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LONG-TERM INVESTMENTS, NET - Long-term held to maturity investments (Details) - Dec. 31, 2025 - Long-term investments ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
LONG-TERM INVESTMENTS, NET
Cost or Amortized cost	¥ 1,079,771
Gross unrecognized holding gains	388
Gross unrecognized holding losses	(275)
Fair value	¥ 1,079,884	$ 154,421

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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