Because it was played by the same actor. According to the query of Tencent Video app, Yan Chiwu, played by sixteen disciples Wayne, was called Xiaoyan Mo Jun because she became the younger brother of a two-winged bird's concubine. This is determined by the role setting and plot development. Three Pillowcases of Sanshengshi tells the story of the 2000-year entanglement between Bai, the queen of Qing Dynasty, and Donghua, the owner of Taichen Palace.