answer: #Person2# sees #Person1# off and thanks #Person1#. They hope to see each other soon.
documents: #Person1#: Thank you very much for everything you have done for me during my stay in China.
  #Person2#: And I must thank you again for your generous help.
  #Person1#: The help is mutual. I must thank you to see me off. My wife and I will be looking forward to seeing you. You will come to see us, won't you?
  #Person2#: I promise I will take the first chance to call on you. Please send your wife with my best regards.