Workers make masks at a workshop of a medical material producing company in Jiaozuo City, central China's Henan Province, Feb. 9, 2020. Since the outbreak of the novel coronavirus, medical supplies manufacturing companies across China have been producing medical supplies at full capacity to power the fight against the epidemic. (Photo by Feng Xiaomin/Xinhua)

A worker makes masks at a workshop of a medical material producing company in Jiaozuo City, central China's Henan Province, Feb. 9, 2020. Since the outbreak of the novel coronavirus, medical supplies manufacturing companies across China have been producing medical supplies at full capacity to power the fight against the epidemic. (Photo by Feng Xiaomin/Xinhua)

Workers make masks at a medical technology company in Binzhou High-tech Industry Development Zone in Binzhou City, east China's Shandong Province, Feb. 8, 2020. Since the outbreak of the novel coronavirus, medical supplies manufacturing companies across China have been producing medical supplies at full capacity to power the fight against the epidemic. (Photo by Chu Baorui/Xinhua)

A worker makes masks at a workshop of a medical material producing company in Jiaozuo City, central China's Henan Province, Feb. 9, 2020. Since the outbreak of the novel coronavirus, medical supplies manufacturing companies across China have been producing medical supplies at full capacity to power the fight against the epidemic. (Photo by Feng Xiaomin/Xinhua)

Workers make masks at a workshop of a medical material producing company in Jiaozuo City, central China's Henan Province, Feb. 9, 2020. Since the outbreak of the novel coronavirus, medical supplies manufacturing companies across China have been producing medical supplies at full capacity to power the fight against the epidemic. (Photo by Feng Xiaomin/Xinhua)