answer: Mr. Tang and Mr. Allen negotiate over Mr. Tang's salary. They agree on 4000 yuan a month in the end.
documents: #Person1#: Mr. Tang, we have decided to hire you. How much do you expect to get a month?
  #Person2#: I'm making three thousand yuan a month at my present work. I should not, of course, make a change for less. Could you provide me with a monthly salary of four thousand yuan?
  #Person1#: I don't think we can give you that much as the starting salary.
  #Person2#: You know, Mr. Allen, Nowadays this starting salary is not high based on my skills and experience.
  #Person1#: Maybe, but there are many fringe benefits here.
  #Person2#: What are they?
  #Person1#: Additional to medical benefits, we also offer a rent free house and the use of a car.
  #Person2#: But I have my own car and my own house.
  #Person1#: OK, 4000 yuan a month.
  #Person2#: Thank you very much.
  #Person1#: Not at all, it's reasonable.