Other Noncurrent Assets (Details 1)	Sep. 30, 2020 USD ($)
Other Assets, Noncurrent Disclosure [Abstract]
2021	$ 26,838
2022	26,838
2023	26,838
2024	26,838
2025	26,838
Thereafter	$ 876,592

Represents amortization of prepayment for lease of land use right in the fifth fiscal year.

No definition available.

Name:	cjjd_AmortizationOfFutureMinimumPrepaymentDueInFiveYears
Namespace Prefix:	cjjd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents amortization of prepayment for lease of land use right in the forth fiscal year.

No definition available.

Name:	cjjd_AmortizationOfFutureMinimumPrepaymentDueInFourYears
Namespace Prefix:	cjjd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents amortization of prepayment for lease of land use right in the third fiscal year.

No definition available.

Name:	cjjd_AmortizationOfFutureMinimumPrepaymentDueInThreeYears
Namespace Prefix:	cjjd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents amortization of prepayment for lease of land use right in the second fiscal year.

No definition available.

Name:	cjjd_AmortizationOfFutureMinimumPrepaymentDueInTwoYears
Namespace Prefix:	cjjd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents amortization of prepayment for lease of land use right in the next fiscal year.

No definition available.

Name:	cjjd_AmortizationOfFutureMinimumPrepaymentDueNextTwelveMonths
Namespace Prefix:	cjjd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents amortization of prepayment for lease of land use right after the fifth fiscal year following the latest fiscal year.

No definition available.

Name:	cjjd_AmortizationOfFutureMinimumPrepaymentDueThereafter
Namespace Prefix:	cjjd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

No definition available.

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