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CONSOLIDATED STATEMENTS OF CHANGES IN (DEFICIT) EQUITY ¥ in Thousands, $ in Thousands | Total shareholders' deficit USD ($) | Total shareholders' deficit CNY (¥) | Accumulated deficit USD ($) | Accumulated deficit CNY (¥) | Accumulated other comprehensive (loss) income USD ($) | Accumulated other comprehensive (loss) income CNY (¥) | Additional paid-in capital USD ($) | Additional paid-in capital CNY (¥) | Series A-1 Convertible Preferred Shares CNY (¥) shares | Ordinary shares shares | Class A ordinary shares CNY (¥) shares | Class B Ordinary shares shares | USD ($) | CNY (¥)
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at the beginning of the period at Dec. 31, 2016 |  | ¥ (1,486,491) |  | ¥ (1,281,336) |  | ¥ (265,720) |  | ¥ 55,052 | ¥ 5,513 |  |  |  |  |
Balance at the beginning of the period (in shares) at Dec. 31, 2016 | shares |  |  |  |  |  |  |  |  | 102,102,318 | 945,712,030 |  |  |  |
CHANGES IN DEFICIT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | 649 |  | 649 |  |  |  |  |  |  |  |  |  | ¥ 649
Redeemable Convertible Preferred Shares redemption value accretion |  | (228,468) |  | (228,468) |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments, net of nil tax |  | 110,667 |  |  |  | 110,667 |  |  |  |  |  |  |  | 110,667
Balance at the end of the period at Dec. 31, 2017 |  | (1,603,643) |  | (1,509,155) |  | (155,053) |  | 55,052 | ¥ 5,513 |  |  |  |  |
Balance at the end of the period (in shares) at Dec. 31, 2017 | shares |  |  |  |  |  |  |  |  | 102,102,318 | 945,712,030 |  |  |  |
CHANGES IN DEFICIT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | 104,026 |  | 104,026 |  |  |  |  |  |  |  |  |  | 104,026
Redeemable Convertible Preferred Shares redemption value accretion |  | (248,186) |  | (248,186) |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments, net of nil tax |  | (119,487) |  |  |  | (119,487) |  |  |  |  |  |  |  | (119,487)
Balance at the end of the period at Dec. 31, 2018 |  | (1,867,290) |  | (1,653,315) |  | (274,540) |  | 55,052 | ¥ 5,513 |  |  |  |  | (1,867,290)
Balance at the end of the period (in shares) at Dec. 31, 2018 | shares |  |  |  |  |  |  |  |  | 102,102,318 | 945,712,030 |  |  |  |
CHANGES IN DEFICIT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | (510,387) |  | (510,387) |  |  |  |  |  |  | ¥ (510,387) |  | $ (73,311) | (510,387)
Redeemable Convertible Preferred Shares redemption value accretion |  | (116,308) |  | (116,308) |  |  |  |  |  |  |  |  |  |
Deemed dividend to preferred shareholder |  |  |  | (642,174) |  |  |  | 642,174 |  |  | ¥ (642,174) |  | (92,243) | (642,174)
Foreign currency translation adjustments, net of nil tax |  | (94,357) |  |  |  | (94,357) |  |  |  |  |  |  | (13,554) | (94,357)
Re-designating ordinary shares to Class B ordinary shares | shares |  |  |  |  |  |  |  |  |  | (619,938,058) |  | 619,938,058 |  |
Re-designating ordinary shares to Class A ordinary shares | shares |  |  |  |  |  |  |  |  |  | (325,773,972) | 325,773,972 |  |  |
Conversion of Series A-1 Preferred Shares to Class A ordinary shares |  |  |  |  |  |  |  | 5,513 | ¥ (5,513) |  |  |  |  |
Conversion of Series A-1 Preferred Shares to Class A ordinary shares (in shares) | shares |  |  |  |  |  |  |  |  | (102,102,318) |  | 102,102,318 |  |  |
Conversion of Series A-2, B and C Redeemable Convertible Preferred Shares to Class A ordinary shares |  | 2,933,088 |  |  |  |  |  | 2,933,087 |  |  | ¥ 1 |  |  | (2,933,086)
Conversion of Series A-2, B and C Redeemable Convertible Preferred Shares to Class A ordinary shares (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 612,941,413 |  |  |
Issuance of Class A ordinary shares upon initial public offering ("IPO"), net of offering cost |  | 498,436 |  |  |  |  |  | 498,436 |  |  |  |  |  |
Issuance of Class A ordinary shares upon initial public offering ("IPO"), net of offering cost (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 162,504,475 |  |  |
Share-based compensation |  | 745,873 |  |  |  |  |  | 745,873 |  |  |  |  |  |
Balance at the end of the period at Dec. 31, 2019 | $ 228,252 | ¥ 1,589,055 | $ (419,747) | ¥ (2,922,184) | $ (52,989) | ¥ (368,897) | $ 700,988 | ¥ 4,880,135 |  |  | ¥ 1 |  | $ 228,252 | ¥ 1,589,055
Balance at the end of the period (in shares) at Dec. 31, 2019 | shares |  |  |  |  |  |  |  |  |  |  | 1,203,322,178 | 619,938,058 |  |

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