According to Beijing Meteorological Bureau’s official microblog @Meteorological Beijing News, the results of pollen concentration monitoring in Beijing on August 25 showed that the average pollen concentration was 110 grains per 1,000 square millimeters, which was on the high side. It is estimated that the number of pollen grains in urban area is 150-200 grains per 1,000 square millimeter on August 27, which is at a relatively high level. Pollen concentration in autumn has stabilized at a relatively high level recently. Pollen sensitization in autumn is strong. Tomorrow is a sunny and breezy weather, which is conducive to the increase of pollen concentration. People with allergies should wear masks when they go out and stay away from areas with dense flowers and plants.