In China one cannot gulp down the dumpling in one go
Chefs in China get annoyed if you ask for more soy sauce
In china make sure that you're handling the teapot by using one hand only.
In China one must avoid crossing their chopsticks on the plate
So if you happen to visit China in near future, then make note of the above pointers and follow them religiously.
In China, flipping a whole fish after eating one side of it is said to bring bad luck.