Adding friends is a means of making friends, which requires games or software that can be networked. Stand-alone games can't be networked, so you can't add friends. In order to get rid of single life, people make friends with others. The type of friends can be girlfriends, boyfriends or ordinary friends. It is pointed out that it mainly includes one party's trust in the other party, giving the other party trust, allowing the other party to associate with themselves, and making friends interactively.