What do you mean by pm2.5: 125 and pointer chart on China Weather Network?

China Meteorological Bureau has introduced PM2.5 into meteorological early warning. PM2.5 refers to particles with a diameter less than or equal to 2.5 microns in the atmosphere, also known as particles entering the lungs. Related research shows that almost 50% of inhaled PM 2.5 is deposited in the lungs. With the increase of PM2.5 concentration, people's risk of respiratory and cardiovascular diseases will increase accordingly. Therefore, we should not take the smog weather lightly. We should protect ourselves and our families before the air improves. Let Park Wai-shin, who is aiming at the sky, help you. Professional protective mask imported from the United States, which can prevent smog and germs.