| Accounts receivable |
3. Accounts receivable | | | As of | | | | | June 30, 2025 | | | December 31, 2025 | | | | | RMB | | | RMB | | | | | | | | (Unaudited) | | | Accounts receivables | | | 52,904,617 | | | | 80,795,369 | | | Less: allowance of doubtful accounts | | | 9,125,428 | | | | (13,412,514 | ) | | Total accounts receivable, net | | | 43,779,189 | | | | 67,382,855 | |
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| 4. | Accounts receivable, net | | | | As of June 30, | | | | | 2024 | | | 2025 | | | | | RMB | | | RMB | | | Accounts receivable | | | 41,469,595 | | | | 52,904,617 | | | Less: allowance of credit losses | | | - | | | | 9,125,428 | | | Accounts receivable, net | | | 41,469,595 | | | | 43,779,189 | | The movements in the allowance of credit losses were as follows: | | | For the years ended June 30, | | | | | 2023 | | | 2024 | | | 2025 | | | | | RMB | | | RMB | | | RMB | | | Beginning balance | | | - | | | | - | | | | - | | | Additions | | | - | | | | - | | | | 9,125,428 | | | Ending balance | | | - | | | | - | | | | 9,125,428 | |
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