Workers make protective suits at a workshop in Luyang District of Hefei, capital of east China's Anhui Province, April 6, 2020. Companies of medical protective equipment in Luyang District of Hefei have kicked into high gear recently to ensure medical supplies. (Xinhua/Zhou Mu)

Workers make face masks at a workshop in Luyang District of Hefei, capital of east China's Anhui Province, April 6, 2020. Companies of medical protective equipment in Luyang District of Hefei have kicked into high gear recently to ensure medical supplies. (Xinhua/Zhou Mu)

A worker makes face masks at a workshop in Luyang District of Hefei, capital of east China's Anhui Province, April 6, 2020. Companies of medical protective equipment in Luyang District of Hefei have kicked into high gear recently to ensure medical supplies. (Xinhua/Zhou Mu)

A worker makes protective suits at a workshop in Luyang District of Hefei, capital of east China's Anhui Province, April 6, 2020. Companies of medical protective equipment in Luyang District of Hefei have kicked into high gear recently to ensure medical supplies. (Xinhua/Zhou Mu)

Workers make face masks at a workshop in Luyang District of Hefei, capital of east China's Anhui Province, April 6, 2020. Companies of medical protective equipment in Luyang District of Hefei have kicked into high gear recently to ensure medical supplies. (Xinhua/Zhou Mu)

A worker makes protective suits at a workshop in Luyang District of Hefei, capital of east China's Anhui Province, April 6, 2020. Companies of medical protective equipment in Luyang District of Hefei have kicked into high gear recently to ensure medical supplies. (Xinhua/Zhou Mu)