Niu Qi is an alias of Niubizi, a genus of Amaranthaceae, which is sweet, bitter and cold in taste. It is effective in promoting blood circulation, draining the meridians and dispelling wind and dampness, and can be used for stagnant menstrual flow, bruises and injuries. Ox knee can draw blood downward, tonify the liver and kidneys, strengthen tendons and bones, promote blood circulation and facilitate joints, and is effective for pain in the back and knees and rheumatism and paralysis. Modern pharmacological studies have shown that hyssop can promote the secretion of digestive juices, speed up gastrointestinal motility, and relieve indigestion, and that its many active ingredients can speed up blood circulation, prevent elevated blood pressure and blood lipids, and prevent cardiovascular disease.