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.