v3.26.1
Summary of significant accounting policies (Tables)
6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]  
Schedule of estimated useful lives of property and equipment, net
   
    Useful Life
Office equipment   3 years
Office furniture and fixtures   35 years
Vehicles   35 years
Leasehold improvements   lesser of lease term or expected useful life
Schedule of disaggregation of revenue
                       
    June 30,
2025
    June 30,
2026
    June 30,
2026
 
    RMB     RMB     USD  
    (Unaudited)     (Unaudited)     (Unaudited)  
Central processing advertising algorithm services     188,112,127       136,706,698       20,071,752  
Total revenues     188,112,127       136,706,698       20,071,752  
Schedule of revenue by timing of transfer of goods or services
                       
    June 30,
2025
    June 30,
2026
    June 30,
2026
 
    RMB     RMB     USD  
    (Unaudited)     (Unaudited)     (Unaudited)  
Services transferred at a point in time     142,800,304       74,260,052       10,903,118  
Services transferred over time     45,311,823       62,446,646       9,168,634  
Total revenues     188,112,127       136,706,698       20,071,752  
Schedule of revenue by geographic locations
                       
    June 30,
2025
    June 30,
2026
    June 30,
2026
 
    RMB     RMB     USD  
    (Unaudited)     (Unaudited)     (Unaudited)  
Mainland PRC revenues     142,800,304       74,260,052       10,903,118  
Hong Kong revenues     45,311,823       62,446,646       9,168,634  
Total revenues     188,112,127       136,706,698       20,071,752  
Schedule of noncontrolling interests
                       
    December 31,
2025
    June 30,
2026
    June 30,
2026
 
    RMB     RMB     USD  
          (Unaudited)     (Unaudited)  
Shanghai Weimu     2,512,517       2,989,323       438,903  
Viwo Cayman     28,729,950       33,925,085       4,980,999  
Total noncontrolling interests     31,242,467       36,914,408       5,419,902