Kenneth Lieberthal from the Brookings Institution said that the purpose of the trip is to give both parties an opportunity to get to know each other and develop some personal chemistry.
Begin with people who are in the right technical area, since you're most likely to strike a chord there, but talk to others as well -- they may have hidden interests, or they might be interested in branching out, or there might be better personal chemistry, or your first choice might simply be too busy. 在和专业人士开始探讨这个问题之前,你最好能够掌握问题中的某一部分,并且和这人交谈时要了解:他们是不是将自己的兴趣没有说出来,或者他们感兴趣的仅是其中的一部分,或者你们有很好的私人关系,或者你选择的第一个问题仅仅是比较麻烦。