As well as being the terminus for the high-speed cross-border rail service, the new station at West Kowloon will be served by the Airport Express and the MTR, via its planned Kowloon Southern Link. That would make West Kowloon the city's rail hub as well as its arts hub once the museums and performance venues planned for the area began opening after 2015, said Secretary for Transport and Housing Eva Cheng said. Indeed, the platforms of the new cross-border rail terminal will extend into the site of the West Kowloon Cultural District. However, Ms Cheng said that because they would be underground they would not be counted as part of the site's gross floor area. The amount of development on the arts-hub site will be strictly controlled. The authority to be set up to run the cultural district will control 3.3 hectares of the space above the station, on which offices or hotels up to 20 storeys high may be built. The Development Bureau will seek bids to build facilities, including a shopping mall, on the rest of the developable area above the terminal. 'We will develop the area into a new shopping centre,' Ms Cheng said.