Zanthoxylum bungeanum, also known as pepper and pepper, is millet with oval leaves and white flowers. The origin of pepper is located in the tropical region of central Latin America, and the country of origin is Mexico. China's pepper producing areas are mainly distributed in Henan, Xinjiang, Gansu, Inner Mongolia, Shandong, Hebei, Yunnan and other provinces, among which Henan and Hebei provinces mainly plant Chaotian pepper, while Shandong Province mainly plants Yiduhong and Wangduhong.