In the salutation by the hand should shake hands at the other end, and naen eyes at the other end with the hand because they are considered as showing respect.
To greet with a handshake. Should hold each other tight. And should be exchanged with the other party during the handshake because it was considered a sign of respect as well.
In the greeting with a handshake. Should hold each other tight. And should make eye contact with each other with during holding hands because it is to show respect.