Asparagus, cold in nature, sweet and bitter in taste, belonging to the lung, kidney meridian, has the effect of nourishing yin and moistening dryness, clearing the lungs and generating fluids, used for lung dryness and dry cough, coughing and phlegm viscous, lumbar and knee pain, bone vapor and tidal fever (a burst of heat, feel the heat from the bone outward penetration), internal heat and thirst (internal fever accompanied by symptoms such as overeating, drinking and urinating), fever and fluid injuries, intestinal dryness, constipation and so on. 1. Lung Yin Deficiency: Tendon is sweet, bitter, cold and moist, good at clearing lungs and moistening dryness. Treatment of dryness injury to the lungs, dry cough without phlegm, or phlegm less and sticky and other mild symptoms, can be taken with maitake to enhance the effect of nourishing yin and moistening the lungs (by replenishing the lungs to moisturize the lungs). 2. Kidney yin deficiency: asparagus enters the kidney meridian and has the effect of nourishing the kidney and lowering fire, nourishing kidney yin, clearing and lowering the fire, generating fluids and moisturizing dryness. It can be used in the treatment of kidney yin deficiency, yin deficiency and fire exuberance (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency fire) such as tidal fever (a burst of heat) and spermatorrhea, etc. It can be combined with Radix Rehmanniae Praeparata and Rhizoma Ziziphi, etc., in order to nourish the kidney yin and reduce fire (nourish yin and essence and lower the fire). 3. Stomach yin deficiency: tian dong enters the stomach meridian, which can benefit stomach yin, clear stomach heat, produce fluids and moisten the intestines. For the treatment of internal heat and thirst, and thirst due to heat illness, it can be combined with maitake, Zhimu, etc., in order to clear the lung fire, nourish yin and produce fluids to quench the thirst (to promote the production of fluids to alleviate thirst); for the treatment of intestinal dryness and constipation due to heat and fluid injury, it can be combined with xuan shen, sheng di, Zhimu, etc., in order to increase the effect of clearing and moisturizing. Patients who need medication should be under the guidance of a doctor and should not take medication without authorization.