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Property, plant and equipment, net (Tables)
12 Months Ended
Dec. 31, 2021
Property, plant and equipment, net  
Schedule of property, plant and equipment

    

December 31, 

    

December 31, 

2021

2020

Building

$

5,228,347

$

5,631,049

Machinery and Production equipment

 

1,307,356

 

1,311,624

Electronic equipment

 

203,305

 

193,912

Office equipment

 

48,440

 

38,524

Automobiles

 

545,006

 

545,008

Construction in progress

 

343,401

 

133,339

Subtotal

 

7,675,855

 

7,853,456

Less: Accumulated depreciation

 

(5,571,908)

 

(5,375,544)

Property, plant and equipment, net

$

2,103,947

$

2,477,912