| Summary of prepayment and other current assets |
| | | | | | | | | As of | | As of | | As of | | | December 31, | | June 30, | | June 30, | | | 2025 | | 2026 | | 2026 | | | RMB | | RMB | | US$ | Prepaid expenses | | 11,937,161 | | 8,071,162 | | 1,189,542 | Prepayment for intangible assets | | 43,352,840 | | 25,070,945 | | 3,695,000 | Employee loans | | 2,729,457 | | 1,874,808 | | 276,313 | Other project investment | | 1,683,616 | | — | | — | Other receivables | | 1,937,493 | | 3,007,897 | | 443,309 | Total | | 61,640,567 | | 38,024,812 | | 5,604,164 |
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