Li Shizhen was a famous medical scholar who has sort of the same stature as Leonardo da Vinci in the West. He published a very long encyclopedia of natural medicine called the Bencao Gangmu. The text was highly detailed and organized, and it was the product of decades of study of rare books and medical texts. He added his own understanding derived from his own medical practice and his family's medical lore. He went on journeys for research. He wanted to survey all the available knowledge of his time and write the most accurate natural medical text ever written. He thought that the medical texts that were generally available were inaccurate and even had dangerous misinformation.