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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventories
 
 
As of December 31,
 
 
 
2017
 
 
2018
 
 
 
RMB
 
 
RMB
 
Raw materials
 
 
856,151,730
 
 
 
1,337,270,185
 
Work-in-progress
 
 
1,247,357,915
 
 
 
1,553,346,553
 
Finished goods
 
 
2,170,220,346
 
 
 
2,852,711,200
 
Total
 
 
4,273,729,991
 
 
 
5,743,327,938