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Accounts receivable, net (Details)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2023 CNY (¥)
Credit Loss [Abstract]
Accounts receivable	$ 3,298,998	¥ 23,714,517	¥ 26,963,149
Less: allowance of credit losses			(3,951,391)
Accounts receivable, net	$ 3,298,998	¥ 23,714,517	¥ 23,011,758

X

- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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