Medicine primer has the function of leading the meridian (i.e., concentrating the drug ingredients to the lesion), enhancing the healing effect, detoxifying effect, stomach protection effect, and correcting taste effect. The following are some of the commonly used drug attractants: salt, salty and cold, enters the kidney, stomach and large intestine meridians, and has the effect of clearing water and detoxifying. The treatment of kidney Yin deficiency of six flavors of Dihuangwan, Qiju Dihuangwan, it is advisable to use light salt water water to serve, to take its salty can enter the kidney. Ginger Pungent, slightly warm, enters the lung and spleen meridians, and has the effect of relieving the symptoms of sweating, warming the middle and relieving cough, and warming the lung to stop coughing. When treating wind-cold colds and vomiting, 3-5 slices of ginger are often used as a guide to enhance the therapeutic effect. White onion Pungent, warm, enters the lung and stomach meridians, has the effect of dispersing cold and Yang, detoxifying and dispersing knots. For the treatment of cold and wind, cold and blocked urine, 5~7 scallions are often used as a primer. Langshen Cao Sweet, light, slightly cold, enters the heart and small intestine meridian, can clear the heart and eliminate irritation, diuretic and laxative. For the treatment of heart fire and short, red urine, a small handful of Dangxin Cao is recommended as a guide. Japonica rice is sweet and flat, enters the stomach meridian, and has the effect of benefiting qi and strengthening the stomach. When treating fire-heat illnesses that require large doses of bitter-cold drugs to prevent bitter-cold defeating the stomach, a small handful of japonica rice is often taken as a primer to protect stomach qi. For example, Bai Hu Tang, which is used to clear summer heat. Jujube is sweet, warm, and belongs to the spleen and stomach meridians, which can benefit the qi and nourish the middle, nourish the blood and calm the mind, and harmonize the medicinal properties. When using harsh drugs (such as Gansui, Coriander, Daji, Scapularia), often take 10~15 pieces of jujube to moderate the medicinal properties to prevent poisoning. Honey is sweet, flat, enters the lung, spleen and large intestine meridians, nourishes, moistens and detoxifies. It can nourish, moisten and detoxify. When treating lung deficiency, dry heat and constipation, 1~2 tablespoons of honey is often used as a guide. Vinegar is sour and flat, with the effect of dispersing stasis and relieving pain, astringent and solid. For the treatment of women’s defecation, blood fever and leakage, roundworm abdominal pain, 1 tablespoon of vinegar is often used as a primer. Brown sugar Sweet, warm, can tonify the middle and dispel blood stasis. For the treatment of maternal dew and cold pain in the abdomen, 20-30 grams of brown sugar is often taken as a primer.