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Income Taxes, Deferred Tax Assets and Deferred Tax Liabilities (Tables)
9 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]  
Schedule of provision for income taxes expenses
    Three months ended
September 30,
    Nine months ended
September 30,
 
    2019    2020    2019    2020 
PRC income tax:                    
Current  $-   $-   $-   $- 
Deferred   -    -    -    - 
   $-   $-   $-   $- 
Schedule of income tax reconciliation
   Three months ended
September 30,
   Nine months ended
September 30,
 
   2019   2020   2019   2020 
Income (Loss) before income taxes   $(1,787,068)  $41,715   $(6,928,575)  $(3,510,563)
United States federal corporate income tax rate    21%   21%   21%   21%
Income tax (credit) expenses computed at United States statutory corporate income tax rate    (375,285)    8,760    (1,455,001)   (737,218)
Reconciling items:                     
Rate differential for PRC earnings    (42,412)   15,480    (228,917)   (79,959)
Non-deductible expenses    69,240    38,529    162,110    187,432 
Share based payments    83,190    33,973    90,885    129,333 
Valuation allowance on deferred tax assets    265,267    (96,742)   1,430,923    500,412 
Income tax expenses   $-   $-   $-   $- 
Schedule of deferred tax assets and liabilities
   December 31,   September 30, 
   2019   2020 
Deferred tax assets        
Trade accounts receivable  $1,225,916   $1,263,658 
Inventories   1,026,483    476,490 
Property, plant and equipment   768,975    418,043 
Provision for product warranty   561,733    551,844 
Net operating loss carried forward   29,361,274    30,734,758 
Valuation allowance   (32,944,381)   (33,444,793)
Deferred tax assets, non-current  $-   $- 
           
Deferred tax liabilities, non-current  $-   $- 
Schedule of unrecognized tax benefits excluding interest
   Gross UTB   Surcharge   Net UTB 
Balance as of January 1, 2020  $7,042,582   $       -   $7,042,582 
Increase in unrecognized tax benefits taken in current period   179,436    -    179,436 
Balance as of September 30, 2020  $7,222,018   $-   $7,222,018