With China's great success in controlling the virus, people around the world began to follow the example of Chinese people wearing masks to prevent the spread of the virus. Everyone was buying masks, especially kn95 masks. At present, kn95 respirators are in short supply all over the world, because the efficiency and efficacy of kn95 respirators in China and N95 respirators in the United States and FFP2 / ffp3 respirators in Europe are exactly the same, because they are outstanding in personal protection in China. It's time to buy China's standard kn95 masks. Don't be fooled by politicians who are not doctors. They try to reduce public concerns about stabilizing the stock market. Protect yourself and your family.