What are the four evils in Yunnan?

The elimination of four pests in Yunnan refers to the elimination of mice, mosquitoes, flies and cockroaches. These four pests are considered to be common pests in urban management and residents' life, posing a potential threat to human health and environmental sanitation. Therefore, it is of great significance to eliminate or reduce the impact of these pests on human living environment by killing the four pests. Killing the four pests should follow the principles of safety, effectiveness and environmental protection, use environmentally-friendly and efficient products and methods, and pay attention to personal and public health safety. If necessary, it is recommended to find a professional pest control company for disinfection.