Accounts receivable, net (Details) |
Jun. 30, 2026
CNY (¥)
|
Jun. 30, 2026
USD ($)
|
Dec. 31, 2025
CNY (¥)
|
|---|---|---|---|
| Accounts receivable, net | |||
| Accounts receivable - third parties | ¥ 8,337,549 | $ 1,228,803 | ¥ 7,146,902 |
| Less: allowance for credit losses | (2,318,007) | (341,632) | (887,898) |
| Accounts receivable, net | ¥ 6,019,542 | $ 887,171 | ¥ 6,259,004 |
| 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, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|