Annual report pursuant to Section 13 and 15(d)

Condensed Parent Company Financial Information (Details)

v3.21.2
Condensed Parent Company Financial Information (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]      
Statutory reserve $ 15,751,712 $ 15,748,751 $ 14,760,112