National science week: VR, robots and puzzles

        

      

      

        
          
          chinadaily.com.cn |
          Updated: 2020-08-27 13:23
          
          
          
          
        


        
      

      

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   Visitors are seen during the National Science and Technology Week in Nanjing, Jiangsu province. [Photo/Sipa] 
 
 

 

        


        
        
      

        
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