Air China Limited is engaged in the provision of airline, airline-related services, including aircraft engineering services, air catering services and airport ground handling services, mainly in Mainland China, Hong Kong and Macau. Its segments include airline operations segment, which comprises the provision of air passenger and air cargo services, and the other operations segment, which comprises the provision of aircraft engineering, ground services and other airline-related services. As of December 31, 2010, through the Star Alliance, the routes network of the Company covers 1,160 destinations in 181 countries. The Comapny directly or indirectly holds interests in the airlines, such as Air China Cargo Co., Ltd., Air Macau Company Limited, Shenzhen Airlines Company Limited, Cathay Pacific Airways Limited and Shandong Airlines Co., Ltd. As of December 31, 2010, it operated a fleet of 272 aircraft in total, including 268 passenger aircraft and four business jets.