Netizen submission: In order to prevent and control mosquito-borne infectious diseases such as chikungunya and dengue fever, Guangzhou has been conducting mosquito extermination and disinfection in areas such as residential building entrances and places where clothes are dried. Local residents questioned whether the practice of spraying multiple times a day is scientific and reasonable. Some people said: "I know they are killing mosquitoes, but otherwise I'd think they were spreading poison." RebelAcademy[反贼学院]