On May 8, 1920, the Beijing-Tianjin section of the Beijing-Shanghai route was put into operation. 1903 On May 8th, American cyclist Brother Wright successfully drove the "Flyer", and human beings realized the illusion of flying freely. 19 10, the Qing government bought a Farman biplane from France and opened an airport in the Yijun amusement park in Nanyuan, which was the first airplane and airport owned by China. After the Revolution of 1911, Yuan Shikai, who stole the presidency, took the advice of French consultants and founded the first regular aviation school in China in 19 13, and spent 300,000 silver dollars to buy 10 a French "Gaudelong" biplane trainer. The school closed after the second direct professional war. However, it trained more than 100 pilots in the first four periods, which played an important role in the aviation history of China, and some of them later became the backbone of civil aviation flight. The earliest route of China civil aviation is the Beijing-Tianjin section of the "Beijing-Shanghai route" prepared by the Aviation Department of the Ministry of Communications of Beiyang Government. On may 8 of the same year, it officially set sail. 1 921July1day, Beijing-Jinan section was added, and air mail was also opened. To this end, the Beiyang government also issued the first set of airmail stamps in China (***5).