When traveling, what should I do if I am in a bad mood with someone I hate?

Just enlarge your mind and learn to be tolerant. After all, like a game, it is also a faint fate. If you hate him, you will be in a bad mood, so don't be angry, because if he knows, he will think that such behavior will make a person unhappy and unfocused. The happier you are, the less you care about him, and he may not pretend in front of you. There is a limit to how thick-skinned he is.