Interaction between the international and regional In 1851,Paris hosted the first International Expo,now there have been 124 sessions of the International Expo held in 27 countries.The In- ternational Expo has far-fetching influence on the civilization and social advancement of mankind;new products and technologies are introduced that boost economic and cultural development;new ideas are popularized to broaden horizons for human beings;and exchange and cooperation between different cultures are promoted for mutual benefit.Looking back over its 150-year history,we find that the International Expo and regional development are interdependent. Interaction between the international and regional In 1851, Paris hosted the first International Expo, now there have been 124 sessions of the International Expo held in 27 countries. The In-ternational Expo has far-fetching influence on the civilization and social advancement of mankind; new products and technologies are introduced that boost economic and cultural development; new ideas are popularized to broaden horizons for human beings; and exchange and cooperation between different cultures are promoted for mutual benefit. Looking back over its 150-year history, we find that the International Expo and regional development are interdependent.