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SCHEDULE OF ROLL FORWARD OF VALUATION ALLOWANCES OF DEFERRED TAX ASSETS (Details) - CNY (¥)	6 Months Ended	12 Months Ended
	Mar. 31, 2025	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Balance	¥ 3,644
Addition of valuation allowance	108	3,644
Balance	¥ 3,752	¥ 3,644

X

- Definition

Deferred tax assets valuation allowance additions.

+ References

No definition available.

+ Details

Name:	JLHL_DeferredTaxAssetsValuationAllowanceAdditions
Namespace Prefix:	JLHL_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration