At home the cooking, decorating and cleaning for Tet heightens. Since it is traditional that all cooking and housework are avoided during the first three days of Tet, many spend Tet Nien preparing Tet delicacies, preening and decorating the houses with symbolic plants such as cay neu, hoa dao and kumquat, and decorative red banners called cau doi in preparation of the arrival of the esteemed guests and relatives during the coming days of celebrations.