"Newly revised Materia Medica": "Five Zhi, "Jing" Cloud: All are born in Wuyue in five colors. All the guests have offered, Baizhi may not be Huashan, Heizhi is very Yue, and Chido is yellow and white, rare black. Most of them are non-five medicinal. But Chi is very hard to find one or two, and won't take it for a long time?"