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Prepayments and Other Assets, Net (Details) ¥ in Thousands, $ in Thousands | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2024 CNY (¥) | Mar. 31, 2024 CNY (¥) | Sep. 30, 2023 USD ($) | Apr. 10, 2023
Prepayments and Other Assets, Net [Line Items] |  |  |  |  |
Prepayment of rent related to leases expiring | 12 months |  | 12 months |  |
Third-parties rate per annum | 5.00% | 5.00% |  |  |
Prepaid expense | $ 5,362,816 |  |  | $ 3,602,000 |
All Parties [Member] |  |  |  |  |
Prepayments and Other Assets, Net [Line Items] |  |  |  |  |
Consideration amount | 5,983,131 | ¥ 43,200 |  |  |
Prepaid expense | 5,362,816 |  | ¥ 38,721,142 |  |
Business Combination [Member] |  |  |  |  |
Prepayments and Other Assets, Net [Line Items] |  |  |  |  |
Consideration amount | $ 5,000,000 |  |  |  |
Kaiye (Wenzhou) Water Project Development Co., Ltd [Member] |  |  |  |  |
Prepayments and Other Assets, Net [Line Items] |  |  |  |  |
Equity interest |  |  |  |  | 100.00%
Ms. Zhao Dongfang [Member] |  |  |  |  |
Prepayments and Other Assets, Net [Line Items] |  |  |  |  |
Equity interest |  |  |  |  | 3.40%

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