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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY ¥ in Millions | Ordinary Shares Adjusted balance as of January 1, 2020 CNY (¥) shares | Ordinary Shares CNY (¥) shares | Ordinary Shares USD ($) shares | Treasury Shares Adjusted balance as of January 1, 2020 CNY (¥) shares | Treasury Shares CNY (¥) shares | Additional Paid-in Capital Adjusted balance as of January 1, 2020 CNY (¥) | Additional Paid-in Capital CNY (¥) | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment CNY (¥) | Retained Earnings Adjusted balance as of January 1, 2020 CNY (¥) | Retained Earnings CNY (¥) | Accumulated Other Comprehensive (Loss) Income Cumulative Effect, Period of Adoption, Adjustment CNY (¥) | Accumulated Other Comprehensive (Loss) Income Adjusted balance as of January 1, 2020 CNY (¥) | Accumulated Other Comprehensive (Loss) Income CNY (¥) | Noncontrolling Interest Adjusted balance as of January 1, 2020 CNY (¥) | Noncontrolling Interest CNY (¥) | Cumulative Effect, Period of Adoption, Adjustment CNY (¥) | Adjusted balance as of January 1, 2020 CNY (¥) | CNY (¥) shares | USD ($) shares
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 |  | ¥ 0 |  |  | ¥ (107) |  | ¥ 3,624 |  |  | ¥ 2,513 |  |  | ¥ 168 |  | ¥ 36 |  |  | ¥ 6,234 |
Balance issued (in shares) at Dec. 31, 2017 | shares |  | 294,040,234 | 294,040,234 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance outstanding (in shares) at Dec. 31, 2017 | shares |  | 280,518,358 | 280,518,358 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares, balance (in shares) at Dec. 31, 2017 | shares |  |  |  |  | 3,096,764 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares upon exercise of options and vesting of restricted stocks |  | ¥ 0 |  |  |  |  | 14 |  |  |  |  |  |  |  |  |  |  | 14 |
Issuance of ordinary shares upon exercise of options and vesting of restricted stocks (in shares) | shares |  | 2,557,654 | 2,557,654 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  | 83 |  |  |  |  |  |  |  |  |  |  | 83 |
Noncontrolling interest recognized in connection with acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150 |  |  | 150 |
Net income |  |  |  |  |  |  |  |  |  | 716 |  |  |  |  | 11 |  |  | 727 |
Cash dividends declared/paid/approved |  |  |  |  |  |  |  |  |  | (660) |  |  |  |  |  |  |  | (660) |
Dividends paid to noncontrolling interest holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5) |  |  | (5) |
Capital contribution from noncontrolling interest holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29 |  |  | 29 |
Acquisition of noncontrolling interest |  |  |  |  |  |  | (8) |  |  |  |  |  |  |  | (76) |  |  | (84) |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  |  |  |  | (169) |  |  |  |  | (169) |
Balance (ASU 2016-01) at Dec. 31, 2018 |  |  |  |  |  |  |  | ¥ 41 |  |  | ¥ (41) |  |  |  |  |  |  |  |
Balance at Dec. 31, 2018 |  | ¥ 0 |  |  | ¥ (107) |  | 3,713 |  |  | 2,610 |  |  | (42) |  | 145 |  |  | 6,319 |
Balance issued (in shares) at Dec. 31, 2018 | shares |  | 296,597,888 | 296,597,888 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance outstanding (in shares) at Dec. 31, 2018 | shares |  | 283,076,012 | 283,076,012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares, balance (in shares) at Dec. 31, 2018 | shares |  |  |  |  | 3,096,764 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares upon exercise of options and vesting of restricted stocks |  | ¥ 0 |  |  |  |  | 14 |  |  |  |  |  |  |  |  |  |  | 14 |
Issuance of ordinary shares upon exercise of options and vesting of restricted stocks (in shares) | shares |  | 2,826,597 | 2,826,597 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  | 110 |  |  |  |  |  |  |  |  |  |  | 110 |
Net income |  |  |  |  |  |  |  |  |  | 1,769 |  |  |  |  | (8) |  |  | 1,761 |
Cash dividends declared/paid/approved |  |  |  |  |  |  |  |  |  | (678) |  |  |  |  |  |  |  | (678) |
Dividends paid to noncontrolling interest holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5) |  |  | (5) |
Capital contribution from noncontrolling interest holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22 |  |  | 22 |
Disposal of noncontrolling interest for deconsolidation |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  | 3 |
Acquisition of noncontrolling interest |  |  |  |  |  |  | (3) |  |  |  |  |  |  |  | (36) |  |  | (39) |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  |  |  |  | (7) |  |  |  |  | (7) |
Balance (ASU 2016-13) at Dec. 31, 2019 | ¥ 0 |  |  | ¥ (107) |  | ¥ 3,834 |  | ¥ (7) | ¥ 3,694 |  |  | ¥ (49) |  | ¥ 121 |  | ¥ (7) | ¥ 7,493 |  |
Balance at Dec. 31, 2019 |  | ¥ 0 |  |  | ¥ (107) |  | 3,834 |  |  | 3,701 |  |  | (49) |  | 121 |  |  | ¥ 7,500 |
Balance issued (in shares) (ASU 2016-13) at Dec. 31, 2019 | shares | 299,424,485 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance issued (in shares) at Dec. 31, 2019 | shares |  | 299,424,485 | 299,424,485 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 299,424,485 | 299,424,485
Balance outstanding (in shares) (ASU 2016-13) at Dec. 31, 2019 | shares | 285,902,609 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance outstanding (in shares) at Dec. 31, 2019 | shares |  | 285,902,609 | 285,902,609 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 285,902,609 | 285,902,609
Treasury shares, balance (in shares) (ASU 2016-13) at Dec. 31, 2019 | shares |  |  |  | 3,096,764 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares, balance (in shares) at Dec. 31, 2019 | shares |  |  |  |  | 3,096,764 |  |  |  |  |  |  |  |  |  |  |  |  | 3,096,764 | 3,096,764
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares upon exercise of options and vesting of restricted stocks |  | ¥ 0 |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  | ¥ 2 |
Issuance of ordinary shares upon exercise of options and vesting of restricted stocks (in shares) | shares |  | 1,454,307 | 1,454,307 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  | 122 |  |  |  |  |  |  |  |  |  |  | 122 |
Issuance of ordinary shares in Hong Kong public offering |  | ¥ 0 |  |  |  |  | 5,968 |  |  |  |  |  |  |  |  |  |  | 5,968 |
Issuance of ordinary shares in Hong Kong public offering (in shares) | shares |  | 23,485,450 | 23,485,450 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Convertible Senior Notes due 2022 |  | ¥ 0 | $ 202 |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  | 0 |
Conversion of Convertible Senior Notes due 2022 (In shares) | shares |  | 202 | 202 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest recognized from partial disposal |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  | 2 |
Noncontrolling interest recognized in connection with acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  | 3 |
Net income |  |  |  |  |  |  |  |  |  | (2,192) |  |  |  |  | (12) |  |  | (2,204) | $ (338,000,000)
Dividends paid to noncontrolling interest holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4) |  |  | (4) |
Capital contribution from noncontrolling interest holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  | 10 |
Disposal of noncontrolling interest for deconsolidation |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 0 |
Loss arising from defined benefit plan, net of tax |  |  |  |  |  |  |  |  |  |  |  |  | (27) |  |  |  |  | (27) | (4,000,000)
Acquisition of noncontrolling interest |  |  |  |  |  |  | (118) |  |  |  |  |  |  |  | (18) |  |  | (136) |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  |  |  |  | 203 |  |  |  |  | 203 | 31,000,000
Balance at Dec. 31, 2020 |  | ¥ 0 |  |  | ¥ (107) |  | ¥ 9,808 |  |  | ¥ 1,502 |  |  | ¥ 127 |  | ¥ 102 |  |  | ¥ 11,432 | $ 1,752,000,000
Balance issued (in shares) at Dec. 31, 2020 | shares |  | 324,364,444 | 324,364,444 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 324,364,444 | 324,364,444
Balance outstanding (in shares) at Dec. 31, 2020 | shares |  | 310,842,568 | 310,842,568 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 310,842,568 | 310,842,568
Treasury shares, balance (in shares) at Dec. 31, 2020 | shares |  |  |  |  | 3,096,764 |  |  |  |  |  |  |  |  |  |  |  |  | 3,096,764 | 3,096,764

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