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Accounts payable (Tables)
12 Months Ended
Dec. 31, 2019
Accounts payable  
Schedule of accounts payable
                         
 
As of December 31,
 
 
2017
 
 
2018
 
 
2019
 
 
RMB
 
 
RMB
 
 
RMB
 
Vendor payable
 
 
62,548,717
 
 
 
66,701,380
 
 
 
74,639,015
 
Shipping charges payable and others
 
 
11,788,991
 
 
 
13,283,638
 
 
 
15,789,367
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
 
74,337,708
 
 
 
79,985,018
 
 
 
90,428,382