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Property and equipment, net (Details Narrative)
12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 114,624 ¥ 807,722 ¥ 464,999 ¥ 294,514