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Equity method investments (Details) - CNY (¥) ¥ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2016 | Jul. 31, 2016 | May 31, 2006 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Apr. 30, 2018
Equity Method Investments and Joint Ventures [Abstract] |  |  |  |  |  |  |
Invested amount | ¥ 10,000 | ¥ 9,000 | ¥ 250 |  |  |  |
Equity interests percentage | 20.00% | 15.00% | 30.00% |  |  |  |
Additional investment |  |  |  |  |  |  | ¥ 3,750
Recognized (loss)/gain on equity method investments |  |  |  | ¥ (1,532) | ¥ 2,658 | ¥ 1,668 |

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- Definition the amount of equity in (loss) / income on equity method investments. + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition The cash outflow from the amount invested for projects in hopes of getting a future return or interest from it. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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