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Acquisition - Purchase price allocation (Details) ¥ in Thousands, $ in Thousands | Jan. 13, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥)
--- | --- | --- | ---
Purchase price allocation |  |  |
Goodwill |  | $ 17,688 | ¥ 115,414
Longye |  |  |
Purchase price allocation |  |  |
Goodwill | ¥ 115,414 |  |
Net liabilities acquired, excluding intangible assets and the related deferred tax liabilities | (18,021) |  |
Deferred tax liabilities | (6,483) |  |
Purchase price allocation | ¥ 116,865 |  |
Customer relationships |  |  |
Purchase price allocation |  |  |
Amortization period | 3 years |  |
Customer relationships | Longye |  |  |
Purchase price allocation |  |  |
Intangible assets | ¥ 3,300 |  |
Trade names |  |  |
Purchase price allocation |  |  |
Amortization period | 10 years |  |
Trade names | Longye |  |  |
Purchase price allocation |  |  |
Intangible assets | ¥ 4,822 |  |
Technologies |  |  |
Purchase price allocation |  |  |
Amortization period | 7 years |  |
Technologies | Longye |  |  |
Purchase price allocation |  |  |
Intangible assets | ¥ 17,833 |  |

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