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v3.25.3

BANK LOANS - Short-term bank loans - Narrative (Details) |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
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Jun. 18, 2025 CNY (¥) | Jun. 18, 2025 USD ($) | Jun. 06, 2025 CNY (¥) | Jun. 06, 2025 USD ($) | Jun. 25, 2024 CNY (¥) | Jun. 25, 2024 USD ($) | Jun. 18, 2024 CNY (¥) | Jun. 11, 2024 CNY (¥) | Aug. 31, 2022 CNY (¥) | Aug. 31, 2022 USD ($) | Jun. 30, 2025 CNY (¥) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 CNY (¥) | Jun. 30, 2023 CNY (¥) | Jun. 06, 2025 USD ($) | Jun. 03, 2025 | Jun. 25, 2024 USD ($) | Jun. 18, 2024 USD ($) | Jun. 11, 2024 USD ($) | Aug. 31, 2022 USD ($)
BANK LOANS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from debt |  |  |  |  |  |  |  |  |  |  | ¥ 10,476,000 | $ 1,462,393 | ¥ 11,581,000 | ¥ 13,491,481 |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  |  |  |  | 11,319,623 | 1,580,158 | 11,632,755 | 11,040,000 |  |  |  |  |  |
Interest expense on bank loan |  |  |  |  |  |  |  |  |  |  | ¥ 343,159 | $ 47,903 | ¥ 332,881 | ¥ 416,481 |  |  |  |  |  |
Bank of Kunlun |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BANK LOANS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  |  | ¥ 2,900,000 |  |  |  |  |  |  |  |  |  |  | $ 397,298
Term of debt |  |  |  |  |  |  |  |  | 18 months | 18 months |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  | 6.00%
Repayments of debt |  |  |  |  |  |  |  |  | ¥ 1,000,000 | $ 136,999 |  |  |  |  |  |  |  |  |  |
Collateral value of debt |  |  |  |  |  |  |  |  | ¥ 6,500,000 |  |  |  |  |  |  |  |  |  |  | $ 1,000,000
Industry and Commercial Bank of China ("ICBC") | Revolving loan facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BANK LOANS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of debt |  |  |  |  | 1 year | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  | 2.80% |  |  |  |  |  |  |  |  |  |  |  | 2.80% |  |  |
Proceeds from debt |  |  | ¥ 10,000,000 | $ 1,395,946 | ¥ 10,000,000 | $ 1,395,946 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  | 10,000,000 | $ 1,395,946 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral value of debt |  |  | ¥ 17,000,000 |  |  |  |  |  |  |  |  |  |  |  | $ 2,300,000 |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | ¥ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  | $ 1,395,946 |  |  |
China Construction Bank | Revolving loan facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BANK LOANS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  | ¥ 1,105,000 |  |  |  |  |  |  |  |  |  |  | $ 154,252 |
Term of debt |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.95% |  |  |  |
Industry and Commercial Bank of China ("ICBC") | Revolving loan facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BANK LOANS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of debt | 360 days | 360 days | 1 year | 1 year |  |  | 12 months |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.20% | 3.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from debt | ¥ 476,000 | $ 66,447 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | ¥ 476,000 |  |  |  |  |  |  |  |  |  |  | $ 66,447 |  |

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