This is a project inspired by Chinese traditional superstition about door threshold — you have to avoid touching the door threshold while entering or exiting to get good luck in Feng Shui. Because touching the door threshold means bad omen, in old days people would very carefully lift their feet up and step over the door threshold. For this project, I recreated a situation where this traditional superstition was reenacted. The installation is composed by two components, one is the ring like structure which referenced panopticon and the other one is a device placed in the center of the ring and emitting laser light. The participants are only allowed to move within the panopticon in one direction, and while the participant is slowly walking, the laser-emitting device would rotate as well. When participant is walking inside the panopticon, they have to avoid touching the invisible line created by the laser emitting device, so they would have to lift their leg and step over just like what people did with door threshold. Through this installation and performance, I intend to discuss the invisible disciplines and invisible power structure in our culture and society through a reenacting of traditional superstition.