Nini, the basic law of genius, appeared in the seventh episode, telling the story of an ordinary person bravely pursuing mathematics. In the seventh episode, Nini plays Zifeng Zhang's mother, and she appears in this episode. Although it appears in the form of memories, Nini in the camera is quite amazing. Nini is wearing a light blue sweater, which is more academic against shoulder-length short hair. Looking back and smiling, there is a kind of amorous feelings that can't be concealed.