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Concentration and Risks (Tables) | 12 Months Ended
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Dec. 31, 2022
Customer concentration risk |
Concentration Risk [Line Items] |
Schedule of concentration risk | The following tables summarized the customer with greater than 10% of the total revenue and account receivables: ​
​ ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31, |
​ |  | 2020 |  | 2021 |  | 2022 |
Percentage of the total revenue |  | ​ | ​ |  |  |  | ​
Customer A |  | * | ​ | 12 | % | * | ​
​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31, |
​ |  | 2021 |  | 2022 |
Percentage of the account receivables |  |  |  |  | ​
Customer A |  | 36 | % | 21 | %
​
Supplier concentration Risk |
Concentration Risk [Line Items] |
Schedule of concentration risk | The following tables summarized the supplier with greater than 10% of the total purchase and payables: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31, |
​ |  | 2020 |  | 2021 |  | 2022 |
Percentage of the total purchase |  | ​ | ​ |  |  |  | ​
Supplier A |  | 16 | % | 20 | % | 20 | %
​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31, |
​ |  | 2021 |  | 2022 |
Percentage of the payables |  |  |  |  | ​
Supplier A |  | 28 | % | 31 | %

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