Complex sentence: Tuen Mun South is a proposed station in the vicinities of Tuen Mun Ferry Pier on the Tuen Mun South Extension, and as the future West Rail Line westbound terminus if built.
Split into simpler sentences: Tuen Mun South Extension is a proposed extension of the West Rail Line to the Tuen Mun South station in the vicinities of Tuen Mun Ferry Pier. This station will serve as the future West Rail Line westbound terminus if built.