Five elements of viscera: wood (liver), fire (heart), soil (spleen), gold (lung), water (kidney) and then back to wood (liver). You can draw a circle or a five-pointed star, and it is easy to see the relationship between the points. The adjacent relationship between mother and child is' fate' and' gram'. For example, wood fire (the liver nourishes the heart with blood), and wood fire (the heart is supplied with liver blood) invades the spleen when qi is full and becomes a disease. At this time, liver evil and temper will weaken from normal. When spleen pathogen invades the liver, the function of the liver will be weakened from the normal state. The influence of multiplication is lighter than that of substitution, which is the standard to adjust the balance. Multiplication is the judgment of syndrome type at onset. The root of the relationship between them is dialectical stipulation. As for the cause, it refers to the six evils. Wind, cold, heat, dampness and fire dryness' are the part of exogenous pathogens. It is also divided into' fire caused by wind, cold, dampness and dryness' without' summer heat'), which leads to liver diseases caused by exogenous pathogenic factors, or liver depression caused by emotions (wood fire)' liver wind moving internally' belongs to the internal cause of fire, and the liver is mainly characterized by rising and taking the initiative ('wind, heat, dampness, dryness and coldness' corresponds to' liver and heart' Of course, there is no need for temporary liver wind here. For example, it is only used when you are diagnosed with Parkinson's disease, such as convulsions and epilepsy.