106 model aircraft, one prototype of China's home developed large passenger C919 jetliner, completes its first flight in Shanghai on December 27, 2019, according to the Commercial Aircraft Corporation of China (COMAC). (Photo: China News Service/ Wang Jiliang)

106 model aircraft, one prototype of China's home developed large passenger C919 jetliner, completes its first flight in Shanghai on December 27, 2019, according to the Commercial Aircraft Corporation of China (COMAC). (Photo: China News Service/ Wang Jiliang)

106 model aircraft, one prototype of China's home developed large passenger C919 jetliner, completes its first flight in Shanghai on December 27, 2019, according to the Commercial Aircraft Corporation of China (COMAC).(Photo: China News Service/ Wang Jiliang)