In Chinese culture, it is very common to offer food to your visitors. But the visitor will always say "no", even when he's hungry. Why? Often you'll get food anyway if you don't say it loud enough.
At dinner people will ask you if you want more beer. You say no, but they will poor it in anyway. Why??
First, some people don't really want to offer you food. They sometimes offer it as a sign of politeness.
So why will everybody say "no"? It is also politeness! To say "yes" is very rude. That's why you'll get your beer anyway. The correct way to stop them pouring in is to not to drink from your glass, even when it's full…