v3.26.1
CONVERTIBLE NOTES - Subsidiary Convertible Note (Details) - CNY (¥)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2022
CONVERTIBLE NOTES      
Term of the debt instrument     5 years
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:PrimeRateMember us-gaap:PrimeRateMember us-gaap:PrimeRateMember
Subsidiary Convertible Note      
CONVERTIBLE NOTES      
Term of the debt instrument     7 years
Aggregate principal amount of loan     ¥ 500,000
Variable interest rate     79.80%
Debt instrument conversion price per share     ¥ 135
Number of shares represented for 1 RMB registered capital     1