China News Service, May 4th Central Meteorological Observatory issued a yellow fog warning at 18:00 on May 4th. Some areas in northwestern Fujian and other places have heavy fog. Among them, central Hebei and southern Zhejiang have dense fog with a visibility of less than 500 meters.
In addition, there will be foggy weather with a visibility of less than 1 km in the north-central and southwestern seas of the East China Sea, Zhejiang and northern coastal areas of Fujian.