If the country that you are visiting is China, then you have to make sure that you actually do your homework. There are a lot of different things in China that you would not be able to find in your country. In fact, this suggestion is not just for you but for all people in the world. See, the Chinese are really proud of their culture and it is very unique. With that, do not expect some ways of life to be really the same as yours. There will be differences. Be aware of that.
One of the things that you have to understand is that the Chinese really are not into negative things. With that, if you are talking with a Chinese and then you talk about a lot of negative things, then you may not be going with the good side of that person. See, it is like you are being impolite to that person. Now, if you have been asked or invited and you are really not going, you may not want to say “no” immediately. Instead, you can go and tell them that you will still think about it or you can perhaps go. Just do not give a negative answer.