A worker maintains the C919, China's first domestically-built large passenger jet, in Shanghai, east China, April 20, 2017. The maiden flight of the C919 is scheduled for May 5, the Commercial Aircraft Corporation of China (COMAC) said Wednesday. The maiden flight will take place in the Shanghai Pudong International Airport. "If weather conditions do not allow it, the maiden flight will be rescheduled," the company said. (Xinhua/Ding Ting)