Introduction to the Expo Axis: The Expo Axis is the main entrance and main axis of the 2010 Shanghai World Expo in China. It is one of the five permanent buildings of the Expo with one axis and four pavilions. It is a large commercial complex integrating commerce, catering, entertainment, exhibitions and other services. , transportation complex. The Expo Axis is about 1,000 meters long and 110 meters wide, with two floors underground and above ground. It is a semi-open building and is the largest single project in the Expo site. Because it is located in the center of the Pudong World Expo Park and connects the China National Pavilion, the World Expo Theme Pavilion, the World Expo Center and the World Expo Cultural Center on the left and right respectively, these five buildings are called "four pavilions on one axis".