This is a 52-square-meter building with a pitched roof, located at the foot of the mountain, overlooking the mountains and fields in the distance. The main body is dominated by light gray and white, clarified with warm wood tones. The interior materials are kept pure. Bringing the concept of a tree indoors, the stair railing is as stable as a tree root. Design from mezzanine spaces to under stairs. The design of the handrails on each floor solves the problem of insufficient width of the original stairs. And integrate HomeKit to realize smart home, making the use of space more friendly.