With a high-speed direct-current motor, I shape laser beams into a light tube to imply that the space is full of pipes and cables. I also use semi-reflecting mirrors to simulate the flood of pipes and cables in a city. These pipes and cables are visible but untouchable. He arranges them and the prerecorded radio jamming in a pair, and thereby provides the audience with an extraordinary experience. In sum, this work deals with the direct relation of the pipes and cables to the residents in a city.