Many young drug abusers end up in Alman Chan 's drug rehab school for youth , which is located in a remote part of Lantau Island west of Hong Kong . Police : Keith is the top drug of choice among young people in Hong Kong . Drug use among those the last four years has jumped Forty percent in under 21 . Police stepping up crackdowns , say parks and public toilets hot spots for drug use . Hong Kong has one third drug rehab center for youth , located on a remote former pig farm .
Police : Keith is the top drug of choice among young people in Hong Kong . Drug use among those the last four years has jumped Forty percent in under 21 . Police stepping up crackdowns , say parks and public toilets hot spots for drug use . Hong Kong has one third drug rehab center for youth , located on a remote former pig farm .