How do I join two lines in vi?

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后悔当初 2020-12-07 08:41

I have two lines in a text file like below:

S_F
_ID_T_O.DAT


      
      
        
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                   半阙折子戏
                                             
                
                
                (楼主)
            
              
              
                2020-12-07 09:29
              

            
            
                        
This should do it:

J
    
             
                                                        
            
            
              
                
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