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Credit risk (Details Narrative)
Dec. 31, 2025
CNY (¥)
Statement [Line Items]  
Unsecured trade receivable ¥ 16,700,000
Accounts receivables ¥ 5,689,538
Customer 1 [Member] | Trade Accounts Receivable [Member]  
Statement [Line Items]  
Accounts receivables in percentage 15.00%
Customer 3 [Member] | Accounts Receivables [Member]  
Statement [Line Items]  
Accounts receivables in percentage 12.00%
Customer 2 [Member] | Accounts Receivables [Member]  
Statement [Line Items]  
Accounts receivables in percentage 12.00%