Which of the following is not a correct statement of the characteristics of square dancing

Folk dance is not a correct statement of the characteristics of square dance. The characteristics of folk dance are: singing and dancing, free and lively; skillful use of props, skills combined; vivid plot, distinctive image; self-entertainment, the unity of purpose; the feelings of the improvisation, folk dance refers to the generation and spread in the folk, subject to the constraints of folk culture, improvisation but the style of the relatively stable, self-entertainment as the main function of the form of dance.