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v3.25.1

Related party transactions and balances (Tables) | 12 Months Ended
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Dec. 31, 2024
Related Party Transactions [Abstract] |
Schedule of related parties |
Schedule of related parties |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2023 |  |  | December 31, 2024 |  |  | December 31, 2024 |
|  | RMB |  |  | RMB |  |  | USD |
Amount due to Parent |  |  | 17,379,013 |  |  |  | - |  |  |  | - |
Amount due to a related party-Joyous JD |  |  | 1,086,012 |  |  |  | - |  |  |  | - |

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- References No definition available. + Details
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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration