Can Yang Sha go to physical education class?

Hello, if you go to physical education class indoors, you can. If you are outdoors, you'd better not go to physical education class.

Sand blowing is a kind of weather phenomenon, which is caused by the violent activities of large air currents that bring up dust on the surface of specific areas.

When the sand is blown, the visibility drops obviously, and the sky turns cloudy and yellow, which affects the visibility between 1km- 10km, mostly in April and May every year, mainly distributed in the western and northern regions of China, especially in Inner Mongolia, Tibet and Xinjiang.