▁refuge es ▁from ▁main land ▁China ▁that ▁had ▁power ed ▁the ▁growth ▁of ▁Hong ▁Kong ▁since ▁the ▁Second ▁World ▁War . ▁In ▁ 1 9 7 4 , ▁the ▁' touch ▁base ' ▁was ▁introduced , ▁under ▁which ▁only ▁those ▁imm igr ant ▁arrival s ▁who ▁reached ▁the ▁urban ▁areas ▁were ▁allowed ▁to ▁stay . ▁Six ▁years ▁later , ▁it ▁was ▁replaced ▁by ▁a ▁policy ▁of ▁rep atri ation ▁for ▁all ▁illegal ▁arrival s . ▁ ▁Culture ▁ ▁Met ric ation ▁The ▁Met ric ▁System ▁was ▁adopted ▁under ▁the ▁ 1 9 7 6 ▁Met ric ation ▁Ord in ance . ▁Sub sequently , ▁many ▁of ▁the ▁wet ▁mark ets ▁and ▁traditional ▁Chinese ▁medicine ▁sh ops ▁used ▁the ▁old ▁Chinese ▁system ▁for ▁at ▁least ▁another ▁de cade . ▁ ▁Education ▁The ▁Hong ▁Kong ▁government ▁introduced ▁six ▁years ▁of ▁free ▁comp uls ory ▁education ▁in ▁ 1 9 7 1 , ▁and ▁expanded ▁it ▁to ▁nine ▁years ▁in ▁ 1 9 7 8 . ▁Comp an ies ▁were ▁also ▁seeking ▁well ▁educated ▁employees ▁for ▁complex ▁projects . ▁Se vent y - two ▁percent ▁of ▁over se as ▁gradu ates ▁between ▁ 1 9 6 2 ▁and ▁ 1 9 7 6 ▁would ▁come ▁back ▁to ▁Hong ▁Kong ▁to ▁take ▁on ▁highly ▁sk illed ▁domestic ▁positions . ▁ ▁Dom estic ▁entertain ment ▁On ▁ 7 ▁September ▁ 1 9 7 5 , ▁Com mer cial ▁Television ▁was ▁established . ▁It ▁provided ▁competition ▁for ▁the ▁other ▁two ▁other ▁companies : ▁Red iff usion ▁Television ▁and ▁Television