According to China people's personality and customs, tell him what English compositions he should pay attention to when living in China.

In China, it's a traditional custom for us to smile. When we give it to the elderly, we can't give them what we have to use. It's rude. In children, we are more like older men as elders. We can't teach bad children and swear words for one child. When we go to other people's homes, we should give priority to the owner, and we can't do whatever we want. We must get the owner's permission to touch things, which will make the owner very angry. We should always smile at people.