A worker inspects the operation of 3D printers at the additive manufacturing research and application center of Hunan Vanguard Group Co., Ltd. in the economic development zone of Changsha City, central China's Hunan Province, Feb. 11, 2020. The company has been producing goggles for medical use with more than 50 3D printers working day and night recently. The first batch of 500 pairs of goggles it produced have been sent to Changsha and Huaihua to aid the novel coronavirus control efforts there. (Xinhua/Xue Yuge)
