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Taxes - Taxes payable (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Taxes
Corporation income tax payable	$ 578,445	$ 415,488
Other tax payable	245,256	155,866
Total	$ 823,701	$ 571,354

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Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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