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Equity Method Investments - Summary combined unaudited financial information (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Balance sheet data: |  |  |
Current assets | ¥ 1,423,869 | ¥ 1,615,143 |
Non-current assets | 514,215 | 327,355 |
Total assets | 1,938,084 | 1,942,498 |
Current liabilities | 711,188 | 366,398 |
Total liabilities | 711,188 | 366,398 |
Equity | 1,226,896 | 1,576,100 |
Total liabilities and shareholders' equity | 1,938,084 | 1,942,498 |
Operating data: |  |  |
Revenue | 124,610 | 224,377 | ¥ 66,996
Operating income | 76,502 | 139,025 | 48,507
Net income | ¥ 77,384 | ¥ 139,025 | ¥ 48,253

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