answer: #Person1# and Bill are talking about Teachers' Day in China.
documents: #Person1#: Bill, do you know when did the Chinese begin to celebrate Teachers'Day?
  #Person2#: I know the Chinese teachers had their first festival in 1985.
  #Person1#: So, it is the 27th Teachers'Day.
  #Person2#: What will you do on Teachers'Day?
  #Person1#: I am going to send Mr. Li some flowers. What about you?
  #Person2#: I intend to invite him to dinner.