▁least ▁val ued ▁currency ▁unit ▁after ▁the ▁Iran ian ▁r ial ▁as ▁of ▁ 2 8 ▁November ▁ 2 0 1 4 . ▁Since ▁ 1 9 ▁June ▁ 2 0 1 4 , ▁the ▁Vietnam ese ▁d ong ▁has ▁been ▁de valu ed ▁a ▁total ▁of ▁five ▁times ▁in ▁an ▁effort ▁to ▁help ▁sp ur ▁exports ▁and ▁to ▁ensure ▁the ▁stability ▁of ▁the ▁currency . ▁ ▁( S ources : ▁trad inge conom ics . com , ▁im f . org ) ▁ ▁See ▁also ▁Vietnam ese ▁c ash ▁V ND ▁Index ▁Econom y ▁of ▁Vietnam ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Co ins ▁and ▁Bank notes ▁of ▁Vietnam ▁and ▁French ▁Ind och ina ▁ ▁Category : C urrency ▁symbols ▁Category : C urr encies ▁of ▁Vietnam ▁Category : C urr encies ▁introduced ▁in ▁ 1 9 7 8 <0x0A> </s> ▁C ui ▁( ), ▁altern atively ▁sp elled ▁Ts ui ▁or ▁Ts way , ▁is ▁one ▁of ▁the ▁ 1 0 0 ▁most ▁common ▁s urn ames ▁in ▁China , ▁with ▁around ▁ 0 . 2 8 % ▁of ▁the ▁Chinese ▁population ▁having ▁the ▁surname ▁( around ▁ 3 . 4 ▁million ▁in ▁ 2 0 0 2 ). ▁ ▁It ▁is ▁also ▁one ▁of ▁the ▁most ▁common ▁s urn ames ▁in ▁Korea , ▁with ▁around ▁ 4 . 7 % ▁of ▁the ▁population ▁having ▁the ▁surname ▁in ▁South ▁Korea ▁( 2 . 4 ▁million ▁in ▁ 2 0 1 3 ). ▁ ▁In ▁China , ▁C ui ▁is ▁commonly ▁found