Renowned Japanese artist Shinkisen Yui's works at the C102 Comic Exhibition have sparked controversy, with suspicions that he repeatedly used AI for his paintings. The article explores the sudden change in his artistic style, the doubts from netizens, and the impact of AI painting technology on artists and their fans. The continuous advancement of AI painting technology has made it increasingly difficult for people to distinguish whether a painting was created with AI, leading to reflections on the professional ethics and authenticity of artists' works. In the future, as AI becomes more widespread and applied, discussions and controversies surrounding artistic creation will continue to escalate.