1939- 1940 At the World Expo held in new york and San Francisco, the slogan was: "Human beings are interdependent.
The first postwar World Expo was held in Brussels from 65438 to 0958 with the theme of "Science, Civilization and Humanity".
The theme of Osaka World Expo 1970 is "Human progress and harmony".
The theme of World Expo 1984 in New Orleans, USA is "World Rivers-Water-Source of Life".
1986 Vancouver Expo, with the theme of "Traffic and Communication-Human Development and Future".
At the 1993 Daejeon Professional Expo in Korea, the challenge on the road of vigorous development-a new way to take off was put forward.
The theme of Expo 2010 1998 in Lisbon, Portugal is "Ocean-Wealth of the Future".
The theme of Expo 2000 in Hanover, Germany is "Human, Nature, Science and Technology-a New World of Prosperity and Development".