i ▁( H ano i ), ▁who ▁wore ▁á o ▁g iao ▁l ĩ n h ▁with ▁long ▁sk ir ts ▁and ▁loose ▁long ▁hair . ▁Hence , ▁wrapping ▁scar f ▁around ▁head ▁became ▁a ▁unique ▁custom ▁in ▁the ▁south ▁then . ▁From ▁ 1 8 3 0 , ▁Min h ▁M ạ ng ▁em peror ▁force ▁every ▁civil ian ▁in ▁the ▁country ▁to ▁change ▁their ▁clothes , ▁that ▁custom ▁became ▁popular ▁in ▁the ▁whole ▁Vietnam . ▁ ▁Character istics ▁ ▁Kh ă n ▁v ấ n ▁is ▁a ▁text ile ▁rectangle ▁long ▁and ▁quite ▁thick , ▁co iled ▁around ▁the ▁head . ▁According ▁to ▁the ▁decre es ▁of ▁N gu y ễ n ▁dynast y ▁written ▁in ▁the ▁Historical ▁chron icle ▁of ▁ Đ ạ i ▁Nam , ▁the ▁Vietnam ese ▁initially ▁remained ▁faithful ▁to ▁the ▁Champ a ▁style , ▁but ▁gradually ▁renov ated ▁to ▁suit ▁each ▁period ▁of ▁time ▁and ▁for ▁each ▁social ▁class . ▁ ▁In ▁addition , ▁according ▁to ▁the ▁law ▁of ▁N gu y ễ n ▁D ynast y , ▁the ▁problem ▁of ▁being ▁too ▁short ▁and ▁thin ▁was ▁prohib ited , ▁but ▁too ▁long ▁and ▁thick ▁was ▁also ▁critic ized ▁as ▁ugly . ▁ ▁Types ▁ ▁There ▁are ▁many ▁types ▁of ▁k h ă n ▁v ấ n , ▁but ▁they ▁are ▁basically ▁class ified ▁into ▁three ▁types : ▁ ▁Kh ă n ▁v ấ n ▁for ▁males ▁ ▁Kh ă n ▁v ấ n ▁for ▁men , ▁hand y ▁and ▁cas ual . ▁Use ▁a ▁thick