Discontinued operation (Details 1) - CNY (¥)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement [Line Items]
Net cash used in operating activities	¥ (9,098,000)	¥ (11,017,000)	¥ (7,435,000)
Net cash generated from financing activities	8,272,000	14,785,000	6,628,000
Net increase/(decrease) in cash generated by discontinued operations	(826,000)	3,768,000	¥ (807,000)
Discontinued operations [member]
Statement [Line Items]
Net cash used in investing activities	0	0
Net cash used in operating activities	0	0
Net cash generated from financing activities	0	0
Net increase/(decrease) in cash generated by discontinued operations	¥ 0	¥ 0

No definition available.

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- Definition

The cash inflow (outflow) due to a decrease (increase) in restricted cash and cash equivalents. [Refer: Restricted cash and cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The cash flows from (used in) financing activities, which are activities that result in changes in the size and composition of the contributed equity and borrowings of the entity, from continuing and discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The cash flows from (used in) investing activities, which are the acquisition and disposal of long-term assets and other investments not included in cash equivalents, from continuing and discontinued operations.

+ References

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The cash flows from (used in) operating activities, which are the principal revenue-producing activities of the entity and other activities that are not investing or financing activities, from continuing and discontinued operations. [Refer: Revenue]

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