At the Kleenex Extraordinary Series of Face Mask Products Launching Ceremony held on July 24th, Zheng Chengzhong, the pediatrician of the No.306 Hospital of the Chinese People's Liberation Army, said that allergens such as harmful substances in the air and pollen are harmful to human health. During the outings, especially for haze and weather, allergies, susceptible seasons and high risk of adverse air pollution reactions - children, infants and young children, should wear suitable protective masks, adult version or adult version is not suitable for children to wear .