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Summary of significant accounting policies (Tables)
 12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]  
Schedule of estimated useful lives of property and equipment, net
     
    Useful Life  
Office equipment   3 years  
Office furniture and fixtures   3 – 5 years  
Vehicles   3 – 5 years  
Leasehold improvements   lesser of lease term or expected useful life  
Schedule of estimated useful lives of intangible assets, net
     
    Useful Life  
Non-compete agreements   6 years  
Schedule of disaggregation of revenue
                               
    December 31,
2022		     December 31,
2023		     December 31,
2024		     December 31,
2024		  
    RMB     RMB     RMB     USD  
Central processing advertising algorithm services     446,607,076       569,906,586       541,487,420       75,327,948  
Mobile games     1,205,235       -       -       -  
Sales of intelligent chips     138,247,781       10,109,828       -       -  
Total revenues     586,060,092       580,016,414       541,487,420       75,327,948  
Schedule of revenue by timing of transfer of goods or services
                               
    December 31,
2022		     December 31,
2023		     December 31,
2024		     December 31,
2024		  
    RMB     RMB     RMB     USD  
Goods and services transferred at a point in time     586,060,092       580,016,414       414,763,523       57,699,003  
Services transferred over time     -       -       126,723,897       17,628,945  
Total revenues     586,060,092       580,016,414       541,487,420       75,327,948  
Schedule of revenue by geographic locations
                               
    December 31,
2022		     December 31,
2023		     December 31,
2024		     December 31,
2024		  
    RMB     RMB     RMB     USD  
Mainland PRC revenues     448,978,186       540,294,309       414,763,523       57,699,003  
Hong Kong revenues     -       29,612,277       126,723,897       17,628,945  
International revenues     137,081,906       10,109,828       -       -  
Total revenues     586,060,092       580,016,414       541,487,420       75,327,948  
Schedule of noncontrolling interests
                       
    December 31,
2023		     December 31,
2024		     December 31,
2024		  
    RMB     RMB     USD  
Shanghai Weimu     3,065,579       4,495,040       625,318  
Viwo Tech     741,356       13,092,921       1,821,396  
Vize Technology Limited     (9,073 )     -       -  
Total noncontrolling interests     3,797,862       17,587,961       2,446,714