v3.26.1
Related party transactions (Details)
Sep. 30, 2025
USD ($)
Sep. 30, 2025
CNY (¥)
Mar. 31, 2025
USD ($)
Mar. 31, 2025
CNY (¥)
Mar. 31, 2024
CNY (¥)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Amounts due from related parties $ 63,071 ¥ 449,000 $ 188,088 ¥ 1,339,000 ¥ 126,400
Lirong Liu [Member]          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Amounts due from related parties $ 63,071 ¥ 449,000 $ 188,088 ¥ 1,339,000 ¥ 126,400