What is the meaning of "singing and dancing" in the duet? How to explain it?

The performance means of duet can be roughly divided into three types. One is a duet in which two people pretend to be ugly once and talk while singing, which is a veritable "duet"; One is that a person sings and dances together, which is called single head; One is that actors appear on the stage to sing operas in various roles, which is called "pulling operas".

There is a saying that actors have "four skills and one skill" in their expressions. The "four skills" are singing, speaking, doing and jumping; "Stunt" refers to the stunt performed with handkerchiefs, fans, big boards, hand Yu Zi and other props. Four skills "singing" as the head, pay attention to taste, words, sentences, board, sound and strength; "Say" refers to the mouth, mainly gag; "line" pays attention to replacing reality with emptiness; And "dance" mainly means "three dances". Handkerchiefs and fan flowers are the most common "unique skills" in duet, similar to the Northeast Yangko. Yu Zi dancers' big boards and hands are unique. Dancers who hold a big board in their right hand usually hold a swing in their left hand, and they can perform such difficult movements as "swinging willows in the wind", "fairy picking beans", "golden dragon and jade column", "Hei Hu coming out of the mountain", "golden mouse returning to the cave" and "wrapping head and brain". Some dancers hold Yu Zi, a small bamboo board, with two pieces in each hand. There are various ways to play, such as "arm twisting", "waist twisting in chest", "waist twisting in wheel cavity" and "broken flower".