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(This is the bone of the waist and hip, also referred to as "Huai". It is located on both sides of the waist flanking the spine, in the depression when standing upright. Pressing it reveals the bony joint mechanism where movement occurs.) It belongs to the Foot-Shaoyang Gallbladder Channel (The *Suwen* states: "Flanking the hip is the Ji (mechanism), and above is the Guan (door hinge)." It further states: "When Shaoyang Qi rebels, the joint mechanism becomes dysfunctional, resulting in an inability to walk with the waist or look back with the neck." It also states: "Lumbar pain radiating to the lower abdomen and controlling the genitals, preventing supine posture; needle the two Huai points above the Sheng at the intersection of the lumbar and sacral regions, using the number of days corresponding to the waxing and waning of the moon as the count.")

(This is the Biyan, corresponding to the area of the Huantiao acupoint. It is called 'Shu' because the Jian bone rotates like the pivot of a door, and is also known as Biguan.) It belongs to the Foot-Shaoyang Gallbladder Channel (The *Suwen* states: "When pathogenic factors lodge in the collaterals of the Foot-Shaoyang channel, they remain in the Shu, causing pain in the thigh that prevents lifting." Zhu Danxi stated: "Pain at the Huantiao point warns of the potential development of Gujugu [bone-abscess abscess].") It also belongs to the Foot-Taiyang Bladder Channel (The *Lingxu* states: "The Foot-Taiyang channel runs inside the paravertebral muscles, passing through the Bisu. It further states: The two elbows, two axillae, two thighs, and two popliteal fossae are called the 'Eight Xu' (Empty places). These are locations of joint mechanisms, where True Qi passes and blood collaterals circulate. Pathogenic qi and evil blood cannot stay here. If they do stay, they damage the sinews and collaterals, causing the joints and mechanisms to lose flexion and extension, leading to spasms.") It concurrently belongs to the Foot-Yangming Stomach Channel (The *Lingxu* states: "The sinews of the Foot-Yangming channel knot at the Bisu, ascend along the costal region, and connect to the spine. It further states: The Foot-Yangming channel merges at the Qichong point and descends to the Biguan, reaching the Futu point. Gu Yingbai stated: The Biguan acupoint is issued by the Foot-Yangming channel, located at the anterior margin of the Bisu. Dou Shi's designation of the area below the abdomen and on the upper leg as Bisu was originally not erroneous. If Bisu's alias is Biguan, then what is referred to as 'Guan behind Jian' applies here; this refers only to the single acupoint Biguan. Cheng Zhi only knew the single acupoint Biguan but did not know that Bisu could be named Biguan, thus mistakenly considering Dou Shi's view incorrect, which was inevitable. The old texts duplicating Biguan were largely incorrect.")

(Located above the auxiliary bone of the thigh, below the transverse bone of the waist, in the middle of the lateral aspect of the thigh. Take the point while standing sideways and shaking the body; the one where the tendon moves and responds to touch is the correct location.) It belongs to the Foot-Shaoyang Gallbladder Channel (The *Suwen* states: "Above the auxiliary bone and below the transverse bone is the Jian; above the Jian is the Ji; behind the Jian is the Guan. It further states: For stiff knee [Jianxi], unable to extend and flex, treat its Jian region.")