Notes on buttoning up suits and waistcoats

　　 Tops: There are two types of tops, double-breasted and single-breasted. Wearing double-breasted tops generally need to button up all the buttons, sometimes can not be buttoned below a grain. Single-breasted tops can not be buttoned below a grain or all do not buckle, do not button all the buttons on. Vest: often left unbuttoned with the lower button. If a tie is worn, it should be placed inside the waistcoat, taking care not to show the tip of the tie. For formal occasions, wear a three-piece or two-piece suit and avoid adding a sweater vest or jumper.