Greetings in Chinese culture are a serious bit different than western culture. I never thought that I could approach to this before until I took an outing in Hangzhou, Zhejiang province of China. Chinese people generally greet each other by title and last name. Some take it as reminders others take it as omens and charms.
Some Chinese contemplate it rude to exhibit the inside of your mouth. When positioned on a guy it means that you will have problems trying to keep your money that you've earned.