Also known as Imperial Physician Yu, he is the Head of the Imperial Academy of Medicine. He has the golden tag [Medical Genius] above his head, visible only to Zhe Qing through her Infrastructure Maniac software. He is described as having a wrinkled face and being elderly. Despite the strange penicillin extraction formula given to him, he felt an intuitive understanding of it as if something had been opened within him. After 18 days of experimentation, he successfully produced the medicine.
