Construction workers get along with the interior decoration inside the west exhibition hall of the Theme Pavilion for the Shanghai 2010 World Expo, in Shanghai, east China, April 26, 2009. The west exhibition hall of the Theme Pavilion for the Shanghai 2010 World Expo, extending to 180 meters from north to south and 126 meters from east to west, is noted for a distinguished architectural structure free of pillars, the largest of its kind in China.