Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Subsequent events (Details)			12 Months Ended
Subsequent events (Details)	Apr. 06, 2026 CNY (¥) shares	Apr. 06, 2026 USD ($) $ / shares shares	Dec. 31, 2025 $ / shares
American Depositary Shares
Subsequent events
Repurchased shares, average price \| $ / shares			$ 2.2703
Subsequent event
Subsequent events
Amount of shares repurchased	¥ 27,477,627	$ 3,992,448
Subsequent event \| American Depositary Shares
Subsequent events
Number of shares repurchased \| shares	1,480,454	1,480,454
Repurchased shares, average price \| $ / shares		$ 2.6968
Subsequent event \| Class A ordinary shares
Subsequent events
Number of shares repurchased \| shares	1,480,454	1,480,454