How do people greet each other properly?

How do people greet each other properly? How do the Chinese people greet each other? how these people greet each other? how do two man greet each other? how do people usually greet each other when they meet for th how do the Chinese and Americans greet each other? People never greet each other on the How do the Chinese and the Americans greet each other? And h how do you men in Amerrica greet each other wehn they meet? People in different countries greet each other in different Chinese people greet each other like this "have you eaten?" greet each other 什么意思