芮成钢：Observing passengers from 30 to 40 years old on the plane, the majority of people in the first class is reading,in the business class,people are reading magazines or doing business on computer,while people in the economy class are reading newspaper、watching movies and chatting. Most of the people are reading in the wating room for business class,most of the people are playing with their cellphones in the common wating room. Does the position affect the behavior or the behavior affect the position?