▁students ▁by ▁playing ▁Be eth oven , ▁with ▁the ▁intent ▁of ▁prevent ing ▁a ▁violent ▁out break ▁among ▁the ▁students . ▁The ▁headquarters ▁also ▁chose ▁to ▁dedic ate ▁two ▁hours ▁of ▁air time ▁per ▁day ▁to ▁a ▁free ▁forum , ▁during ▁which ▁any ▁person ▁could ▁broadcast ▁their ▁thoughts ▁to ▁the ▁masses . ▁On ▁Children ’ s ▁Day , ▁the ▁scope ▁of ▁the ▁broadcast ing ▁system ▁was ▁further ▁expanded ▁to ▁broadcast ▁the ▁headquarters ’ ▁message ▁of ▁dem ocracy ▁to ▁the ▁children ▁with ▁the ▁assumption ▁that ▁they ▁would ▁continue ▁the ▁movement ▁once ▁they ▁entered ▁university . ▁Despite ▁these ▁us ages , ▁the ▁students ’ ▁loud spe akers ▁were ▁low ▁power ed , ▁and ▁easily ▁d rown ed ▁out ▁by ▁government ▁speak ers . ▁The ▁Chinese ▁Commun ist ▁Party ▁( CC P ), ▁however , ▁stated ▁that ▁the ▁students ▁in ▁general ▁installed ▁the ▁loud spe akers ▁il leg ally , ▁and ▁that ▁a ▁small ▁minor ity ▁util ized ▁them ▁to ▁attack ▁Party ▁and ▁state ▁leaders , ▁dis sem inate ▁counter re volution ary ▁propag anda , ▁and ▁promote ▁over throw ing ▁the ▁C CP . ▁ ▁In ▁order ▁to ▁ful fill ▁its ▁defence ▁mand ate , ▁the ▁Head quarters ▁established ▁a ▁system ▁of ▁pick ets ▁( road ▁block ades ) ▁and ▁student ▁mar sh als ▁to ▁control ▁the ▁streets ▁surrounding ▁the ▁square . ▁Sch olar ▁Andrew ▁Sc ob ell ▁agre es ▁with ▁Li ▁Lu ▁that ▁student ▁pick ets ▁were ▁effective ▁until ▁June ▁ 3 ▁in ▁keeping ▁the ▁People ’ s ▁Liber ation ▁Army ▁( P LA