WCIEC (Western China International Expo Center) has an area of 300,000 sq.m divided into 16 halls in eight pavilions, including 15 standard exhibition halls and one multi-function hall. Each pavilion is connected by passages inside except the external transportation hall. WCIEC adopted steel shuttle-shaped truss columns structure which widens the unblocked view with the no-column design the interior. Meanwhile the conception maximizes the usage efficiency of the pavilions which to lower the amount of steel used in construction. DassoELEMENTS is applied to the project, aiming to add a natural feel as well as warmth to the steel world.