Tianjin

More than 400 flights out of Beijing's two main airports were cancelled amid high winds and low visibility. The National Meteorological Center said Monday's storm had developed in the Gobi Desert in the Inner Mongolia Region.

With its mix of desert and grassy steppe, Inner Mongolia is particularly prone to extreme weather resulting from resource exploitation.

The National Meteorological Center forecasted the sand and dust would affect 12 provinces and regions from Xinjiang in the far northwest to Heilongjiang in the northeast and Tianjin's eastern coastal port city.

Chinese authorities have ordered mass testing of millions of people in three different cities across the country after multiple locally transmitted Covid-19 cases were discovered. New waves of infections are currently happening in Tianjin, Shanghai and Manzhouli.