Mainly distributed in East China, Central China and Southwest China, mainly produced in Xinhui, suburbs of Guangzhou, Sihui and Jiangmen; Sichuan Jiangjin, Chongqing, Hechuan, Jiangbei, Fuling, Qijiang and Jianyang; Minhou, Fujian, Zhangzhou; Huangyan, Wenzhou, Taizhou, Quxian, Zhejiang; Jiangxi Nanfeng, Zhangshu and other places. Guangdong Xinhui, Jiangmen area produced "GuangChenpi" is authentic. Chenpi introduction:

Chenpi, the name of traditional Chinese medicine. It is the dry and mature peel of Rutaceae citrus and its cultivated varieties. Medicinal materials are divided into "Chenpi" and "Guangpi". Picking ripe fruits, peeling, sun drying or low temperature drying.

It is often peeled into several petals, the petals are connected, and some of them are irregular, with a thickness of 1 ~ 4 mm, and the outer surface is orange-red or reddish-brown, with fine wrinkles and sunken punctate oil chambers; The inner surface is yellowish white and rough, with yellowish white or yellowish brown fibrous vascular bundles.