Exhibition is a kind of publicity activity to display products and technologies, expand channels, promote sales and spread brands. In practical application, the name of the exhibition is quite complicated. As a concept, exhibition is defined as "a temporary organization that publicly displays industrial and agricultural products, handicrafts, works of art, books, pictures and various important items, specimens, models, etc." For the masses to visit and appreciate in a fixed or itinerant way. "

This definition doesn't seem accurate, which is worth exploring. As far as trade shows are concerned, an American businessman defines it as: doing the biggest business with the shortest time, the smallest space and the least cost. But this so-called definition is more like a social form that describes the author's attempt to define it as the exchange of products, services and information through exhibitions at a fixed or a series of places within a specific date and time limit. Among them, information contains many contents, such as propaganda achievements, propaganda policies, popularization of scientific and technological knowledge, establishment of company image, understanding of market development trends, and even obtaining information through improper means.