While those who hail from western nations are familiar with the typical handshake, there are a variety of different ways in which an initial greeting is exchanged in Asia.
For example, if you were to visit Sri Lanka, you would be greeted by the bringing together of two hands clasped almost in prayer followed by the phrase 'Ayubowan' which is meant to wish you longevity and good health. If you were to venture further east toward Korea, you would encounter a greeting that consists of a curt bow as a sign of respect.
Something to keep in mind is that while these gestures may seem out of the ordinary to you, it is the norm and it is encouraged to learn about these traits and do your best to reciprocate them as well!