v3.26.1
LONG-TERM LOAN - Long-term bank loans (Details)
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Bank loan with effective interest rate 3.10% with expiration date December 17, 2027    
LONG-TERM LOAN    
Effective Interest Rate 3.10% 3.10%
Long-term Bank borrowings ¥ 18,000,000 $ 2,574,000
Bank loan with effective interest rate 3.10% with expiration date June 11, 2027    
LONG-TERM LOAN    
Effective Interest Rate 2.80% 2.80%
Long-term Bank borrowings ¥ 9,950,000 $ 1,422,850
Bank loan with effective interest rate 2.90% with expiration date March 30, 2028    
LONG-TERM LOAN    
Effective Interest Rate 2.90% 2.90%
Long-term Bank borrowings ¥ 9,500,000 $ 1,358,500
Bank loan with effective interest rate 2.90% with expiration date March 30, 2028    
LONG-TERM LOAN    
Effective Interest Rate 2.90% 2.90%
Long-term Bank borrowings ¥ 9,500,000 $ 1,358,500