China Unicom's engineer Long Jiaxin adjusts a 5G signal converter at the command center of a temporary hospital in Guanggu area of Wuhan, central China's Hubei Province, March 3, 2020. China Unicom is making full use of its "5G+Cloud+Network" information and communication technology advantages to help Wuhan in its fight against the novel coronavirus. (Xinhua/Xiao Yijiu)