v3.20.1

Common Shares - Additional Information (Details) - Private Placement ¥ in Millions, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Apr. 10, 2020 CNY (¥) | Apr. 10, 2020 USD ($) | Dec. 24, 2019 CNY (¥) shares | Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 USD ($)
Common shares |  |  |  |  |
Issuance of common shares upon private placement (in shares) |  |  | 5,662,634 |  |
Proceeds from issuance of common stock |  |  | ¥ 10.0 | ¥ 61.7 | $ 8.8
Subsequent Events |  |  |  |  |
Common shares |  |  |  |  |
Proceeds from issuance of common stock | ¥ 8.5 | $ 1.2 |  |  |

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