In the game, there is a column on the player's game panel where they can send messages. It is a bit like a chat software. The account name is the number of each player.

Just search for the player number to add friends, and the account points there are the same as the points entered into the game.

But when the player and the player's current dimensional world are different, an exclamation mark will be displayed in the game, which means that one of them has entered the game ...