v3.25.2
Long-term investments (Details Narrative)
Jun. 30, 2025
USD ($)
Jun. 30, 2025
CNY (¥)
Dec. 31, 2024
CNY (¥)
Schedule of Investments [Line Items]      
Cost method investments $ 13,559 ¥ 97,062 ¥ 97,062
Investment 1 [Member]      
Schedule of Investments [Line Items]      
Impairment allowance 74,600 534,031  
Investment 2 [Member]      
Schedule of Investments [Line Items]      
Impairment allowance $ 79,472 ¥ 568,907