The 919 large passenger aircraft, called COMAC C919, is China's first mainline civilian aircraft with independent intellectual property rights in accordance with the latest international airworthiness standards and began development in 2008. C is the initial letter of China and the initial letter of COMAC, the abbreviation of China Business Flight. The meaning of the first "9" is that it will last forever. "19" represents the maximum passenger capacity of China's first medium-sized passenger aircraft is 190 seats. The C919 passenger aircraft is a large-scale civil jet developed by China in accordance with international civil aviation regulations and has independent intellectual property rights. It has 158-168 seats and a range of 4075-5555 kilometers. It successfully made its first flight on May 5, 2017. As of February 26, 2018, It has accumulated 815 orders from 28 customers. On February 6, 2018, China Commercial Aircraft Co., Ltd. announced the delivery of the first C919 single-aisle passenger aircraft in 2021.