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ACCOUNTS RECEIVABLE, NET - Additional Information (Details) - Related party ¥ in Thousands, $ in Thousands | Dec. 31, 2025 CNY (¥) | Dec. 31, 2025 USD ($) | Sep. 30, 2025
--- | --- | --- | ---
ACCOUNTS RECEIVABLE, NET |  |  |
Accounts receivable | ¥ 6,284 | $ 899 |
Accounts receivable, net of allowance for credit losses | 0 |  |
Shanghai joint venture |  |  |
ACCOUNTS RECEIVABLE, NET |  |  |
Equity interest acquired |  |  | 49.00%
Accounts receivable | 6,300 | $ 900 |
Accounts receivable, net of allowance for credit losses | ¥ 0 |  |

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