In June NUMBER@1 , ORGANIZATION@1 proceeded with its plans to retrofit NUMBER@2 pairs of platform screen doors at all NUMBER@3 underground stations on the LOCATION@1 , Tsuen Wan Line , and Island Line in a six year programme .

In June NUMBER@1 , The ORGANIZATION@2 proceeded with its plans to retrofit NUMBER@2 pairs of platform screen doors at all NUMBER@3 underground stations on the LOCATION@1 , Tsuen Wan Line , and Island Line in a six year programme .
