shaking hands is one of the manners that maintain good relationship between people. it is necessary to be clear about when to shake hands.

　　first, when you meet someone for the first time, it's necessary to shake hands.second, if you meet your friend after a long separation, it is necessary to shake hands. thirds, if anyone offers to shake hands with you, you should of course shake hands it would be very bad manners to refuse. last, remember the conventions.usually, when two men or two women meet, it is usually the older who should first put out his or her hand first. when a man and a woman meet, it is the woman who should first offers her hand.

　　different cultures have different conventions. it is necessary to know when to shake hands and when not to.