There are many rules when it comes to the rules of dining when you are out to dinner in Chinese culture. First and foremost you must sit to the right of your friend. Also the host will sit next to the door and the guest of honor would sit opposite of the door. If there are other guest of honor they should sit left of the main guest of honor. In Chinese culture most hosts will try to be polite and put food on your plate for you, it would be polite to eat it and say how good it was. If you wish to not eat it you could leave it there and just say thank you. When you eat don't eat everything off of your plate, if you eat everything the host will think that you want more food and give you more, leave food on your plate if you don't want anymore.
When you eat don't hog everything of a certain course, instead take little samples saving some for others. When you pour drinks pour others first and don't leave anyone out, this will seem as if you left them out, make a toast about your friendship or business. Make sure that you don't point at people when you hold chopsticks as this will seem impolite. Never take the last piece of food on a plate or it will seem as if your greedy. Don't use you chopsticks as forks because they aren't. If you use chopsticks and drop a piece of food make sure you pick it up again don't try and get another piece. Don't use your chopsticks as drum sticks, this is what beggars do and you don't want to act like that because it's impolite. Don't ever use your chopsticks as a toothpick, i don't know why you would even try that, and don't ever suck on your chopsticks.
Don't ever stick your chopsticks upright in a rice bowl because this is what you do at a funeral and if you do this it means that you think someone is about to die, this is also impolite to the seniors at the meal and it is impolite to the host. Never point the spout of the teapot at someone, this is just a common courtesy that you should do, you should point the spout at the seat with nobody there. If the fish has no meat on it's one side, do not flip the fish over by yourself, you should wait for a waiter to come or the host to flip the fish, if you flip the fish by yourself it is bad luck and it is a superstition that you will cause a fishing boat to flip over. There are many rules in Chinese culture, including table manners, if you wish your host to respect you I suggest that you learn these rules and learn to obey them.
Links- http://www.chinabravo.com/chinaGuide/TravelKit_detail.asp?id=202