The project is a renovation of an old house. The designer aimed to improve the condition of the 40-year-old house. Due to the long and narrow layout, the emphasis is on natural lighting and ventilation, and the staircase and route planning is crucial. In this way, the sunlight can fall evenly on each floor, brightening and amplifying the visual effect of the light-colored space. The project is a renovation of an old house. The designer aimed to improve the condition of the 40-year-old house. Due to the long and narrow layout, the emphasis is on natural lighting and ventilation, and the staircase and route planning is crucial. In this way, the sunlight can fall evenly on each floor, brightening and amplifying the visual effect of the light-colored space.