The building of the air traffic hub combined with the regional comparative advantage can significantly trigger economic growth. Chengdu is situated at the western doorways for the "Belt and Road initiative". With the opportunity brought by the second airport construction, Chengdu will strongly prompt the building of air traffic hub. making Chengdu today to become a Greater Chengdu in the future. Anbound consultant believes that the Greater Chengdu will become the third largest city in China after Beijing and Shanghai.