This project is designer designed for a family with twins for Beijing TV Renovation Program. Beijing Dongbeiyuan Hutong where Twins’house is located in is meandering through the Liulichang Ancient Culture Street, adjacent to the landmark buildings like the Great Hall of the People, the National Theater, Dashilan and other core scenic spots. Just as most of Hutong life in Beijing is falling into decay, Twins’house is in desperate need of a better family experience and a taste for life. The “Twins’ House” originally was the main house in the Courtyard, five-roomed, with an area of 80 square meters. It covers the function needed for the family of five to live, work, study and entertain. In the seemingly ample space, playroom with runways for the twin sisters, independent bathrooms, small studio, cloakroom, indoor yard and balcony are supposed to be designed to satisfy the family’s needs. Therefore, how to improve basic functions, and demand for organizing and reconciling the traces of space users become highlighted. The originally added simple colonnade is transformed into a hidden framing glass curtain wall, and the kitchen and dining room refitted into skylights. In the sunshine, under the stars, the family have meals sharing everyday together. Facing the corridor stood the glass curtain wall clad in grey rough bricks, a warmth even at night has become clear and sweet. The installation of an openable fan onto the curtain wall makes a ventilative improvement in the living room.