Boeing 737-800 is a kind of twin-engine turbofan short-range narrow-range passenger aircraft designed and produced by Boeing, which belongs to the Boeing 737NG series, which is the fuselage length of Boeing 737-700 to replace Boeing 737-400 and fill the market gap after the retirement of MD-80 and MD-90.The aircraft officially launched the project on September 5, 1994 and successfully made its maiden flight on July 31, 1997. The cockpit features a new large display to improve the convenience and efficiency of flight operations. The Boeing 737-800 has an advanced wing design, with the option of retrofitting winglets to increase fuel capacity and improve flight efficiency, resulting in a longer range.The Boeing 737-800 has a fuselage length of 39.5 meters, a wingspan (with winglets) of 35.79 meters, and a cabin width of 3.53 meters. In a typical two-cabin layout, it can carry 162 passengers; In the all-economy class layout, the passenger capacity can reach 189 people. It has a maximum take-off weight of 79,010 kg, a maximum range of up to 5,665 km, and a cruising speed of about Mach 0.785 (848 km/h).The Boeing 737-800 has been widely welcomed and used worldwide due to its reliable performance, economical operating costs and comfortable riding experience, and has become an important member of the fleets of many airlines.