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PROPERTY, PLANT AND EQUIPMENT, NET - Summary (Details)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
PROPERTY, PLANT AND EQUIPMENT, NET.      
Property, plant and equipment ¥ 746,973,134   ¥ 711,261,403
Less: Accumulated depreciation (423,860,768)   (313,904,608)
Property, plant and equipment, net 323,112,366 $ 45,509,425 397,356,795
Furniture      
PROPERTY, PLANT AND EQUIPMENT, NET.      
Property, plant and equipment 375,782,740   380,987,667
Machinery and equipment      
PROPERTY, PLANT AND EQUIPMENT, NET.      
Property, plant and equipment 173,869,199   135,365,960
Building      
PROPERTY, PLANT AND EQUIPMENT, NET.      
Property, plant and equipment 149,465,476   148,449,403
Office and electronic equipment      
PROPERTY, PLANT AND EQUIPMENT, NET.      
Property, plant and equipment 33,252,080   31,868,495
Leasehold improvement      
PROPERTY, PLANT AND EQUIPMENT, NET.      
Property, plant and equipment 10,792,479   10,778,718
Motor vehicles      
PROPERTY, PLANT AND EQUIPMENT, NET.      
Property, plant and equipment ¥ 3,811,160   ¥ 3,811,160