Technicians transport melt-blown fabrics, a key material in making masks, at a plant in Fangshan District of Beijing, capital of China, March 7, 2020. With a designed annual production capacity of 14,400 tons, the melt-blown fabrics production line of Yanshan petrochemical company in Beijing, was built to boost the production of masks amid the fight against the novel coronavirus. (Xinhua/Zhang Yuwei)
