| Schedule of property and equipment, net |
| | | | | | | | | | | | June 30, | | June 30, | | June 30, | | | 2025 | | 2026 | | 2026 | | | RMB | | RMB | | US Dollars | Motor vehicles | | ¥ | 3,665,426 | | ¥ | 3,779,077 | | $ | 556,967 | Office equipment and fixtures | | | 1,368,950 | | | 1,469,444 | | | 216,569 | Production equipment | | | 30,938,857 | | | 30,637,087 | | | 4,515,348 | Leasehold improvement | | | 2,260,000 | | | 2,260,000 | | | 333,083 | Total cost | | | 38,233,233 | | | 38,145,608 | | | 5,621,967 | Less: accumulated depreciation | | | (18,072,448) | | | (20,814,564) | | | (3,067,687) | Less: accumulated impairment | | | (174,150) | | | (172,300) | | | (25,394) | Property and equipment, net | | ¥ | 19,986,635 | | ¥ | 17,158,744 | | $ | 2,528,886 |
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