Three people shake hands every two people, a **** to shake hands three times. Explanation: A, B, C three people, if every two people shake hands once, that is, there are 3 combinations of AB, AC, BC .

To avoid shaking hands with others with the left hand.

Just don't use the "sandwich" type of handshake (i.e., two hands shake one hand). Especially avoid shaking hands with both hands with the opposite sex.

Never cross handshakes. Shaking hands should be in accordance with the order of the line, especially careful not to shake hands with the other two handshake handshake form a cross shape.