Convertible notes payable (Details) |
Dec. 31, 2025
USD ($)
|
Dec. 31, 2025
CNY (¥)
|
Dec. 31, 2024
CNY (¥)
|
|---|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | |||
| Convertible notes payable | ¥ (0) | ¥ 149,090,866 | |
| Investor [Member] | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Convertible notes payable | ¥ 149,090,866 |
| X | ||||||||||
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|