It's the mother of Nie Zening and An An. "Sister has a younger brother" is a reality show about the growth of brother and sister. Through the real record of brother and sister's daily life, the pluralistic coexistence mode of brother and sister with natural relationship is restored, and the mutual companionship and their respective growth in the process of getting along with each other are discussed. Artist guests in the observation room will convey family feelings and the happiness of brothers and sisters accompanying each other to the public through their observation of their lives.