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Research and Development Expenses (Tables) | 12 Months Ended
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Dec. 31, 2025
Research and Development Expenses |
Schedule of research and development expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31,
​ | ​ ​ ​ | 2023 | ​ ​ ​ | 2024 | ​ ​ ​ | 2025
Employee compensation | ​ | 8,998,415 | ​ | 8,829,163 | ​ | 7,641,448
Design and development expenses | ​ | 3,019,403 | ​ | 2,561,769 | ​ | 1,699,274
Depreciation and amortization expenses | ​ | 720,737 | ​ | 991,074 | ​ | 710,737
Rental and related expenses | ​ | 273,493 | ​ | 250,597 | ​ | 235,535
Travel and entertainment expenses | ​ | 135,891 | ​ | 82,955 | ​ | 55,807
Others | ​ | 283,460 | ​ | 321,746 | ​ | 262,192
Total | ​ | 13,431,399 | ​ | 13,037,304 | ​ | 10,604,993
​

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