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Property, Plant and Equipment, Net (Tables)
12 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
  

As of

March 31,

  

As of

March 31,

 
   2022   2021 
Buildings  $15,345,997   $12,813,510 
Machinery   1,918,918    2,867,046 
Furniture, fixture and electronic equipment   179,667    231,929 
Vehicles   176,606    147,132 
Total property plant and equipment, at cost   17,621,188    16,059,617 
Less: accumulated depreciation   (6,374,373)   (5,545,586)
Property, plant and equipment, net  $11,246,815   $10,514,031