South five plus bark is five plus bark alias, north five plus bark is fragrant plus bark alias. The difference between Wujia Pi and Xiangjia Pi lies in its toxicity and efficacy. Wuga Pi has the efficacy of dispelling wind and dampness (dispelling wind and dampness in the body), tonifying the liver and kidney, strengthening the muscles and bones, and inducing diuresis and eliminating swelling (facilitating urination and eliminating edema); Xiangjia Pi has the efficacy of inducing diuresis and eliminating swelling, dispelling wind and dampness, and strengthening the muscles and bones. 1. Toxicity: Wujia Pi is non-toxic and can be used for a long time, while Xiangjia Pi is poisonous and should not be used for a long time and in excess. 2. Efficacy: Wujia Pi, flavor pungent, bitter, warm. Attributed to the liver, kidney meridian. Used for rheumatism paralysis, impotence and weakness of the muscles and bones, pediatric line delay, weakness, edema, foot odor. Xianggapi, pungent, bitter, warm; toxic. Attributed to liver, kidney and heart meridians. It is used for swelling of the lower limbs, palpitations (rapid heartbeat, often accompanied by panic), shortness of breath, wind-cold-dampness paralysis (paralysis of the limbs caused by wind, cold, and dampness evils that invade the body), lumbar-knee soreness and tenderness (a feeling of soreness and weakness of the lumbar and knee areas), and so on. The difference between Wu Jia Pi and Xiang Jia Pi should be consulted with a clinician, is prohibited for those who are allergic to it, and used under the guidance of a physician.