This is a new try of PIY,  460 tenon parts and 70 pieces of furniture are placed in a 15 square meter old Hutong house to create a practical living room and study space. Environmentally friendly materials and rich colors bring different visual feelings to the traditional Hutong.  In order to meet with the storage requirements of small spaces, we deliberately design a "Tetris" storage wall with full of childhood memories, and also it is responded to the theme of "symbiosis" in the exhibition.