How to express flying in words?

The flight number of domestic routes consists of two English letters and four Arabic numerals. Two of the English letters are abbreviations for airlines. For example, CA stands for China International Airlines, CZ stands for China Southern Airlines, MU stands for China Eastern Airlines, 3U stands for Sichuan Airlines, FM stands for Shanghai Airlines, HU stands for Hainan Airlines, MF stands for Xiamen Airlines, Shenzhen Airlines and SC stands for Shandong Airlines. Four Arabic numerals, the first digit 1 is the code of the regional administration where the plane takes off, such as Beijing Bureau 1, and the second digit is the code of the regional administration where the plane will fly, such as Zhongnan (Guangzhou) Bureau 3. The other administrations are Xi 'an Bureau 2, Chengdu Bureau 4 and Shanghai Bureau (China Eastern Airlines) 5. The third and fourth digits indicate the frequency, that is, the specific number of the flight. If the fourth digit is odd, it means that the flight is an outbound flight, and if it is even, it is a return flight. For example, CA 120 1 represents the outbound flight from Beijing to Xi 'an undertaken by China International Airlines. MU5302 refers to the return flight from Shanghai to Guangzhou undertaken by China Eastern Airlines. View original post >>