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Inventories, Net (Tables)
12 Months Ended
Dec. 31, 2024
Inventory, Net [Abstract]  
Schedule of Inventories, Net

Inventories, net consist of the following:

 

As of
December 31,

   

2023

 

2024

   

RMB

 

RMB

Raw materials

 

56,952,428

 

 

63,285,324

 

Work in process

 

130,609,171

 

 

119,439,099

 

Finished goods

 

90,377,688

 

 

68,333,552

 

Less: write-down of inventories

 

(265,064,301

)

 

(221,191,557

)

Inventories, net

 

12,874,986

 

 

29,866,418