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v3.22.4

Advances to Suppliers | 6 Months Ended
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Jun. 30, 2022
Advances to Suppliers |
Advances to Suppliers | Note 6 – Advances to Suppliers ​ Advances to Suppliers consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ | ​ | 2022 | ​ | 2021
Advances to suppliers | ​ | $ | 3,194,212 | ​ | $ | 3,459,374
Allowance for doubtful accounts | ​ |  | (39,128) | ​ |  | (38,746)
Advances to suppliers, net | ​ | $ | 3,155,084 | ​ | $ | 3,420,628
​ The movement of allowance for doubtful accounts are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2022 |  | 2021
Balance at beginning of period | ​ | $ | 38,746 | ​ | $ | 179,095
Change of allowance for doubtful accounts | ​ |  | 21,521 | ​ |  | (144,549)
Write off | ​ | ​ | (18,565) | ​ | ​ | (5)
Translation adjustments | ​ |  | (2,574) | ​ |  | 4,205
Balance at end of period | ​ | $ | 39,128 | ​ | $ | 38,746
​

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