China is a country with a long history, so there are many customs here. Let me tell you some of them.
Firstly, you are supposed to shake hands when you meet someone for the first time. Secondly, you should bring a gift when you are invited to a party and be sure to arrive on time or ad few minutes earlier. Thirdly, when you have meals with others, it's rude to point at others with your chopsticks. And don't make noise when you have your soup.