, ▁or ▁ 1 0 0 ▁in ▁Be ij ing ▁Sub way ▁ticket ▁machines . ▁The ▁depos it ▁is ▁used ▁to ▁cover ▁non - su fficient ▁funds ▁for ▁a ▁single ▁trip , ▁and ▁can ▁be ▁ref und ed ▁when ▁the ▁card ▁is ▁returned . ▁After ▁the ▁last ▁use ▁of ▁the ▁card , ▁it ▁will ▁remain ▁its ▁value ▁for ▁three ▁years , ▁until ▁the ▁month ▁before ▁the ▁one ▁travel led ▁in . ▁ ▁When ▁pay ing ▁by ▁the ▁card , ▁passengers ▁get ▁ 5 0 % ▁off ▁the ▁normal ▁bus ▁fare ▁within ▁the ▁municipality , ▁and ▁ 2 0 % ▁off ▁outside ▁the ▁municipality , ▁except ▁on ▁some ▁special ▁purpose ▁routes . ▁However , ▁pay ing ▁by ▁Y ik at ong ▁card ▁gives ▁no ▁disc ount ▁on ▁sub way ▁or ▁tax i ▁far es . ▁More ▁and ▁more , ▁by ▁trav elling ▁on ▁bus es , ▁one ▁must ▁check ▁in ▁and ▁check ▁out , ▁just ▁like ▁on ▁the ▁met ro ▁system ▁( Oct ober ▁ 2 0 1 5 ), ▁except ▁on ▁special ▁routes ▁with ▁flat ▁fare . ▁ ▁The ▁previous ▁month ly ▁passes ▁have ▁been ▁can ce led . ▁Instead , ▁ 3 ▁kinds ▁of ▁short - term ▁passes ▁were ▁introduced ▁on ▁ 2 ▁February ▁ 2 0 0 7 ▁for ▁tour ists . ▁There ▁are ▁ 3 - day , ▁ 7 - day ▁and ▁ 1 4 - day ▁passes ▁for ▁bus es ▁only , ▁which ▁cost ▁C N Y ▁ 1 0 , ▁C N Y ▁ 2 0 ,