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Four Pavilions along the Central Axis the major permanent buildings within the Expo Site. They refer　to the Expo Axis, China Pavilion, Theme Pavilions, Expo Center, and Expo Performance Center. The　Expo Axis is the main axis in Pudong Expo Site, leasing to the four pavilions through overhead　　and underground connections. The Expo Axis, the main traffic hinge in Pudong Site, also connects　with the Elevated Pedestrian’ Walk. This Axis will guide visitors to different pavilions in　Pudong Site.　　

“一轴四馆”是上海世博会世博园区内主要建筑物，将得到永久保留。“一轴四馆“所指的建筑是：世博轴、中国馆、主题馆、世博中心、世博演艺中心。世博轴是浦东世博园区的主轴线，从空中平台和地下联通上述四大世博重要建筑。世博轴还与高架步道连通，是园区内的交通枢纽，参观者进入浦东园区后可由此通达不同的场馆。