hello ，Who can tell me how to connect this “Target” ？
I just want two actors to communicate on the blueprint .
One actor is a soccer , and the other actor is a soccer fream.
How to obtain soccer references through blueprint communication 
I don’t want to use “Cast” because it often prompts for performance loss
You could use Blueprint Interfaces :
Discarding direct communication, the cast is the least expensive system.
Yup, not sure why casts have so bad opinion around here.
Only bad aspect of casting is that you create dependency between 2 actors. So they will always be loaded, and if you have multiple actors of same class that cast to multiple actors of other class and so on, you may have everything always loaded in map.
For your code i would use bleuprint interfaces, if you may have different classes of actors that communicate. Like class_player, class_ball and class_team, all share some variable.
Or direct cast to. For easier use make pure cast with reading variable from other actor into single easy to use function (also pure). This way it will be like variable.
Some more tuts to watch. I think You want to make something like this system:
I see. It suddenly dawned on me. Thank you very much for your guidance 
Thank you very much for your guidance. I will take a look and research now
Thank you very much for your guidance. Wishing you a pleasant life, good health, and good night.
