In order to meet the travel needs of passengers in the vicinity of Air China's major airports, the integrated Ground and Air products, arranged jointly by Air China and local ground transportation agencies, allows passengers to use a reservation system to search, book and purchase ground segments that connect with their air segments. The mentioned air segments are the flight segments operated by Air China; The ground segments include intercity airport bus segment, and rail transit segment operated by ground transportation companies. Passengers can go through the check-in procedures for flights, buses or trains only with relevant documentation, truly achieving one-ticket access and greatly improving the efficiencies of ticket purchase and travel for passengers.