As part of a project to reduce congestion at Quarry Bay, the Kwun Tong line was briefly extended to North Point on 27 September 2001. This station did not last as the terminus for long, as the newly built Tseung Kwan O line would take over the cross-harbour portion of the route in 2002. The Kwun Tong line was instead diverted in two phases: to Yau Tong station on 4 August 2002 and on 18 August 2002 to Tiu Keng Leng, its present eastern terminus, coinciding with the opening of the Tseung Kwan O line.