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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Cash received from principal payments made on loans related to operating activities.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate.

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Short-Term Bank Loans (Details) ¥ in Thousands																				12 Months Ended
Short-Term Bank Loans (Details) ¥ in Thousands	Aug. 25, 2025 USD ($)	Aug. 12, 2025 USD ($)	Jul. 15, 2025 USD ($)	Jul. 15, 2025 CNY (¥)	Jun. 24, 2025 USD ($)	Jun. 24, 2025 CNY (¥)	Jun. 23, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 27, 2024 USD ($)	Dec. 24, 2024 USD ($)	Dec. 19, 2024 USD ($)	Dec. 03, 2024 USD ($)	Nov. 29, 2024 USD ($)	Nov. 25, 2024 USD ($)	Aug. 28, 2024 USD ($)	Aug. 20, 2024 USD ($)	Aug. 12, 2024 USD ($)	Jul. 31, 2024 USD ($)	Jan. 03, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Aug. 25, 2025 CNY (¥)	Aug. 12, 2025 CNY (¥)	Jun. 23, 2025 CNY (¥)	Mar. 24, 2025	Dec. 31, 2024 CNY (¥)	Dec. 27, 2024 CNY (¥)	Dec. 24, 2024 CNY (¥)	Dec. 19, 2024 CNY (¥)	Dec. 03, 2024 CNY (¥)	Nov. 29, 2024 CNY (¥)	Nov. 25, 2024 CNY (¥)	Aug. 28, 2024 CNY (¥)	Aug. 20, 2024 CNY (¥)	Aug. 12, 2024 CNY (¥)	Jul. 31, 2024 CNY (¥)	Jan. 03, 2024 CNY (¥)
Short-Term Bank Loans [Line Items]
Bank borrow																				$ 18,837,468	$ 11,322,440
Loan agreements, period																			1 year
Incurred interest expenses																				$ 411,068	$ 239,369	$ 5,319
Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Maturity date										Dec. 23, 2025	Dec. 18, 2025				Aug. 27, 2025
Taizhou Zhongjin [Member]
Short-Term Bank Loans [Line Items]
Maturity date									Dec. 26, 2025				Nov. 28, 2025	Nov. 24, 2025
Industrial and Commercial Bank of China [Member] \| Changzhou Zhongjin [Member]
Short-Term Bank Loans [Line Items]
Loan agreements, period																1 year	1 year	1 year
Industrial and Commercial Bank of China [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Loan agreements, period							1 year
Principal amount							$ 2,808,000																		¥ 20,000
Industrial and Commercial Bank of China [Member] \| Changzhou Zhongjin [Member]
Short-Term Bank Loans [Line Items]
Bank borrow																$ 1,426,000	$ 1,426,000	$ 1,426,000																	¥ 10,000	¥ 10,000	¥ 10,000
Maturity date																Aug. 11, 2025	Aug. 05, 2025	Jul. 28, 2025
Fixed interest rate																				3.00%
Industrial and Commercial Bank of China [Member] \| Changzhou Zhongjin [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Loan agreements, period		1 year
Maturity date		Aug. 11, 2026	Jun. 22, 2026	Jun. 22, 2026	Jun. 15, 2026	Jun. 15, 2026
Fixed interest rate		2.80%					2.80%													2.80%				2.80%	2.80%
Principal amount		$ 1,404,000																						¥ 10,000
Loans received			$ 1,378,000	¥ 10,000	$ 1,378,000	¥ 10,000
China Merchants Bank [Member] \| Changzhou Zhongjin [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Bank borrow								$ 1,404,000											$ 1,426,000								¥ 10,000											¥ 10,000
Loan agreements, period								1 year
Maturity date								Dec. 29, 2025
Jiangsu Bank [Member] \| Changzhou Zhongjin [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Fixed interest rate																										2.80%
Agricultural Bank of China [Member] \| Changzhou Zhongjin [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Bank borrow										$ 1,402,596	$ 1,389,960								$ 2,837,740										¥ 9,990	¥ 9,900								¥ 19,900
Loan agreements, period										1 year	1 year
Fixed interest rate																					2.95%
China Construction Bank [Member] \| Taizhou Zhongjin [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Bank borrow									$ 673,920			$ 1,401,192	$ 730,080	$ 673,920														¥ 4,800			¥ 9,980	¥ 5,200	¥ 4,800
Maturity date												Aug. 08, 2025
Fixed interest rate												2.95%								2.90%											2.95%
Bank of Nanjing [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Loan agreements, period															1 year
Bank of Nanjing [Member] \| Taizhou Zhongjin [Member] \| Loan Agreement [Member]
Short-Term Bank Loans [Line Items]
Bank borrow	$ 1,333,800														$ 1,354,700								¥ 9,500											¥ 9,500
Maturity date	Aug. 16, 2026
Fixed interest rate	2.90%														3.45%								2.90%											3.45%