Lock yang must generally be concocted before use. Concocting refers to the processing of herbs, such as cutting slices, roasting, calcining, steaming, quenching and so on. The method of concocting lock yang is washing, moistening, cutting thin slices and drying. Lockyang has the effect of tonifying the kidney and assisting yang, laxative and laxative. It is mainly used for treating kidney yang deficiency (deficiency of yang energy in the kidneys), impotence and coldness of essence, deficiency of liver and kidneys (weakness of liver and kidneys), impotence and weakness of the feet and tendons, and constipation due to dryness of intestines and bowels. It is also contraindicated in cases of yin deficiency and fire (deficiency of yin essence in the body, resulting in hyperactive fire), spleen deficiency and diarrhea (diarrhea caused by a weak spleen), and constipation due to solid heat. Chinese medicines should be concocted by professionals and used under the guidance of professional doctors, and should not be concocted or used by oneself to avoid causing adverse reactions.