▁and ▁working ▁class ▁areas , ▁lower ed ▁age ▁limits ▁in ▁the ▁school ▁ad mission ▁policies , ▁and ▁decre ased ▁cut off ▁scores ▁on ▁achiev ement ▁tests ▁for ▁working ▁class ▁children ▁during ▁the ▁years ▁ 1 9 4 9 ▁through ▁ 1 9 5 7 . ▁Depart ments ▁of ▁education ▁were ▁established ▁for ▁the ▁Be ij ing ▁municipality ▁and ▁each ▁of ▁the ▁Be ij ing ▁districts ▁in ▁ 1 9 5 4 . ▁ ▁D ong ▁J ian h ong ▁and ▁Chen ▁Ti ying ▁wrote ▁that ▁in ▁the ▁Great ▁Le ap ▁For ward ▁period ▁school ▁activities ▁were ▁not ▁focused ▁on ▁education ▁and ▁instead ▁were ▁" most ly ▁devoted ▁to ▁political ▁movements ▁and ▁product ive ▁labor " ▁which ▁produced ▁a ▁low ▁educational ▁quality . ▁During ▁the ▁period ▁many ▁schools ▁established ▁school - oper ated ▁fact ories ▁that ▁their ▁students ▁worked ▁in , ▁and ▁the ▁Be ij ing ▁educational ▁authorities ▁established ▁part - work ▁part - stud y ▁experimental ▁schools ▁and ▁work - stud y ▁programs . ▁ ▁The ▁authorities ▁opened ▁many ▁senior ▁secondary ▁schools ▁and ▁closed ▁many ▁part - stud y , ▁part - time , ▁and ▁voc ational ▁schools ▁during ▁the ▁Cultural ▁Revolution . ▁ ▁In ▁ 1 9 8 6 ▁the ▁starting ▁age ▁for ▁primary ▁education ▁for ▁urban ▁children ▁was ▁changed ▁from ▁ 7 ▁to ▁ 6 . ▁ ▁Dem ograph ics ▁As ▁of ▁ 2 0 1 1 , ▁about ▁ 3 0 , 0 0 0 ▁senior ▁high ▁school ▁students ▁resident ▁in ▁Be ij ing ▁do ▁not ▁have ▁Be ij ing