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Taxes (Details 2)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Deferred tax assets:      
Net operating loss carryforwards
Allowance for credit losses 61,258 440,346 987,848
Less: valuation allowance
Deferred tax assets, net $ 61,258 ¥ 440,346 ¥ 987,848