Some tips about using chopsticks:

It is inevitable to use chopsticks when foreign friends are enjoying Chinese cuisine. So how about learning how to use chopsticks? You will find these two sticks are interesting! Here are some tips about using chopsticks:
Use the serving chopsticks or turn your chopsticks around when use them to serve others. It is both for our health and showing your respect to others.
You’d better not take your chopstick and turn them into forks by poking into the food. You must use the chopstick to pick up the piece. 
If you pick up a piece with a chopstick and drop it, don’t attempt to pick up. Try another piece instead.
It is very impolite to start playing the drums with your chopsticks, or use the chopsticks as tooth picks, or suck on them.
Don’t vertically place your chopsticks on top of a bowl, because it resembles death.