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REVENUES, OTHER GAIN (LOSS), NET AND OTHER INCOME, NET - Summary of other gain (loss), net (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
REVENUES, OTHER GAIN (LOSS), NET AND OTHER INCOME, NET |  |  |  |
Gross unrealized gain on equity investments held | ¥ 1,689 | $ 237 | ¥ 22,452 | ¥ 82,492
Gross unrealized loss (including impairment) on equity investments held | (26,051) | (3,668) | (37,623) |
Net realized gain (loss) on equity investments sold | 100 | 14 | (123) | 10,363
Gain on disposal of a subsidiary | 6,022 | 848 |  |
Changes in fair value of purchase consideration in a business acquisition | (14,433) | (2,033) | (28,516) | (9,249)
Total | ¥ (32,673) | $ (4,602) | ¥ (43,810) | ¥ 83,606

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