▁July ▁ 1 9 7 1 . ▁Having ▁been ▁fright ened ▁by ▁the ▁ 1 9 6 7 ▁ri ots , ▁the ▁police ▁tried ▁to ▁prevent ▁the ▁protest . ▁Un necess ary ▁violence ▁er upt ed , ▁leading ▁to ▁the ▁arr ests ▁of ▁students . ▁ ▁The ▁media ▁critic ised ▁the ▁viol ation ▁of ▁dem ocracy . ▁The ▁British ▁police ▁officers ▁involved ▁were ▁sent ▁back ▁to ▁the ▁UK ▁and ▁went ▁un p un ished . ▁Pro tests ▁concerning ▁the ▁defence ▁of ▁Dia oy ut ai ▁Islands ▁continued ▁to ▁be ▁held ▁the ▁following ▁months . ▁ ▁Econom y ▁ ▁Man ufact uring ▁Many ▁factors ▁contributed ▁to ▁the ▁decl ine ▁of ▁manufact uring ▁in ▁Hong ▁Kong . ▁The ▁late ▁ 1 9 7 0 s ▁saw ▁increases ▁in ▁land ▁prices . ▁Al ong ▁with ▁the ▁opening ▁up ▁of ▁global ▁trade ▁with ▁China ▁via ▁the ▁ 1 9 7 8 ▁economic ▁re forms , ▁fact ories ▁were ▁gradually ▁re located ▁to ▁the ▁main land , ▁where ▁labour ▁costs ▁were ▁lower . ▁ ▁At ▁the ▁same ▁time , ▁Singapore ▁and ▁Taiwan ▁under w ent ▁similar ▁develop ments ▁to ▁those ▁of ▁Hong ▁Kong . ▁The ▁compet it iveness ▁of ▁manufact uring ▁similar ▁products ▁led ▁to ▁protection ism ▁to ▁shelter ▁local ▁companies . ▁As ▁a ▁result , ▁there ▁was ▁less ▁demand ▁for ▁Hong ▁Kong ▁goods . ▁ ▁Property ▁and ▁land ▁Following ▁dec ades ▁of ▁immense ▁and ▁sust ained ▁imm igration , ▁the ▁short age ▁of ▁housing ▁in ▁the ▁territory ▁became ▁ac ute . ▁Many ▁lived ▁in ▁squ atter ▁settlement