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v3.21.1

Risks and Concentration (Tables) | 12 Months Ended
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Dec. 31, 2020
Risks and Uncertainties [Abstract] |
Schedule of accounts receivable |
|  | As of December 31, |
|  | 2019 |  |  | 2020 |
Receivables from Franchisee A |  |  | 11 | % |  |  | 19 | %
Receivables from Franchisee B |  |  | 11 | % |  |  | 19 | %
Receivables from Franchisee C |  |  | * |  |  |  | 19 | %
Receivables from Franchisee D |  |  | * |  |  |  | 11 | %
Receivables from Franchisee E |  |  | 13 | % |  |  | * |
Receivables from Franchisee F |  |  | 15 | % |  |  | - |
* | Less than 10%

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