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Intangible assets, net (Details Narrative) - CNY (¥)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Intangible Assets Net      
Amortization expense ¥ 5,358,195 ¥ 6,379,240 ¥ 6,383,366
Impairment loss for intangible assets ¥ 3,854,547