The main structure of the China Pavilion, "The Crown of the East," has a distinctive roof, made of traditional dougong or brackets, which date back more than 2,000 years. The dougong style features wooden brackets fixed layer upon layer between the top of a column and a crossbeam. This unique structural component of interlocking wooden brackets is one of the most important elements in traditional Chinese architecture. Dougong was widely used in the Spring and Autumn Period (770 BC-467 BC).

（Source: Shanghai 2010 Expo Official Website）