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Accounts receivable and allowance for credit losses | 6 Months Ended
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Jun. 30, 2025
Credit Loss [Abstract] |
Accounts receivable and allowance for credit losses | Note 5 — Accounts receivable and allowance for credit losses Accounts receivable, net consisted of the following:
Schedule of allowance for doubtful accounts |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2024 |  |  | June 30, 2025 |  |  | June 30, 2025 |
|  | RMB |  |  | RMB |  |  | USD |
|  |  |  |  | (Unaudited) |  |  | (Unaudited) |
Accounts receivable |  |  | 23,714,517 |  |  |  | 23,518,435 |  |  |  | 3,285,340 |
Less: allowance for credit losses |  |  | - |  |  |  | - |  |  |  | - |
Accounts receivable, net |  |  | 23,714,517 |  |  |  | 23,518,435 |  |  |  | 3,285,340 |
The following table summarizes the changes in allowance for credit losses:
Schedule of allowance for doubtful accounts |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2024 |  |  | June 30, 2025 |  |  | June 30, 2025 |
|  | RMB |  |  | RMB |  |  | USD |
|  |  |  |  | (Unaudited) |  |  | (Unaudited) |
Beginning balance |  |  | 3,951,391 |  |  |  | - |  |  |  | - |
Addition |  |  | - |  |  |  | - |  |  |  | - |
Recovery |  |  | (3,951,391 | ) |  |  | - |  |  |  | - |
|  |  | - |  |  |  | - |  |  |  | - |
Ending balance |  |  | - |  |  |  | - |  |  |  | - |
Allowance for credit losses net for the year ended December 31, 2024 and the six months ended June 30, 2025 amounted to nil and nil, respectively. 0

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- Definition The entire disclosure for accounts receivable, contract receivable, receivable held-for-sale, and nontrade receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/310/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/326/tableOfContent + Details
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- References No definition available. + Details
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Period Type: | duration