BEIJING - JULY 19: Passengers wait to board the new Airport Express train at the station in Beijing Capital International Airport on July 19, 2008 in Beijing, China. After seven years of construction, three new subway lines will be put in to service for Olympic Games this Saturday in Beijing. The Airport Express Line, with four stations, is 28 kilometers long. The 20-minute ride will be a boon for passengers flying in and out of Beijing's Capital Airport.