v3.26.1
INCOME TAXES (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2027
Dec. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax [Line Items]          
Enterprise income tax     6.61% (1.12%) (0.14%)
Retained earnings     ¥ 0 ¥ 0 ¥ 0
United States          
Income Tax [Line Items]          
Applicable income tax rate     27.98% 27.98% 27.98%
Chinese Mainland          
Income Tax [Line Items]          
Enterprise income tax     25.00%    
Preferential tax rate 15.00% 15.00% 15.00% 15.00% 15.00%
HNTE status review period     3 years    
Percentage of tax deductible expenses engaged in R&D activities         200.00%
Percentage of withholding tax on foreign investors, non-resident enterprises     10.00%