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v3.21.1

Combined and Consolidated Statements of Operations (Parentheticals) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Statement [Abstract] |  |  |
Marketing and branding service revenue | ¥ 77,046 | ¥ 117,796 |
Other service revenue | 19,955 | 12,116 | 4,435
Workspace membership | 12,564 | 22,336 | 11,964
Marketing and branding service | ¥ 11,504 | ¥ 57,444 |

X
- References No definition available. + Details
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Namespace Prefix: | uk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered at marketing and branding service revenues. + References No definition available. + Details
Name: | uk_MarketingAndBrandingServiceRevenues
Namespace Prefix: | uk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of other service revenue to related parties. + References No definition available. + Details
Name: | uk_OtherServiceRevenueToRelatedParties
Namespace Prefix: | uk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
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Namespace Prefix: | uk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration