v3.25.2
Summary of significant accounting policies (Tables)
6 Months Ended
Jun. 30, 2025
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  
Schedule of disaggregation of revenue
                       
    June 30,
2024
    June 30,
2025
    June 30,
2025
 
    RMB     RMB     USD  
    (Unaudited)     (Unaudited)     (Unaudited)  
Central processing advertising algorithm services     290,441,871       188,112,127       26,277,782  
Total revenues     290,441,871       188,112,127       26,277,782  
Schedule of revenue by timing of transfer of goods or services
                 
    June 30,
2024
    June 30,
2025
    June 30,
2025
 
    RMB     RMB     USD  
    (Unaudited)     (Unaudited)     (Unaudited)  
Services transferred at a point in time     239,512,194       142,800,304       19,948,077  
Services transferred over time     50,929,677       45,311,823       6,329,705  
Total revenues     290,441,871       188,112,127       26,277,782  
Schedule of revenue by geographic locations
                       
    June 30,
2024
    June 30,
2025
    June 30,
2025
 
    RMB     RMB     USD  
    (Unaudited)     (Unaudited)     (Unaudited)  
Mainland PRC revenues     239,512,194       142,800,304       19,948,077  
Hong Kong revenues     50,929,677       45,311,823       6,329,705  
Total revenues     290,441,871       188,112,127       26,277,782  
Schedule of noncontrolling interests
                       
    December 31,
2024
    June 30,
2025
    June 30,
2025
 
    RMB     RMB     USD  
          (Unaudited)     (Unaudited)  
Shanghai Weimu     4,495,040       4,661,702       651,203  
Viwo Tech     13,092,921       18,191,786       2,541,249  
Total noncontrolling interests     17,587,961       22,853,488       3,192,452