According to the message from China Weather Network, after a strong sandstorm raged in Inner Mongolia on the 19th, the influence scope of the dusty weather continued to expand eastward. From the 19th to 20th, 15 provinces and regions including Xinjiang, Qinghai, Gansu, Ningxia, Beijing-Tianjin area, Hebei, Shanxi, Shaanxi, Henan, Shandong, Jiangsu, Anhui, Hubei, Sichuan were affected by dusty weather. According to an expert from the Central Meteorological Observatory, this dusty weather process had the widest range and strongest intensity since January 2009, and its influence was more to the south. The affected areas are exactly the densely populated provinces with relatively developed economy.