Noise and Smoking
Be warned that in some popular local restaurants, especially in the evenings, the noise of uninhibited chatter and drinking games can become very loud. Smoking is also permitted in most Chinese restaurants. A way round this, in larger restaurants, is to request a side room for your meal, which will have its own door to insulate you from the noise and smoke.
Eating noisily and with one's mouth open may be considered rude in the West. However, slurping, smacking the lips and leaving the mouth open when eating can be viewed as demonstrating enjoyment of the food and a friendly atmosphere in China.