Dont eat anything until your host does, or until your host insists. This is a minor big thing.
In some parts of China, it is rude to taste anything until three main dishes are on the table. Other places they dig right in. Watch your host.
A foreigner who has spent the last six years performing a variety of IT tasks in China, Doctor John offers 12 tips for getting IT done in China. (Doctor John is a pseudonym.)