The following are the views of Chinese medicine:
"Spirit Pivot Evil Guest": "Those who nourish qi secrete body fluids, inject them into the veins and turn them into blood." "Lingshu Nutrition Society": "The middle jiao is also suitable for the stomach. After the upper jiao is discharged, the recipient secretes dregs, digests body fluid, changes its subtlety, injects it into lung veins, and turns it into blood, making it more expensive. " Driven by qi, blood circulates the whole body, nourishes the viscera and maintains the normal functional activities of various tissues and organs. Su Wen Wu Zang Dai: "The liver can be seen by blood, can be filled with blood, can hold the palm by blood, and can be shot by blood." Pig blood can't clear lung. "Compendium of Materia Medica" records that pig blood is salty and flat, which is the main indication, and can produce blood, miasma, stroke, traumatic injury, fracture, headache and dizziness. In addition, pig blood can also inhibit stones and detoxify. Pig blood is sweet, bitter and warm, and has the effects of detoxification, clearing intestines, enriching blood and beautifying. Pig blood is rich in vitamin B2, vitamin C, protein, iron, phosphorus and calcium.