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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

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No definition available.

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- Definition

Amount of revenue recognized from goods sold, services rendered at marketing and branding service revenues.

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No definition available.

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Name:	uk_MarketingAndBrandingServiceRevenues
Namespace Prefix:	uk_
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- Definition

Amount of other service revenue to related parties.

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No definition available.

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Namespace Prefix:	uk_
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Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	uk_
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Balance Type:	debit
Period Type:	duration

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No definition available.

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