In China, when invited to dine at a restaurant, the guest
typically orders only a few, usually simple dishes. He would also
persuade the host to keep things simple by not over-ordering. This
is done out of courtesy because, according to Chinese custom, the
host usually pays the bill. A foreigner might inadvertently offend
the host by offering to pay his share. "Going Dutch" isn't a
general practice in China, although things are slowly changing.
With regard to tips, one doesn't usually leave any, although some
establishments would impose a 10 percent service charge. If so,
this is usually noted on the menu.