As the only civil airline flying the national flag in China, Air China plays an important role in the air transport industry in China. As the holding company of China Airlines Group, Air China undertakes the main business of air transportation. Air China, China Eastern Airlines and China Southern Airlines are also called the three major airlines in China, serving the domestic and international aviation markets in China. Air China has made some achievements in the past few years. According to the data of its annual report, in 20 15 years, Air China achieved operating income of 108929 million yuan, up by 3.85% year-on-year; The net profit attributable to shareholders of listed companies was 6.774 billion yuan, a year-on-year increase of 77.45%. This shows that Air China has achieved certain growth in its operation and its profitability has improved.