As we have more communication with foreigners, we should pay more attention to the differences in the body language. 
As we see from the table, women in China often walk hand in hand, which is not always common in America. By comparison, Americans usually don't stand close to each other and they barely touch each other, especially for people of the same sex. Also, Americans think it rude to put out one's tongue, but the Chinese often use this gesture language when they are embarrassed or ashamed. Furthermore, Chinese people will pat children on the head if they like them, and Americans do so as well when they want to express favour or comfort.
In a word, differences do exist; only by fully understanding the differences in body language can we communicate appropriately.

Dear Robert, 
In China, we wave our hands to say “hello” or “goodbye”. We usually greet our guests by shaking hands with them. Some people may nod and smile instead of shaking hands. When you are introduced to a Chinese group, they may greet you by clapping their hands.
Like in many countries, we nod our heads to say “yes” and shake our heads to say “no”. People will hold their thumbs up to praise a person, if he does something great. Sometimes, we bow to show great respect and thanks to others.
I hope these information will be helpful to you.
Yours,
Li Hua