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Inventories, Net - Schedule of Inventories, Net (Details)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Inventory, Net [Abstract]      
Raw materials ¥ 63,285,324   ¥ 56,952,428
Work in process 119,439,099   130,609,171
Finished goods 68,333,552   90,377,688
Less: write-down of inventories (221,191,557)   (265,064,301)
Inventories, net ¥ 29,866,418 $ 4,154,807 ¥ 12,874,986