（1） You are supposed/expected to…
（2） You should…
（3） You are not supposed to…
I’m very happy to hear that you’re coming to china next week. I hope to see you soon.
As we all know, different countries have different customs. So the manners in China are very different from those in your country. Let me tell you something about customs and manners in our country.
First, we Chinese are supposed to shake hands when we meet for the first time. Then we greet each other. After that, you can talk about something relaxing. But you are not supposed to talk about someone’s salary, age and so on. Second, we use chopsticks to have meals while you use your forks at table. Also, it’s bad manners to talk too much when you’re having meals.
I hope you’ll have a wonderful time in our country.