[central Meteorological Observatory: strong cold air will affect most parts of China] April 20, the Central Meteorological Observatory predicts that today and tomorrow, temperatures in central and eastern Inner Mongolia, eastern northwest, North China, central Northeast, western Huang-Huai, southern Jianghan, Jianghan, and northwestern Jiangnan will successively drop by 610 ℃. The cooling range in eastern Jilin, eastern Gansu, Shaanxi, Shanxi, southwest Hebei, western Henan and northwest Hubei can reach more than 12 ℃.