The second is communication. Communication between people must first have a common language, that is, things with common hobbies. So chess, movies, sports and music are all good themes for making friends.
The third is the so-called cultivation of sentiment, which generally requires more experienced chess players to understand. Win without arrogance and lose with grace, look at chess without words, be a real gentleman, start without a gentleman, look at the character of chess and so on.
Hope to adopt.