1. A space (L:9m*W:3m*H:6m; also referred to as "embedded block"), built from the east side, is renovated as the new entrance and the spiral staircase leading to the second floor. This renovation turns the space into the hub of circulation and makes the indoor space more spacious and flexible. 2. A 6-meter wall decorated with assorted plants is arranged by the side of the new entrance. The spiral staircase and the plant wall form the focal point of the entrance which is made by merging two stories of the original building. The lower part of the wall of the back yard is designed as a "white space" so that the focal point is extended to the back yard. The height of the wall was increased so that the space is made more private and detached from the neighboring building. Such a design creates the sensibility of a residence being surrounded by greenery.