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MEMBER MANAGEMENT FEES PAYABLE -Schedule of members management fees payable (Details) - CNY (¥) ¥ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Member Management Fee Payable [Abstract]
Member management fees payable	¥ 15,570	¥ 45,841

X

- Definition

Amount of member management fee payables

+ References

No definition available.

+ Details

Name:	yj_MemberManagementFeePayable
Namespace Prefix:	yj_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	yj_MemberManagementFeePayableAbstract
Namespace Prefix:	yj_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration