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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2022
Property and Equipment, Net [Abstract]  
Schedule of Property and Equipment, Net Property and equipment, including those held under capital leases, consists of the following:
   As of December 31, 
   2021   2022   2022 
   RMB   RMB   USD 
At cost:            
Computer and transmission equipment   7,472    8,953    1,298 
Furniture, fixtures and office equipment   584    1,937    281 
Total   8,056    10,890    1,579 
Less: accumulated depreciation   (6,382)   (8,155)   (1,182)
Property and equipment, net   1,674    2,735    397