It's not too late for you to understand now China has always advocated reciprocity. If you invite me to dinner, I will buy you a bottle of water. People like Xiao, who cheat the landlord into paying the bill because they think they are smart, will not get along well for long. After a long time, everyone understands what is going on (no one is a fool, but sometimes everyone doesn't want to say anything unfair, but they all see it. In the future, you don't want to lose face, just do what you want. AA system can avoid this kind of dispute.
Be careful when making friends, make friends with the right ones and the wrong ones, and have a steelyard in your heart. University is a good place to hone people. Learn slowly! People always grow up in setbacks, you still have to choose what kind of person you want to be! !
Good luck to the landlord!