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          Combo photos tell China's development in past 70 years
          
        
          
      
          
      
          
        
          
          Xinhua |
          Updated: 2019-09-22 07:26
          
          
          
          
        


        
      
          
      
          
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   Top: File photo taken in 1960 by Huang Jingda shows a police officer on duty at the Chang'an Avenue in Beijing, capital of China. Bottom: Photo taken on June 26, 2019 by Zhang Chenlin shows police officer Ren Junhan on duty at the Chang'an Avenue in Beijing. Big data and remote control have been applied in traffic flow prediction and traffic light control as traffic management today is geared to digital, intelligent and modern directions. [Photo/Xinhua] 
 
           

           

          
        
          

        
        
      
          
        
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