How do you reply when the other party says thank you for fuels?

Welcome to reply. It is polite to say thank you when the other person holds his fist. Responding to the other person's impoliteness is respect and courtesy to the other person, and the feelings are very good. Although the word "thank you" is short, it also sends a signal to the other party while expressing affirmation and respect for the other party's behavior. If you suddenly help others, it will greatly dampen your enthusiasm for helping others. Therefore, a thank you when necessary is the minimum respect for the fruits of others' labor.