answer: #Person2# tells Peter hotels often have no fourth floor because four sounds like death in Chinese.
documents: #Person1#: So I'm on the fifth floor? How come this hotel has no fourth floor.
  #Person2#: Four is an unlucky number here, Peter. Four sounds like death in Chinese. Hotels often have no fourth floor.
  #Person1#: I see. Oh, I know what I wanted to ask. How much should I tip this guy?
  #Person2#: People don't usually tip here, but you can. Fifty dollars should be more enough.