以半叶肺为基本原型，用口罩来代替肺的轮廓，提醒大家，复工在即，各处人流量会突然增大，戴好口罩是对自己的他人负责。 Take the half leaf lung as the basic prototype, use the mask to replace the contour of the lung, and remind everyone that the flow of people everywhere will suddenly increase at the moment of resumption of work. Wearing a good mask is responsible for others.