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Selling, General and Administrative Expenses (Tables) | 12 Months Ended
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Dec. 31, 2022
Selling, General and Administrative Expenses |
Schedule of selling, general and administrative expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31,
​ |  | 2020 |  | 2021 |  | 2022
Employee compensation | ​ | 1,687,945 |  | 2,894,308 |  | 4,532,553
Marketing and promotional expenses | ​ | 675,142 |  | 1,428,290 |  | 1,775,539
Rental and related expenses | ​ | 498,601 |  | 845,512 |  | 1,336,575
Professional services | ​ | 307,658 |  | 521,327 |  | 944,160
IT consumable, office supply and other low value consumable | ​ | 69,954 |  | 247,828 |  | 545,498
Depreciation and amortization expenses | ​ | 325,478 | ​ | 337,708 | ​ | 484,363
Other Taxes and Surcharges | ​ | 70,220 | ​ | 198,572 | ​ | 285,076
Travel and entertainment expenses | ​ | 39,328 | ​ | 80,726 | ​ | 162,924
Expected credit losses | ​ | 9,654 | ​ | 54,332 | ​ | 48,707
Others | ​ | 248,291 |  | 269,529 |  | 421,724
Total | ​ | 3,932,271 |  | 6,878,132 |  | 10,537,119

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