Everyone knows the Olympic Games very well. It can be said that it is a household name, but the World Expo may be unfamiliar to the people of China. First of all, the World Expo is a special name, which is different from the trade fairs that people often see now. Expo is not for commercial purposes, but for countries around the world to show their achievements and development prospects in society, economy, culture, science and technology. Its participants are mainly governments and other international economic organizations. The World Expo in the present sense began with the World Expo held in London in 185 1 and has been held in 13 countries and 24 cities all over the world. Hosting the World Expo will play a great role in the social and economic development of the host country, and will also play a great role in promoting exchanges and cooperation among countries around the world. Therefore, all member countries in the world are eager to host the World Expo.