The difference between south almond and north almond is that south almond is long in moistening the lungs and calming the asthma, while north almond is long in lowering the qi, relieving cough and calming the asthma (stopping the cough and calming the wheezing). South almonds, also known as sweet almonds, flat, sweet, produced in the Qinling Mountains, south of the Huaihe River area, often as food, non-toxic, can moisten the lungs and calm wheezing, stomach, moisten the large intestine. South almonds are generally larger than north almonds, left and right symmetry, the surface is light brown. North almonds, also known as bitter almonds, often used as medicine, bitter flavor, slightly warm; a small poison. For the Rosaceae plant mountain apricot, Siberian apricot, Northeast apricot dry mature seeds, to the lung, large intestine meridian. It can lower the qi, relieve cough and asthma, and laxative. It is used for cough and asthma, chest fullness (chest distension and discomfort), phlegm, intestinal dryness and constipation. If you need to use the drug, it is recommended that the professional physician under the guidance of the identification of reasonable application, not self-medication, so as not to delay the condition.