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v3.21.1

Organization and Reorganization - Comprehensive loss of the group's vie (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥)
Variable Interest Entity [Line Items] |  |  |  |
Net revenue |  | ¥ 330,228 | ¥ 644,773 | ¥ 651,013
Net (loss)/profit from continuing operations | $ (25,056) | (163,478) | (251,299) | (75,088)
Net (loss)/profit from discontinued operations | $ 0 | 0 | 0 | (3,612)
Net (loss)/profit |  | (163,500) | (251,300) | (78,700)
Major VIEs |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Net revenue |  | 104,819 | 144,115 | 329,788
Net (loss)/profit from continuing operations |  | (3,462) | 7,450 | (34,674)
Net (loss)/profit from discontinued operations |  | 0 |  | (3,612)
Net (loss)/profit |  | ¥ (3,462) | ¥ 7,450 | ¥ (38,286)

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