The ancients knew the body through the concepts of qi and blood, meridians and acupoints. Of course, from the perspective of modern anatomy, it may be a bit mysterious. Happily, through the anatomical study of fascia, the bridge between the two systems has been established. Fascia connects the whole human body, whether it is limbs, trunk or internal organs. Some studies have found that the acupoints mentioned in Chinese medicine are mostly fascial nodules. Because of the integrity of fascia and the nature of internal and external connection, the function of internal organs can be repaired and improved by boosting fascia, which may be the reason why traditional Chinese medicine can treat internal diseases externally. Family-handed boxing can be divided into two ways: health preservation and martial arts. From a healthy point of view, Neijia Boxing pays more attention to relaxing and lengthening the body, which is very helpful for dredging meridians, promoting blood circulation and removing blood stasis. From the perspective of martial arts, Neijia Boxing emphasizes compound and overall movements in order to train overall strength, not just local muscle strength. Of course, modern fighting also emphasizes the overall strength, which is also very useful, but relatively rough.