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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Significant Accounting Policies |
Schedule of estimate useful life of property, plant and equipment |
Category |  | Estimated useful life |
Furniture and electronic equipment |  | 3 years |
Vehicles |  | 10 years |
Software |  | 5 years |
Leasehold improvements |  | Shorter of expected lives of leasehold improvements and lease term |
Schedule of estimated useful lives of the intangible assets |
Category |  | Estimated useful life
Customer relationships |  | 3 years
Trade names |  | 10 years
Technologies |  | 7 years
Schedule of online advertising and promotional service provider |
|  | For the year ended December 31, |
|  | 2018 |  | 2019 |  | 2020 |
Total number of online advertising and promotional service providers |  | 32 |  | 25 |  | 41 |
Number of online service providers that accounted for 10% or more of the Group's online advertising and promotional service |  | 2 |  | 2 |  | 2 |
Total percentage of the Group's online advertising and promotional service expenses that were paid to these service providers who accounted for 10% or more of the Group’s online advertising and promotional service expenses |  | 43 | % | 55 | % | 43 | %

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