Prepayments	3 Months Ended
Sep. 30, 2022
Prepayments and Deferred Expenses Disclosure [Abstract]
PREPAYMENTS	NOTE 3. PREPAYMENTS Prepayments primarily include prepayments for services, equipment, rent and property management fees. As of September 30, 2022 and June 30, 2022, prepayments were $13,707 and $33,837, respectively.

The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.

No definition available.

Name:	lddc_PrepaymentsAndDeferredExpensesDisclosureTextBlock
Namespace Prefix:	lddc_
Data Type:	dtr:textBlockItemType
Balance Type:	na
Period Type:	duration