무송
In her analysis of Yangzhou storytelling, Børdahl noted that the aforementioned tale about Zhou and Wu Song uses different forms of dialogue for both characters. Wu speaks square mouth utilizing standard Mandarin without rusheng (short glottal syllables). On the contrary, Zhou speaks squaremouth using the Yangzhou tone system, which "does" utilize rusheng syllables. Therefore, she believes "square mouth dialogue should at least be divided into two subcategories, namely the Wu Song variant—without rusheng, and the Zhou Tong variant—with rusheng".