The hallway is on the second floor of the Longbin Building in Shanghai Jiao Tong University. The scenario mainly consists of two perpendicular corridors, connected by a corner. The long corridor is 2.97 m wide and 32.53 m long, including two 3 m long extensions at both ends. Indented offices are distributed along the corridor, whose depth is about 0.6 m with doors closed. The other corridor is 7 m wide which extends all the way to the left end.