1. The development of large passenger aircraft holds great strategic significance
The term"large passenger aircraft"refers to transport airplanes with more than 150 seats or over 100 t takeoff weight (also known as trunk liners). Among these, commercial airliners with 150–200 seats meet the aviation market's requirements for short-haul routes and relatively low passenger capacity. As a result, large pas-senger aircraft are prevalent within airlines and are competitive in the aviation market. This kind of aircraft is also the entry level and basic type for the development of trunk liners.