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Concentration and Risks (Tables) | 12 Months Ended
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Dec. 31, 2025
Customer concentration risk |
Concentration and Risks |
Schedule of concentration risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31, |
​ | ​ ​ ​ | 2023 | ​ ​ ​ | 2024 | ​ ​ ​ | 2025 |
Percentage of the total revenue |  | ​ | ​ | ​ |  | ​ | ​
Customer A[1] |  | * | ​ | 15 | % | 18 | %
​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31, |
​ | ​ ​ ​ | 2024 | ​ ​ ​ | 2025 |
Percentage of the account receivables |  | ​ |  | ​ | ​
Customer A[1] |  | 81 | % | 91 | %
* Less than 10% [1] A related party of the Group
Supplier concentration Risk |
Concentration and Risks |
Schedule of concentration risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31, |
​ | ​ ​ ​ | 2023 | ​ ​ ​ | 2024 | ​ ​ ​ | 2025 |
Percentage of the total purchase |  | ​ | ​ | ​ |  | ​ | ​
Supplier A |  | 15 | % | 13 | % | 14 | %
​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31, |
​ | ​ ​ ​ | 2024 | ​ ​ ​ | 2025 |
Percentage of the account payables |  | ​ |  | ​ | ​
Supplier A |  | 16 | % | 17 | %
​

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