answer: #Person1# and #Person2# are talking about their successful new product which made a record sale and there is much efforts behind it.
documents: #Person1#: I am so happy to know that the promotion campaign for our new product is very successful. We just made a record sale this season. 
  #Person2#: That is very encouraging news. I heard that the marketing department has done a three months research, they sent the feedback information to the research and development center by the end of every month. That is to say, the R&D center redesigned the product twice before it was launched into the market. 
  #Person1#: It is not an easy job. How do you like the advertisement for the new product? 
  #Person2#: That is the best one I have seen. I am sure our target customers, young people will love it. 
  #Person1#: Certainly.