China is a country with a long history, so there are many customs in it.
Firstly, you are supposed to shake hands when you meet someone for the first time. Secondly, when
you eat dinner with other people, it's rude to point at others with your chopsticks. Besides, if you are
going to a party. you are supposed to arrive at the party on time, or a few minutes late. You are not
supposed to give a clock or a watch to your friends as a present, because it means "death" in Chinese.
"When in Rome, do as the Romans do." If you are going to China, please follow the rules.