The case used as a regional luxury apartments is located in the downtown of Hsinchu City. Three sides of the nature light is the most valuable advantage of this case. Due to the building configuration is designed like butterfly wings, the Interior layout is not foursquare and the public area and the private area present a 45 degree angle of intersection. The designer connects the living room, dining room and kitchen to create a wide and bright fan-shaped space. The sector terrace which is near to the living room window also enriches the landscape effect in public areas.