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Weizhong (BL40) is located in the center of the popliteal crease, amidst the transverse vessels. It treats lower back pain rendering the body unable to rise, with a sour and heavy sensation pulling along the spine; wind epilepsy and muscle spasms; aggravation in winter making movement difficult; severe wind-bi pain; prolonged febrile diseases keeping one bedridden; difficulty in extending and flexing the feet and knees. Needling brings immediate health and peace.
[Note] Weizhong (BL40): The acupoint is located in the center of the popliteal fossa, in the depression of the arterial pulse at the crease. It indicates indications such as heavy and dragging pain in the lumbar and spinal regions, lower back pain, muscle spasms in both calf muscles causing painful immobility, wind-bi pain with migrating nature, refractory febrile diseases, and painful inability to extend or flex both knee joints. Needle depth: 5 fen; retain needle for 7 breaths; moxibustion is contraindicated.

Chengshan (BL57), named for its resemblance to a fish belly, is located between the separated muscles of the calf. It is effective in treating lower back pain, hemorrhoids with difficulty in defecation, foot strike (podagra/foot qi) accompanied by knee swelling, coldness and soreness in both feet; tossing and turning leading to epidemic diseases, chills and alternating hot/cold in malaria; cholera with muscle spasms. Needling brings immediate relief.
[Note] Chengshan (BL57): The acupoint is located in the separation of muscles at the lower tip of the calf muscle. It indicates indications such as pain in the waist and back, hemorrhoidal swelling, difficulty in defecation, foot strike with knee swelling, shin soreness and heel pain, typhoid fever and epidemics, malarial chills and fever, chills preventing walking or standing, and cholera with muscle spasms. Needle depth: 5 fen; moxibustion: 5 cones.

Taichong (LR3) is located two cun posterior to the interphalangeal joint of the great toe. The pulsation of the artery here can determine life or death. It can treat convulsive epilepsy and wind-stroke. It treats disorders of the throat and heart/axilla region, immobility of both feet; seven types of hernia with unilateral swelling and drooping, eyes obscured like clouds; it also treats lower back pain, demonstrating miraculous efficacy upon needling.
[Note] Taichong (LR3): The acupoint is located in the depression two cun posterior to the metatarsophalangeal joint of the great toe. The arterial pulse is palpable; if present, the patient lives; if absent, the patient dies. It indicates indications such as acute and chronic infantile convulsions, epileptic fits, throat pain, fullness in the chest and axilla, cold-damp foot strike pain with difficulty in walking, abdominal hernia with unilateral drooping and pain, dim vision, and pain in the waist and back. Needle depth: 3 fen; retain needle for 10 breaths; moxibustion: 3 cones.