China Airlines is developing very rapidly. At present, there are a total of 24 aviation groups or companies that have independent flight operation codes, including 16 state-owned holding companies, 6 listed companies, 5 Sino (Hong Kong)-foreign joint venture companies and 7 private companies. In 2005, China mainland, excluding Hong Kong and Macao, boasts 7 airlines which are ranked in the world’s top 100 volume of passenger transportation, and China Southern Airlines as well as Air China are ranked in the world’s top 20.