炮台山
Originally, according to the document "Rail Projects Under Planning 2000" released by the Highways Department, the current Tung Chung line would be extended from Hong Kong terminus eastward and two new stations, Tamar station and Exhibition Centre station are proposed on the extension. The new route would then connect and continue on the Island line from Fortress Hill station to Chai Wan terminus. The Tseung Kwan O line will have newly constructed tunnels connected from its North Point terminus to Fortress Hill station and continue on the remaining western half of the Island line.