China Eastern Airlines Corporation Limited is an airline headquartered in the China Eastern Airlines Building, on the grounds of Shanghai Hongqiao International Airport in Changning District, Shanghai, China. It is a major Chinese airline operating international, domestic and regional routes. Its main hubs are at Shanghai Pudong International Airport and Shanghai Hongqiao International Airport, with secondary hubs at Kunming Changshui International Airport and Xi'an Xianyang International Airport. China Eastern Airlines is China's second-largest carrier by passenger numbers. China Eastern and its subsidiary Shanghai Airlines became the 14th member of SkyTeam on 21 June 2011. In 2012, China Eastern Airlines carried 73.08 million domestic and international passengers with an average load factor of 73%.