Architecture, Building and Structure Design Fon 23 Office Building by Truedreams Construction CO., LTD Fon 23 is an office building planned as a human-oriented smart green workplace. Green design methods guide the project from the first plans to the selection of eco-friendly construction materials. Extensive planting covers the whole building, and green energy is combined with recyclable energy. A beehive-shaped multi-layer green wall links the exterior and the interior space. Terrace planting, water features and large French windows join indoor and outdoor areas and support natural ventilation and daylight. The building covers 5561.1 square meters.