v3.26.3
SUMMARY OF STOCK OPTION ACTIVITY (Details) - CNY (¥)
¥ / shares in Units, ¥ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]        
Number of options, Outstanding 25,036,905 24,440,836 24,440,836  
Weighted average exercise price, Outstanding ¥ 0.46 ¥ 0.51 ¥ 0.51  
Weighted-average remaining contractual life (years), Outstanding 11 years 10 days 10 years 9 months 18 days 11 years 8 months 23 days 11 years 5 months 4 days
Aggregate intrinsic value, Outstanding ¥ 21,353 ¥ 19,794 ¥ 19,794  
Number of options, Granted 1,210,000 780,000    
Weighted average exercise price, Granted ¥ 0.11 ¥ 1.68    
Number of options, Forfeited (3,328,587) (1,671,573)    
Weighted average exercise price, Forfeited ¥ 0.32 ¥ 0.20    
Number of options, Exercised (82,998) (45,426)    
Weighted average exercise price, Exercised ¥ 0.11 ¥ 0.50    
Number of options, Outstanding 22,835,320 23,503,837 25,036,905 24,440,836
Weighted average exercise price, Outstanding ¥ 0.46 ¥ 0.52 ¥ 0.46 ¥ 0.51
Aggregate intrinsic value, Outstanding ¥ 18,770 ¥ 19,475 ¥ 21,353 ¥ 19,794
Number of options, Exercisable 11,179,334      
Weighted average exercise price, Exercisable ¥ 0.81      
Weighted-average remaining contractual life (years), Exercisable 3 years 2 months 23 days      
Aggregate intrinsic value, Exercisable ¥ 12,720      
Number of options, Expected to vest 13,486,116      
Weighted average exercise price, Expected to vest ¥ 0.17      
Weighted-average remaining contractual life (years), Expected to vest 17 years 11 months 19 days      
Aggregate intrinsic value, Expected to vest ¥ 8,036