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Summary of Significant Accounting Policies (Details) - Schedule of Amounts and Percentages of Total Revenues
¥ in Thousands, $ in Thousands
 6 Months Ended
Jun. 30, 2024
CNY (¥)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
CNY (¥)
Schedule of Amounts and Percentages of Total Revenues [Line Items]      
Total revenues amount ¥ 13,190 $ 1,815 ¥ 1,896
Total revenues percentage 100.00% 100.00% 100.00%
Sourcing services [Member]      
Schedule of Amounts and Percentages of Total Revenues [Line Items]      
Total revenues amount ¥ 75 $ 10 ¥ 1,435
Total revenues percentage 0.60% 0.60% 75.70%
Product sales [Member]      
Schedule of Amounts and Percentages of Total Revenues [Line Items]      
Total revenues amount ¥ 12,389 $ 1,705
Total revenues percentage 93.90% 93.90%
Battery-swapping services [Member]      
Schedule of Amounts and Percentages of Total Revenues [Line Items]      
Total revenues amount ¥ 726 $ 100 ¥ 461
Total revenues percentage 5.50% 5.50% 24.30%