v3.26.1
Concentration of Risks (Tables)
 12 Months Ended
Dec. 31, 2025
Customer Concentration Risk [Member]  
Concentration Risk [Line Items]  
Summary of External Customers with 10% or More of Group's Revenues
External customers with 10% or more of the Group’s revenues for the years presented are as follows:
 
    
For the year ended December 31,
  
    
2023
     
2024
     
2025
  
    
RMB
     
RMB
     
RMB
     
US$
  
Customer
            
A
      —         —         100,000        14,300  
B
      28,673        *        81,504        11,655  
C
      —         120,796        53,540        7,656  
D

      —         100,000        —         —   
E

      —         63,451        —         —   
F

      11,752        —         *        *  
 
 
*
less than 10% of total revenues of the Group.
Supplier Concentration Risk [Member]  
Concentration Risk [Line Items]  
Summary of External Customers with 10% or More of Group's Revenues
Suppliers accounting for 10% or more of total purchases of materials for the years presented are as follows:
 
    
For the year ended December 31,
  
    
2023
     
2024
     
2025
  
    
RMB
     
RMB
     
RMB
     
US$
  
Supplier
            
A
      —         —         26,399        3,775  
B
      *        22,576        *        *  
C
      5,585        *        *        *  

 
*
less than 10% of total purchase of materials of the Group.