This residential building is connected by two-way stairs between the floors. The two floors are connected to each other by scissors. They seem to be domineering and are rated by the netizens as the most prestigious building in history. The building was built in the 1980s. Because the two buildings are connected by the same staircase, everyone is used to calling these two buildings "the tower". Such a stair structure is known in the industry as a "scissor ladder" and is characterized by a cross-type scissors ladder and a rest platform, and the rest platform is located between two adjacent floors leading to the upper and lower floors. The scissors ladder is connected to the rest platform, and the steering staircase is folded inward relative to the scissors ladder. And each layer brings you different surprises, some old things become the decorations of the door and the corridor, very nostalgic.