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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