Liming,I will give you some advice on how to cope with the situation.
First, A gift. You can bring some small gifts, for example, a box of chocolate will be a good choice, and the hosts will be very pleasent.
Second, Be sure to be on time. You can arrive there ten minutes earlier.
Third, When you are having dinner, you need to show your enjoyment to the dishes. Therefore, the hosts will be very happy.
Fourth,After dinner,you'd better not stay there for too long.
Last, You should show your sincere to the host when you are leaving.