v3.26.1
SHARE-BASED COMPENSATION - 2021 Plan (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Aug. 29, 2025
Aug. 14, 2025
May 26, 2025
Apr. 22, 2025
Mar. 10, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award                
Share-based compensation expenses           ¥ 114,652 ¥ 116,064 ¥ 234,624
2021 Option Incentive Plan | Employee share options                
Share-Based Compensation Arrangement by Share-Based Payment Award                
Number of stock options approved under modification 1,572,958 1,572,958 1,572,958 1,572,958 1,572,958