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          Elderly man teaches teens about ancient inventions
          
        
          
      
          
      
          
        
          By Deng Rui and Tan Yingzi | 
          chinadaily.com.cn |
          Updated: 2022-03-07 11:02
          
          
          
          
        


        
      
          
      
          
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   In March last year, Tang Jialu, 74, established a research center in Chongqing to teach teenagers about ancient Chinese scientific and technological inventions. He restored or built new models of many devices. [Photo by Zhang Hao/For chinadaily.com.cn] 
 
           

          
          
        
          

        
        
      
          
        
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