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          Under snowy mountains
          
        
          
      
          
      
          
        
          
          China Daily |
          Updated: 2024-01-31 09:05
          
          
          
          
        


        
      
          
      
          
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   A drone image shows the construction site of the Qilian Mountains No 2 Tunnel at a valley more than 3,500 meters above sea level in Qinghai province. Dug by China Railway 16th Bureau Group Corp, the tunnel posed a major challenge in the construction of National Highway 569, which will link Qinghai with the Inner Mongolia autonomous region. [PHOTO/CHINA DAILY] 
 
           

           

           
 
           

          
          
        
          

        
        
      
    
        

        
          
          
          
        
          

      
          
      

    
          
    
          

      
          

        
      
          

    
          


    
          
      
          

        
          
        
          
        
      
          
      
          

        
        
      
      
    
      
          
    
          


    
      
      
      
          
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