There is air conditioning. The reason why the classrooms of Yunnan University are equipped with air conditioning is mainly to improve the teaching environment, improve the learning and teaching efficiency of students and teachers, and also to adapt to the local climate characteristics. Yunnan is located in subtropical and tropical monsoon climate zone, with high temperature and humidity in summer and relatively cold in winter. Therefore, in order to ensure the health and comfort of students and teachers, it is necessary to install air-conditioning equipment in the classroom during the teaching process.