In ancient agricultural society, people often carried out trading activities on harvest festivals, which later evolved into a large-scale trade exhibition gathering held at a scheduled place on a regular basis. This is the earliest form of the World Expo. In the 5th century, Persia held a market function outside the exhibition. In the 65,438+08 century, people increasingly thought of organizing similar fairs, but only exhibitions for sale, publicity and display. 179 1 Prague, the Czech capital, held a similar exhibition for the first time. With the progress of science and technology and the development of productivity, the scale of the exhibition has gradually expanded, and the scope of exhibitors has expanded to the whole country and even abroad. Developed into the current World Expo.