Let me tell you something about how to behave properly in Changzhou. When you meet people for the first time, you should say hello and shake hands with them. We Chinese don't greet each other with a kiss. When you eat with Chinese, you should try not to make too much noise. Also, you'd better not talk with others with your mouth full. Before you leave, wait for everyone to finish. When you are in public places, don't talk loudly. It's rude to push in before others. You should wait in line.
I hope these tips are helpful to you.