▁ ▁In ▁ 2 0 1 0 , ▁Sh enz hen ▁Special ▁Econom ic ▁Zone ▁was ▁en larg ed ▁to ▁cover ▁the ▁whole ▁Sh enz hen ▁city . ▁Rap id ▁development ▁occurred ▁in ▁the ▁Ba o ' an ▁District . ▁Long h ua ▁District ▁was ▁separated ▁from ▁Ba o ' an ▁and ▁became ▁a ▁district ▁on ▁ 1 1 ▁October ▁ 2 0 1 6 . ▁In ▁ 2 0 1 8 , ▁Gu ang ming ▁District ▁was ▁also ▁separated ▁from ▁Ba o ' an ▁District . ▁ ▁Dem ograph ics ▁The ▁district ▁had ▁a ▁population ▁of ▁ 2 , 7 3 6 , 5 0 0 ▁in ▁ 2 0 1 4 . ▁About ▁ 8 5 % ▁of ▁Ba o ' an ' s ▁population ▁are ▁migr ants ▁from ▁other ▁parts ▁of ▁China , ▁most ▁speaking ▁Standard ▁Chinese ▁( Standard ▁Mand arin ). ▁Hence ▁this ▁made ▁Standard ▁Chinese ▁the ▁primary ▁Chinese ▁variety ▁spoken ▁in ▁the ▁district . ▁C anton ese ▁is ▁also ▁widely ▁spoken , ▁between ▁loc als ▁and ▁migr ants ▁from ▁around ▁Gu ang d ong ▁Province ▁( C anton ▁Province ). ▁ ▁Public ▁Saf ety ▁Ba o ' an ▁has , ▁as ▁of ▁ 2 0 0 8 , ▁a ▁not or iously ▁bad ▁safety ▁record . ▁Since ▁the ▁turn ▁of ▁the ▁mill en ni um , ▁the ▁district ▁has ▁seen ▁a ▁string ▁of ▁high - profile ▁ab du ctions , ▁rob ber ies , ▁and ▁other ▁cases ▁of ▁violent ▁crime . ▁However , ▁in ▁the ▁last ▁ 4