Combo photo shows the view of the Central Business District (CBD) in Beijing, capital of China, Sept. 8, 2020 (up) and the CBD shrouded in dust on March 15, 2021. Beijing was enveloped in yellow dust on Monday morning with visibility at less than 1 km, as the city's meteorological department issued a yellow warning for sandstorms, the third-most hazardous level. (Photo by Yan Cangna/Xinhua)
