in shares) at Dec. 31, 2019 | shares |  |  |  |  | 98,444,732 | 110,850,000 | 98,444,732 |  | 110,850,000 |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to the Company and a non-controlling interest shareholder | 293,830 |  |  |  |  |  |  |  |  |  |  |  |  | 292,170 |  |  | 292,170 |  |  | 1,660
Share-based compensation related to Share Incentive Plan |  |  | ¥ 43,168 |  |  |  |  |  |  |  |  |  | ¥ 43,168 |  |  |  |  | ¥ 43,168 |  |
Securities converted into Ordinary Shares upon the completion of the Initial Public Offering |  |  |  |  |  |  |  | ¥ 1 |  | ¥ (1) |  |  |  |  |  |  |  |  |  |
Securities have been converted into Ordinary Shares upon the completion of the Initial Public Offering (in shares) | shares |  |  |  |  | 6,750,000 |  |  | 6,750,000 |  | (6,750,000) |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares for exercised share options | 1,741 |  |  |  |  |  |  |  |  |  |  | 1,741 |  |  |  |  | 1,741 |  |  |
Issuance of ordinary shares for exercised share options (in shares) | shares |  |  | 1,494,732 |  | 1,494,732 |  | 1,494,732 |  |  |  |  |  |  |  |  |  |  |  |  |
Capital injection in a subsidiary from a non-controlling interest shareholder | 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000
Purchase of non-controlling interests | (2,196) |  |  |  |  |  |  |  |  |  |  | (196) |  |  |  |  | (196) |  |  | (2,000)
Special dividends declared to ordinary shareholders | (46,602) |  |  |  |  |  |  |  |  |  |  | (46,602) |  |  |  |  | (46,602) |  |  |
Appropriation to statutory reserves |  |  |  |  |  |  |  |  |  |  |  | 1,047 |  | (1,047) |  |  |  |  |  |
Foreign currency translation adjustment | 10,641 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,641 | 10,641 |  |  |
Balances at Dec. 31, 2019 | ¥ 1,374,447 |  |  | ¥ (2,405) |  |  | ¥ 6 |  | ¥ 6 |  |  | 1,192,332 |  | 195,596 | ¥ (2,405) | (19,145) | 1,368,795 |  | ¥ (2,405) | 5,652
Balances (in shares) at Dec. 31, 2020 | shares |  |  |  |  | 104,163,686 | 103,554,546 | 104,163,686 |  | 103,554,546 |  | 4,232,169 |  |  |  |  |  |  |  |  |
Accounting Standards Update [Extensible List] | ASU No. 2016-13 | ASU No. 2016-13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to the Company and a non-controlling interest shareholder | ¥ 174,446 |  |  |  |  |  |  |  |  |  |  |  |  | 173,324 |  |  | 173,324 |  |  | 1,122
Share-based compensation related to Share Incentive Plan |  |  | ¥ 72,203 |  |  |  |  |  |  |  |  |  | 72,203 |  |  |  |  | 72,203 |  |
Securities have been converted into Ordinary Shares upon the completion of the Initial Public Offering (in shares) | shares |  |  |  |  | 7,295,454 |  |  | 7,295,454 |  | (7,295,454) |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares for exercised share options | 8,989 |  |  |  |  |  |  |  |  |  |  | 8,989 |  |  |  |  | 8,989 |  |  |
Issuance of ordinary shares for exercised share options (in shares) | shares |  |  | 2,655,669 |  | 2,655,669 |  | 2,655,669 |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of shares | (54,600) |  |  |  |  |  |  |  |  |  | ¥ (54,600) |  |  |  |  |  | (54,600) |  |  |
Repurchase of shares (in shares) | shares |  |  |  |  | (4,232,169) |  | (4,232,169) |  |  |  | 4,232,169 |  |  |  |  |  |  |  |  |
Purchase of non-controlling interests | (1,286) |  |  |  |  |  |  |  |  |  |  | 1,016 |  |  |  |  | 1,016 |  |  | (2,302)
Dividend to non-controlling interests | (1,236) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,236)
Appropriation to statutory reserves |  |  |  |  |  |  |  |  |  |  |  | 3,464 |  | (3,464) |  |  |  |  |  |
Foreign currency translation adjustment | (40,239) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (40,239) | (40,239) |  |  |
Balances at Dec. 31, 2020 | 1,530,319 |  |  |  |  |  | ¥ 6 |  | ¥ 6 |  | ¥ (54,600) | 1,278,004 |  | 363,051 |  | (59,384) | 1,527,083 |  |  | 3,236
Balances (in shares) at Dec. 31, 2021 | shares |  |  |  |  | 105,516,779 | 103,214,547 | 105,516,779 |  | 103,214,547 |  | 6,230,139 |  |  |  |  |  |  |  |  |
Net income (loss) attributable to the Company and a non-controlling interest shareholder | 88,891 | $ 13,949 |  |  |  |  |  |  |  |  |  |  |  | 88,605 |  |  | 88,605 |  |  | 286
Share-based compensation related to Share Incentive Plan |  |  | ¥ 47,405 |  |  |  |  |  |  |  |  |  | ¥ 47,405 |  |  |  |  | ¥ 47,405 |  |
Securities have been converted into Ordinary Shares upon the completion of the Initial Public Offering (in shares) | shares |  |  |  |  | 339,999 |  |  | 339,999 |  | (339,999) |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares for exercised share options | 9,941 |  |  |  |  |  |  |  |  |  |  | 9,941 |  |  |  |  | 9,941 |  |  |
Issuance of ordinary shares for exercised share options (in shares) | shares |  |  | 3,011,064 |  | 3,011,064 |  | 3,011,064 |  |  |  |  |  |  |  |  |  |  |  |  |
Capital injection in a subsidiary from a non-controlling interest shareholder | 175 |  |  |  |  |  |  |  |  |  |  | 175 |  |  |  |  | 175 |  |  |
Repurchase of shares | (12,068) |  |  |  |  |  |  |  |  |  | ¥ (12,068) |  |  |  |  |  | (12,068) |  |  |
Repurchase of shares (in shares) | shares |  |  |  |  | (1,997,970) |  | (1,997,970) |  |  |  | 1,997,970 |  |  |  |  |  |  |  |  |
Appropriation to statutory reserves |  |  |  |  |  |  |  |  |  |  |  | 1,756 |  | (1,756) |  |  |  |  |  |
Foreign currency translation adjustment | (13,736) | (2,155) |  |  |  |  |  |  |  |  |  |  |  |  |  | (13,736) | (13,736) |  |  |
Balances at Dec. 31, 2021 | ¥ 1,650,927 | $ 259,067 |  |  |  |  | ¥ 6 |  | ¥ 6 |  | ¥ (66,668) | ¥ 1,337,281 |  | ¥ 449,900 |  | ¥ (73,120) | ¥ 1,647,405 |  |  | ¥ 3,522

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