Step1
If you're at a restaurant where there are pictures on the menu, you should know that in Chinese meals, dishes are served in a certain sequence. Cold dishes, the equivalent of Western appetizers, are served first and should be ordered first, followed by hot dishes, soups and dessert.
Step2
In most restaurants, ordering seafood goes beyond just picking an item on a menu. You'll actually pick your fish out of the tank prior to dining, much the way Western restaurants serve lobster. Only in China, you will choose everything from flounder to oysters. (On the plus side, if you don't know the language, this makes it really easy to order seafood.)
Step3
Tea is the most common drink, and water isn't usually served dining out. If you order alcoholic drinks, or if your host does, be prepared for a lot of drinking (though you yourself don't have to drink more than you want). "Gambei" is the toasting word.
Step4
You'll most likely have your own dish of rice, but the rest of the food will be placed in the center of the table. This will likely be a raised platform that spins, allowing you to turn it to get to the dish you want. Take a little bit of what you want and put it in your own bowl.
Step5
If your order fish, it's going to come with it's head still attached. In formal - or even informal - dining, the fish should be pointed at the most honored or senior guest. As a foreigner, that might well be you. You can demur and aim it at someone else, but choose wisely or you'll just end up staring down the fish again.
Step6
When the soup comes, there are spoons. In fact, you'll see these from the start. You can also use them to scoop food into your rice bowl, or just plain eat with them if you really can't use chopsticks. You'll amuse your hosts, but they won't laugh at you.
Step7
Desert will again be communally served, not placed individually before you. It's often some form of pastry or dim sum dish, and can be warm or cold.