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Inventory (Tables)
6 Months Ended
Jun. 30, 2025
Inventory [Abstract]  
Schedule of Inventory
   As of December 31, 2024   As of June 30, 2025 
   RMB   RMB   US$ 
       (Unaudited 
Raw materials   3,358    5,166    720 
Low value consumables   34    34    5 
Finished goods   6,492    7,780    1,087 
Less: inventory impairment   (12)   -    - 
    9,872    12,980    1,812