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Taxes - Schedule of Valuation Allowance (Details) - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Schedule of Valuation Allowance [Abstract]
Balance at beginning of the year	$ 3,469,300	$ 2,913,055
Addition	591,395	720,097
Less: Reversal		(163,852)
Balance at end of the year	$ 4,060,695	$ 3,469,300

X

- Definition

Addition.

+ References

No definition available.

+ Details

Name:	rgc_DeferredTaxAssetsAddition
Namespace Prefix:	rgc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of deferred tax assets reversal.

+ References

No definition available.

+ Details

Name:	rgc_DeferredTaxAssetsReversal
Namespace Prefix:	rgc_
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_ValuationAllowanceAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration