What are the four major drugs?

1. Bozhou: Bozhou is Huatuo's hometown. Liu Kai, a writer in the Qing Dynasty, said in a poem: "Peony flowers are outside Huang Xiao, and the morning glow is born in ten miles and five miles. Everyone grows flowers like Sang Ma. "

2. Anguo, Hebei Province: It is famous for its "qi zhou Four Wonders" and won the reputation that "grass can be used as medicine in Anguo, and medicine can only be fragrant in qi zhou".

3. Jiangxi Cinnamomum camphora: Since ancient times, it has the reputation of "medicine is not unified, medicine is ineffective". As early as the Jian 'an period in the Eastern Han Dynasty, Taoist Zhang Daoling and Ge Xianweng practiced here.

4. Henan Yuzhou