Chinanews.com client, May 1 (Lang Lang) Beijing opened in high temperature in May, and a pollution process followed. Real-time monitoring by the Beijing Environmental Protection Monitoring Center shows that recently, Beijing and surrounding areas have been affected by strong winds and dry air masses. The weather situation has been short-term oscillating and abrupt, and the pollution and diffusion conditions have obviously become unfavorable. The PM2.5 concentration in the region is 4-5, with moderate-to-severe pollution levels. Among them, the urban area is heavily polluted, the northern area is lighter, and the eastern area transmission and high temperature secondary conversion are the main causes of this pollution process. The latest forecast data shows that the pollution diffusion situation from May 1 to 2 continues to be relatively unfavorable and the temperature is relatively high. It is expected that the overall air quality will be higher than Grade 4 and the PM2.5 concentration will remain at a relatively high level.