Hello. 你好。
2. Good morning. 早上好。
Good afternoon. 下午好。
Good evening. 晚上好。
3. How are you? 你好吗?
How are you doing? 你好吗?
How ya doing? (Informal) 你好吗?(非正式)
4. Fine. How about you? 好。你呢?
5. Okay. Thanks. 好。谢谢。