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PUT OPTION LIABILITIES - Additional information (Details) - CNY (¥)
¥ in Millions
Apr. 30, 2026
Sep. 30, 2021
Jul. 31, 2019
PUT OPTION LIABILITIES      
Percentage of investment return fall if cannot complete initial public offering     10.00%
Wenyuan Yuexing      
PUT OPTION LIABILITIES      
Amount of introduce capital on new company     ¥ 36.0
Percentage of voting equity interests acquired     20.00%
Percentage of equity interest redeem for one of investor in advance 5.00% 15.00%  
Guangzhou Jingqi      
PUT OPTION LIABILITIES      
Amount of introduce capital on new company     ¥ 28.8
Percentage of voting equity interests acquired     16.00%