Hello! / Hi!

Good morning!

Good afternoon!

Good evening!

How are you？

How are you doing？

Long time no see.

Nice to meet you.

Nice to see you again.

How have you been？

How is it going？

What's up？（较为随意的问候方式）

这些问候语可以根据不同的场合和对象进行选择和使用。希望这些信息对你有所帮助!