Usage of surgical mask:
(1) the face of the mask is dark in color, and the face should face outwards. In addition, there is a metal nose clip on the mask.
(2) facing the face should be the opposite side of the surgical mask, that is, the lighter side. In addition, it should be noted that the part with the metal strip should be on the top of the mask, do not wear it upside down.
(3) after separating the front, back, upper and lower ends of the mask, wash your hands clean first, and hang the rope at both ends on your ears after determining whether the mask is correct.
(4) the last step, which is also the metal bar problem mentioned above, is to press the metal bar on both sides of the bridge of the nose with both hands after wearing the mask, so that the upper end of the mask is close to the bridge of the nose.