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MEMBER MANAGEMENT FEES PAYABLE -Schedule of members management fees payable (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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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

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- References No definition available. + Details
Name: | yj_MemberManagementFeePayableAbstract
Namespace Prefix: | yj_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration