What's up? 近况如何?
What's new? 有什么新鲜事?
What's happening? 在忙什么?
How are you? 你好吗?
Nice to meet you. 很高兴见到你.
Nice to see you again. 很高兴再见到你.
How have you been? 你过得怎么样?
Long time no see. 好久不见.
