▁of ▁Bang l adesh , ▁there ▁are ▁eleven ▁metropol itan ▁areas : ▁D h aka ▁North , ▁D h aka ▁South , ▁Gaz ip ur , ▁Ch itt ag ong , ▁Raj sh ah i , ▁Kh ul na , ▁Syl het , ▁Bar is al , ▁and ▁Rang pur . ▁Land s ▁are ▁highly ▁pr iced ▁and ▁residents ▁are ▁considered ▁to ▁have ▁a ▁better ▁urban ▁l ifest yle . ▁Special ▁police ▁depart ments ▁are ▁all otted ▁for ▁the ▁metropol itan ▁cities , ▁and ▁there ▁are ▁city ▁corpor ations ▁for ▁which ▁may ors ▁are ▁elected ▁for ▁five - year ▁reg imes . ▁Most ▁of ▁these ▁cities ▁have ▁population ▁density ▁of ▁ 3 5 , 0 0 0 / square ▁mile ▁or ▁more . ▁D h aka ▁is ▁the ▁wealth iest ▁city ▁out ▁of ▁all ▁of ▁them ▁and ▁is ▁considered ▁a ▁Meg acity ▁because ▁its ▁population ▁sur pass ed ▁ 1 0 ▁million . ▁ ▁China , ▁People ' s ▁Republic ▁of ▁ ▁China ▁is ▁known ▁for ▁its ▁large ▁number ▁of ▁met rop oles , ▁with ▁recogn ised ▁" ti ers " ▁that ▁class ify ▁main land ▁met rop oles . ▁Nation ally , ▁the ▁largest ▁met rop oles ▁include ▁Be ij ing , ▁Shang hai , ▁Gu ang z hou , ▁Sh enz hen , ▁and ▁Hong ▁Kong , ▁the ▁first ▁four ▁being ▁the ▁" First - T ier ▁C ities " ▁( 一 线 城 市 ). ▁Second - t ier ▁cities ▁are ▁numerous ▁and ▁consist ▁of ▁regional ▁cent res , ▁such