The C919 medium-sized passenger aircraft, full name COMAC C919, is China's first mainline civil aircraft with independent intellectual property rights in accordance with the latest international airworthiness standards, with 158-168 seats. It was developed by Commercial Aircraft Corporation of China in 2008 and successfully flew for the first time on May 5, 2017. C is the first letter of the Chinese English name "China" and the first letter of COMAC. The first "9" means that it will last forever. "19" represents the maximum passenger capacity of China's first medium-sized passenger aircraft. It is 190 seats. Finally, I hope that the domestic large aircraft will fly farther and farther!!!