The escape of seven. Who is Song Zhiya's sister?

Mi Xueer. According to the plot query of The Seven Escapes, in The Seven Escapes, Song Zhiya's sister is a talented director named Mi Xueer who came back from abroad, and Cui Yushu plays the role in the play. The Seven Escapes is a TV series directed by Zhu, written by Jin, and starring,,, Shen Enjing, Yin Zhongxun, Yun-Hee Cho, Jae-yun Jo and Li Dehua. It was released in South Korea on September 5, 2023. The play tells the story of a girl's disappearance mixed with countless lies and desires, and seven of them are involved in major events.