Huang Tingjian. According to information from Query Literature Network, the writer who proposed turning iron into gold and transforming the body into gold is Huang Tingjian. Huang Tingjian was a famous writer and calligrapher in the Northern Song Dynasty, and the founder of the Jiangxi Poetry School. Huang Tingjian, Chao Buzhi, Zhang Lei and Qin Guan all studied under Su Shi's sect. They are collectively known as the Four Schools of Su School. They are as famous as the calligraphers Su Shi, Mi Fu and Cai Xiang of the Northern Song Dynasty and are known as the "Four Schools of Song Dynasty".