In June 2000, MTRCL proceeded with its plans to retrofit 2,960 pairs of platform screen doors at all 30 underground stations on the Kwun Tong line, Tsuen Wan line, and Island Line in a six-year programme.
Bulan Juni 2000, MTRCL merencanakan akan memasang 2.960 pasang pintu screen platform di 30 stasiun di Jalur Kwun Tong, Jalur Tsuen Wan, dan Jalur Pulau dalam 6 tahun.