Pudong International Airport's new satellite terminal, the world's largest, will open to the public on September 16, the airport's 20th anniversary. It will expand the capacity of the one of the world’s busiest airports, while improving the flight on-time rate and streamlining transfer procedures. The core project of the third-phase of the airport's expansion, which began in December 2015, the H-shaped terminal building, known as S1 and S2, covers 620,000 square meters and is about 700 meters from terminals 1 and 2.