v3.25.4
Borrowings (Details) - CNY (¥)
¥ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Borrowings    
Borrowings, interest rate 3.00%  
Banking facility (in Yuan Renminbi) ¥ 125.0 ¥ 380.3
Bottom of range [member]    
Borrowings    
Borrowings, interest rate   4.20%
Top of range [member]    
Borrowings    
Borrowings, interest rate   5.50%
Within 1 year [Member] | Bottom of range [member]    
Borrowings    
Borrowings, interest rate 4.20% 3.50%
Within 1 year [Member] | Top of range [member]    
Borrowings    
Borrowings, interest rate 6.20% 15.00%
Borrowings Due on June 2025 [Member] | LPR+Eighty BP [Member]    
Borrowings    
Borrowings maturity June 2025  
Borrowings Due on January 2025 [Member] | LPR+Eighty BP [Member]    
Borrowings    
Borrowings partially repayable date Jan. 31, 2025  
Borrowings Due on February 2025 [Member] | LPR+Eighty BP [Member]    
Borrowings    
Borrowings partially repayable date Feb. 28, 2025  
Borrowings Due on December 2025 [Member] | LPR+Eighty BP [Member]    
Borrowings    
Borrowings partially repayable date Dec. 31, 2025  
Borrowings Due on October 2027 [Member] | LPR+Eighty BP [Member]    
Borrowings    
Borrowings partially repayable date Oct. 31, 2027