The new building is a youth hostel. The first floor is for public space and the second floor guest rooms. The design retains the exterior appearance of the original building, which is consistent with the surrounding local traditional houses, while the interior has been transformed boldly. On the first floor, the original wooden partition boards are demolished to combine three independent spaces into a large one. Here is the coffee and leisure bar, serving both the residents of youth hostel and the local villagers. The second floor maintains the permeability of the original space, adding “houses in the house” as a residential unit. The three houses in the house are constructed by wood frames and sunlight boards, light, transparent, removable and reusable, which form a dialogue with the old rammed earth walls and log structure. Installed with wheels, the three houses can be moved in the building, forming interaction and gameplay between the building and the people, and making the space variable. The lighting also enhances the dramatics of the space, and the atmosphere of the space can be changed through the conversion between the warm white light in the ordinary mode and the color light in the party mode. The design of toilet and bathroom continues the material and atmosphere of the main space. Ambiguity and dramatics endow the old building with a different new expression.