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          Putting in the prep
          
        
          
      
          
      
          
        
          
          chinadaily.com.cn |
          Updated: 2025-12-25 11:32
          
          
          
          
        


        
      
          
      
          
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   A maintenance worker checks a CR200J bullet train in Chongqing. [Photo by Su Zhigang/Provided to chinadaily.com.cn] 
 
           

           

          Workers are focusing on comprehensive maintenance and inspection of key components such as the EMU braking system, wheel sets, running gear and passenger service facilities to ensure the safety of passengers.
           

          
        
          

        
        
      
          
        
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