XML 69 R49.htm IDEA: XBRL DOCUMENT v3.25.1
Summary of significant accounting policies (Details 2)
12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Product Information [Line Items]        
Total revenues $ 75,327,948 ¥ 541,487,420 ¥ 580,016,414 ¥ 586,060,092
Central Processing Advertising Algorithm Services [Member]        
Product Information [Line Items]        
Total revenues 75,327,948 541,487,420 569,906,586 446,607,076
Mobile Games [Member]        
Product Information [Line Items]        
Total revenues 1,205,235
Sales Of Intelligent Chips [Member]        
Product Information [Line Items]        
Total revenues ¥ 10,109,828 ¥ 138,247,781