Including China International Airlines, China Southern Airlines, China Eastern Airlines, Hainan Airlines, Shandong Airlines and Spring Airlines. Among them, China International Airlines is the only airline flying the national flag in China, providing international and domestic passenger and cargo transportation services and undertaking the task of national leaders' special plane. China Southern Airlines is one of the airlines with the largest number of domestic transport flights, the densest route network and the largest annual passenger traffic. China Eastern Airlines is the first airline in China to join the international aviation alliance, and it is also the three major airlines in China.