Complex sentence: As Prince Edward was primarily designed as a cross-platform interchange between the Kwun Tong and Tsuen Wan lines, although the Kwun Tong Line tracks had already been laid in 1979, the station was not used until the opening of the Tsuen Wan Line on 10 May 1982.
Split into simpler sentences: As Prince Edward was primarily designed as a cross-platform interchange between the Kwun Tong and Tsuen Wan lines. Although the Kwun Tong Line tracks had already been laid in 1979, the station was not used until the opening of the Tsuen Wan Line on 10 May 1982.