ACQUISITIONS AND DISPOSALS - Acquisition of Healthingkon Assets and Liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 CNY (¥)
ACQUISITIONS AND DISPOSALS
Goodwill	¥ 572,216	$ 81,826	¥ 572,216	$ 81,826	¥ 575,427

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details