You should be talking about The Prodigal Son in the Lunatic Asylum, Episode 15.

After the AI ??face-changing fraud case was over, Shen Yi returned to school and explained the oil painting "The Prodigal Son in the Madhouse" to the students in class. Du Cheng's sister Du Qing attended this class. , this is also Du Qing's first appearance.

"The Prodigal Son in the Bedlam" is a masterpiece by William Hogarth. Faced with the malicious evaluation of Zhao Xiaoxu's landscape paintings by students from the Academy of Fine Arts, Shen Yi gave the referee the best counterattack through facts. At the same time, he used "The Prodigal Son in the Madhouse" to tell us that those who judge others are not others but their own kind, even if they are normal People may also be forcibly defined as crazy by their judges.