The project is located at No. 24 Xigang Street, Dongguan Street, Dalian City, China. It was built in the 1920s and is a historically protected building that has witnessed the changes of Dalian over the past century. We repair and update the original building without damaging its appearance, structure, or displaying historical imprints on the walls, balancing the relationship between "new" and "old", and maximizing the preservation of historical relics. Repair and preserve the wooden beam structure of the outer corridor, protectively restore the old brick wall, and use the doorway as the boundary room for visitors. The first floor of the historical museum space is dark and immersive, while the second floor of the mansion is warm and friendly for visitors. Passing through the doorway, the view suddenly becomes clear, creating a rich visual experience and reproducing the former charm of Dongguan Street.