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%. China Eastern Airlines was established on 25 June 1988 under the CAAC Huadong Administration. In 1997, China Eastern took over unprofitable China General Aviation and also became the country's first airline to offer shares on the international market. In 1998 it founded China Cargo Airlines in a joint venture with COSCO. In March 2001, it completed the takeover of Great Wall Airlines.[4] China Yunnan Airlines and China Northwest Airlines merged into China Eastern Airlines in 2003. The Chinese government has a majority ownership stake in China Eastern Airlines (61.64%), while some shares are publicly held (H shares, 32.19%); A shares, 6.17%. On 20 April 2006 the media broke the news of a possible sale of up to 20% of its stake to foreign investors, including Singapore Airlines, Emirates and Japan Airlines, with Singapore Airlines confirming that negotiations were underway.