Zheng Qun is from Qingdao, Shandong. Associate professor of Northwest University, tutor of master students. Member of China Society of World Medieval History. Teacher Zheng Qun is giving lectures on the Internet. In the lecture, Mr. Zheng Qun gave lectures from four aspects: the composition of safety supervision and the situation of safety production in China, how to do a good job in safety production in towns (streets), how to exempt safety production supervision, and the analysis of typical cases of production safety accidents. Combined with the actual situation at the grass-roots level, she gave a profound explanation on the knowledge of safety production.