Mirror glass is used on the ground and walls of the yard. The unique reflectivity of the material allows the surrounding hutongs, trees, and sky to be reflected on the ground of the yard, which brings more possibilities to space. This kind of interaction between virtual and reality is more prominent. People in the scene, people also in the mirror, in the layered reflection and transparent contrast, give people a sense of space experience like a dream. With the continuous changes of reflection and the surrounding environment, the mirrored courtyard shows a rapidly changing beauty, each moment is unique, just like time, cannot be recorded but can only be felt. The "invisible" state reflected by the "tangible" in the courtyard also makes the viewer and the environment, the environment and architecture, architecture, and people all have a kind of eye-to-eye relationship, which hides the boundary of the space. it also hides the sense of distance between people and space. The small courtyard is only about 12 planes, showing a long and narrow shape. the glass mirrors of the ground and walls enlarge the area of the courtyard visually. When the owner steps into the door, she will be surrounded by the perspective effect of specular reflection, which increases the permeability of the space and gives people double landscape experience.