As one of China's three largest state-owned carriers, China Southern flies to more than 200 destinations and 40 countries. The airline operates a hub-and-spoke system, where it gathers and distributes passengers through key airports in Guangzhou. The carrier generates less than 10% of revenue from premium class tickets, the lowest percentage among the Big Three. As a result of rising competition on the international front, China Southern currently derives the majority of its profits from its domestic service.