The NBBJ designed Tencent Global Headquarters in Shenzhen is an twin tower, urban high rise, reflecting the company’s rising international influence, networked culture and the interconnectivity of the web. Reducing the energy consumption and carbon emissions of 270,000 square metres of office space was another key goal of the design. Self-shading glazed facades helps prevent the towers from too much solar gain, reducing the need for air conditioning. Glass panels lean out on the south facing sides or tilt back and forth on the eastern and western faces, with their edges shaded by aluminium.