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v3.22.1

CONCENTRATION AND RISKS - Additional Information (Details) | 1 Months Ended | 12 Months Ended
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Jul. 31, 2015 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Increase (Decrease) In Foreign Currency Exchange Rate | 20.00% | 2.30% | 6.50% | (1.60%)

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- Definition Percentage Of Increase (Decrease) In Foreign Currency Exchange Rate, Translation. + References No definition available. + Details
Name: | yj_PercentageOfIncreasedecreaseInForeignCurrencyExchangeRateTranslation
Namespace Prefix: | yj_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration