Chenjishan Medicine is a geographical indication product, and its protection mode is the administrative area under the jurisdiction of Jeffery Ji, Dingtao County, Shandong Province. After the stems and leaves wither in winter, dig, cut off the roots, wash and dry. For thousands of years, it has been highly respected for its good taste of "noodle, sweet, fragrant, soft and refreshing", the excellent quality of "homology of medicine and food" and the practical value of "medical health care", and has been cared for by people in Jeffery Ji, the origin of this variety. According to legend, after wuyue War, when Li lived in seclusion, he introduced yam from his hometown to make pottery here.

Compared with the two, the taste should be similar, belonging to the sandy soil of the Yellow River impact plain. Personally, I feel that Chen Jishan's medicine tastes soft. Compared with the same kind, Chen Jishan's medicinal materials are mainly characterized by less water, more nutrients and dry matter, and good taste. In addition, it is a specialty, especially the seed of stone, which is rare and suitable for giving gifts.