KSP Jurgen Engel Architekten International has won the international competition entitled 'Blue Sky Building Project' for the Air China headquarters in the major west Chinese city Chengdu. With its design for the high-rise, the international team from Frankfurt/Main and Beijing saw off five other entries. The office boasts a gross surface area (GSA) of 124,000 sq m and offers space for a total of 5,470 workspaces. The fact that the high-rise design should serve as a role model with regard to energy efficiency and sustainability is of major concern to the developer.