Other payables and accrued liabilities (Details Narrative)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 CNY (¥)	Dec. 31, 2024 CNY (¥)
Payables and Accruals [Abstract]
Other payables and accrued liabilities	$ 4,475,696	¥ 31,458,765	¥ 14,129,987

Amount of liabilities incurred and payable to vendors for goods and services received classified as other, and expenses incurred but not yet paid, payable within one year or the operating cycle, if longer.

No definition available.

Name:	us-gaap_OtherAccountsPayableAndAccruedLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant