Since 1565, Li Shizhen has successively visited Wudang Mountain, Lushan Mountain, Maoshan Mountain, Niushou Mountain, Huguang, Anhui, Henan, Hebei and other places to collect drug specimens and prescriptions, and worshipped fishermen, woodcutters, farmers, rickshaw pullers, medicine workers and snake catchers as teachers, referring to 925 kinds of books on medicine in previous dynasties, and recording tens of millions of words. There are many works, such as "Eight Veins of Strange Classics" and "Linghu Veins".