What should you do if you encounter a severe sandstorm in Beijing?

The largest sandstorm in Beijing’s history occurred in March 2002. The concentration of that sandstorm was as high as 10,000 micrograms/m, and the concentrations of Ca, Mg, Al, Fe, Na, and Ti all reached normal levels. 30-58 times, and the duration is much longer than the one just past. I was still in school at that time. When I woke up in the morning, the sky was not getting brighter, but getting darker. The sky was filled with dark yellow. One after another, everyone turned on the fluorescent lights in the room, one dormitory after another. Looking out every window, there was a glow. With a faint blue color. The sky is getting darker and darker, and you can smell the earth while sitting in the house. Even though the doors and windows are closed, you can even feel the earth getting in from any gap and falling on the table and the floor. A feeling that the end is near. This situation lasted until the evening and got better. As for the trees and cars outside, needless to say, none of them had their true colors. I was extremely impressed by the faint blue color. It was as if an alien spacecraft had come to the earth, but the whole thing was hidden. Only the portholes were exposed to you. It was also like being in a strange world. You looked around blankly, but only I can see some writhing blue lights that I don’t know the distance from. So much so that I now feel that any film about sandstorms that does not produce that faint blue color means that the director has not personally experienced sandstorms.

The most severe sandstorms in my memory are not in recent years. When I was in high school, one day coincided with evening self-study, and I accidentally looked out the window. Early spring, evening, yellow sand. The classroom is lit by white lights, which makes the outside even more desolate and silent. A good friend of mine sent me a note. She said you look at the beautiful colors outside. At that time, I was romantic, and I felt that the lonely smoke in the desert in martial arts books was probably like this. If I didn't have to ride my bike home from school, I'd be intoxicated. So my expression was very distorted at that time. After returning home, my expression became miserable. When I was in college, I really looked forward to sandstorms, because when there were sandstorms in the imperial capital, the sky was like a shit basin, and the day was like night. The evil Beihang dormitory had to have power supply all day long so that I could play games. Girls usually go to class in the wind and sand. After returning to the dormitory, they can build a sandcastle after shaking off.