Projects: Trung Yen Plaza, Hanoi Building investor: UDIC Architecture: Architype company; Design year: 2008 Total land area: 19,279m2; Construction ratio: 49% To optimize daylight and ventilation,three blocks of the building are located in three different directions and in Y-shape. This design is totally different from other existing buildings which normally has the shape of U or O. Therefore, the landscape and yard surrounds each block as shown in the picture. The investor applied several passive solutions for energy efficiency, especially the building envelope and building form design. The building does not face to the East and West to avoid direct sunshine.