Other Noncurrent Assets (Details 1)	Dec. 31, 2019 USD ($)
Other Assets, Noncurrent Disclosure [Abstract]
2020	$ 26,966
2021	26,966
2022	26,966
2023	26,966
2024	26,966
Thereafter	$ 755,191

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

No definition available.

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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.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration