In a word, the house! Two words, dead house! Go to hell! Really, try not to go out! If you have to move from one place to another, stay in the new place. For example, go to the company from home in the morning, and then stay in the company from noon to evening afternoon. If possible, the company allows you to sleep directly in the company with a bedding toothbrush.

Go home from work and don't wander around. Being outdoors for a long time means absorbing more smog. When you feel bored, ask yourself, is it important to play or to live?

Some people may say that indoor air is worse than outdoor air in foggy days because there is no air purifier. Save the money for shopping and buy a purifier. One is not enough for two people and two is not enough for three people. After all, there is no air that the purifier can't solve, right (the purifier on a treasure is so advertised).

It is necessary to wear a mask when going out. What if I forget to bring it? Quickly take out your mobile phone and search the encyclopedia of life to see how to quickly make a mask with paper towels. This skill must be acquired in order to save lives.