Li Shizhen's patron is Hu Chenglong. Compendium of Materia Medica, a 654.38+09,000-word masterpiece, is of great scientific value. At that time, it was unknown and it was difficult to find a bookseller to print it. Without the recognition of famous artists and the support of the government, it is risky to print this book privately. Later, the Compendium of Materia Medica, which was completed in 12, was finally favored by Hu Chenglong, a Nanjing bibliophile and publisher. He thinks this book is very valuable, and is willing to support Li Shizhen and pay for engraving.