On this day, 41 years ago, on January 24, 1984 (December 22, 1983, the lunar calendar), China successfully developed its first medium-and short-range passenger aircraft. The Yun-7 aircraft, the first medium and short-range passenger aircraft successfully developed by China, was officially delivered to the civil aviation department for use. The Yun-7 aircraft is produced by Xi'an Aircraft Manufacturing Company. It can carry 48 passengers, reaches a speed of 460 kilometers per hour, and has a maximum range of 1900 kilometers.