Quarterly report pursuant to Section 13 or 15(d)

Concentrations (Details) - Schedule of customers

v3.20.2
Concentrations (Details) - Schedule of customers - More Than 10% Revenues [Member]
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
A (Hebei Daopei, a related party) [Member]        
Supply Commitment [Line Items]        
Customer [1] 28.00% [1] 15.00%
B [Member]        
Supply Commitment [Line Items]        
Customer 28.00% 21.00% 29.00% 23.00%
C [Member]        
Supply Commitment [Line Items]        
Customer 18.00% 14.00% 18.00% 15.00%
D [Member]        
Supply Commitment [Line Items]        
Customer 14.00% 11.00% 14.00% 12.00%
[1] Less than 10%