Beijing opera depends on sound, and calligraphy depends on pen. The voice has real voice and falsetto voice, and the pen has hidden front. Tsing Yi and Xiao Sheng use falsetto, which is the Tibetan Front. Old students and old Dan use their real voices, that is, show their faces.
The true and false sounds alternate, and the hidden front and the exposed front are mixed. Just right is art! Calligraphy is horizontal and vertical, pursuing breath; Beijing opera has clear pronunciation and mellow voice, and pays attention to taste.