It's Song Haoyu's brother's child. In the TV series Please Be My Family, Xuan was born to Song Haoyu's twin brother and Qi Sitian, so Xuan is a child of the Song family. In the TV series Please Be My Family, Jessica Hester Hsuan and chenchen are separated twins. They are the man's brother and the woman's sister, and they gave birth to twins. Boys are raised by the man and girls by the woman's sister.