the school playground. By inquiring about the information of open-air stalls in Hubei University of Technology, it is known that in order to increase the sales of open-air stalls, the open-air stalls in Hubei University of Technology are located in the school playground. Hubei University of Technology, referred to as "Hugong University" for short, is located in Wuhan, Hubei Province. It is a multi-disciplinary university featuring engineering, covering eight disciplines including engineering, literature, science, art, economics, management, law and education.