salutations

/ˌsæl.jəˈteɪ.ʃən/

the act of greeting someone致意；问候
[count]
A handshake and saying “hello” are common salutations.
握手和说“你好”都是常见的问候。
[noncount]
Shaking hands is a form of salutation.
握手是一种问候方式。