How to wear face mask? Do you really understand?

"If you are healthy, when you wear a mask, put the green side facing out; if you're sick, but the white side out," an article on how to right wear masks method has been widely spread by microblogs, netizens have said "long knowledge of". Reporter online has searched and found that microblog is reproduced in several well-known websites and hospitals, many users believe that.

One of the netizens said, long ago, Xiangyang consecutive fog and haze, to wear a mask of the time coming again, this was a timely reminder. Also, have friends on the microblog questioned the authenticity: some disposable masks are white, how to explain?
Reporters visited the downtown area Tianji and Sanjiu and other large pharmacy discovery, pharmacy mask was placed in a prominent position, and some anti PM2.5 masks were marked with the words and so on. Wearing masks can be divided into front and back? Sales staff said, never heard of such a statement, has been wearing the white surface inside. 
In this regard, the professionals said, masks be divided into front and back points of view there is no basis, there will be instructions on the mask is generally purchased, in accordance with the front and back directions can be worn. He suggested that, in the absence of an infectious disease epidemic period, healthy people do not need to wear a mask. For patients who wear masks, choosing a disposable face mask is the best. If you want to prevent dust, bacteria, and viruses, we recommend selecting medical masks with 8-12 layers. 
Also, do not re-use disposable respirators, usually, 6-8 hours would need a replacement. If you do not wear a mask temporarily, put it in the bag, so as not to glue dust. 
Usually, we buy in pharmacies disposable masks are common for medical-surgical masks, it has two sides, the darker side - blue facing outward, toward the lighter side, the close to our face. Moreover, masks also point up and down, there are metal strips that feel stiff on is upper side when wearing close to the bridge of the nose (as above shown). 
Learn the basic structure of the mask, and we learn about how to properly wear a mask. 

1. the wash: first, wash your hands, avoid unclean hands pollution masks an inner surface;   

2. the hang: the horizontal mask attached to the face and nose, both ends of the rope hanging on the ear with two hands; 

3. the pull: like under shown, both hands in the vertical direction to pull the mask folds so that the mask can fully cover the nose and mouth, and chin;  

4. the pressure: finally, use the index finger on both hands on either side of the nose pressed metal strip, so that the upper-end face masks can be close to the bridge of the nose.  
In addition, the need to draw attention to is: wear a mask to avoid frequent touching a mask to prevent reduce the protective effect; after taking off the mask, put tape or paper wrapped inside, and then placed in covered trash disposal, and wash hands promptly; do not reuse disposable masks.