镵针即今箭头针，主刺皮肤邪肉侵，毋令深入泻阳气，邪正相安荣卫均。
【注】一曰：镵针式图
[1] 经之一曰：镵针者，取法于巾针，去末寸半，卒锐之长一寸六分。
[2]镵者，锐也；卒者，尾也。
[3]谓此针长一寸六分，上去末寸半，下祗留一寸之锋，
欲浅刺不令深入也。
[4]镵针即今箭头针也，主刺邪热病在头身皮肤之证。
[5]毋令深入，深则有伤阳气。
[6]故必分许浅浅刺之，使邪去而正不伤，荣卫得和，则病除矣。
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员针取法于絮针，主治邪气侵肉分，筩身卵锋不伤正，利导分肉邪自平。
【注】二曰：员针式图
[1]经之二曰：员针者，取法于絮针，筩其身而卵其锋，长一寸六分。
[2]筩身卵锋者，谓身直如作筩，末锋员如卵锐也。
[3]员针即絮针也，主治邪气在分肉之间，盖筩身卵锋，利导分肉，
能使邪气行而不伤于肌肉之正气也。
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鍉针之锐如黍粟，恐其深入伤肌肉，按脉勿陷以致气，刺之邪气使独出。
【注】三曰：鍉针式图
[1]经之三曰：鍉针者，取法于黍粟之锐，长三寸半。
[2]黍粟之锐者，员而微尖，利于用补者也。
[3]鍉针之锋，如黍粟之锐，主治邪在脉中。
[4]不欲深入，祗按脉以候气至，刺脉中之邪气，若使独出也。
[5]深按陷至肌肉，邪风虽出，而肌肉之正气必伤矣。
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镵针就是现在的箭头针，主要用来刺治皮肤部位邪气侵袭、长出赘肉（邪肉）的病症。不要刺得太深以免泻伤阳气，从而使邪气与正气相安无事，营卫之气调和均匀。
【注】第一种：镵针样式图
[1]《黄帝内经》中说：镵针，是仿照巾针制作的，去掉末端一寸半，剩下尖锐部分长一寸六分。
[2]“镵”的意思是锐利；“卒”的意思是尾部。
[3]意思是这种针全长一寸六分，上面去掉末端一寸半，下面只保留一寸长的锋刃，
是为了浅刺而不让针深入体内。
[4]镵针就是现在的箭头针，主要用于刺治邪热病邪在头身皮肤部位的证候。
[5]不要刺得太深，刺深了就会损伤阳气。
[6]所以必须浅浅地刺入少许深度，使邪气去除而正气不受伤，营卫之气得以调和，疾病就能痊愈了。
员针是仿照絮针制作的，主治邪气侵袭肌肉分理（分肉）的病症。其针身圆筒状、针锋卵圆形，不损伤正气，能疏通引导分肉间的邪气，使邪气自然平复。
【注】第二种：员针样式图
[1]《黄帝内经》中说：员针，是仿照絮针制作的，针身呈圆筒状，针锋呈卵圆形，全长一寸六分。
[2]所谓“筩身卵锋”，是指针身笔直如同制作竹筒，末端的针锋圆润如卵且略带锐利。
[3]员针就是絮针，主治邪气在分肉之间的病症，因为针身圆筒状、针锋卵圆形，有利于疏导分肉间的邪气，
能使邪气运行排出而不损伤肌肉的正气。
鍉针的尖端像黍米或粟米一样细小，担心它深入会损伤肌肉，按压脉道但不要下陷以引致经气，通过针刺使脉中的邪气单独排出。
【注】第三种：鍉针样式图
[1]《黄帝内经》中说：鍉针，是仿照黍米或粟米的尖端形状制作的，全长三寸半。
[2]所谓“黍粟之锐”，是指针尖圆润而微微尖锐，有利于用于补法。
[3]鍉针的锋刃像黍米或粟米的尖端，主治邪气在脉管中的病症。
[4]不希望针深入，只是按压脉道以等候经气到来，刺治脉管中的邪气，使其单独排出。
[5]如果深按陷入到肌肉层，虽然邪风可以排出，但肌肉的正气必定会受到损伤。
The Chan needle (Chan Zhen, sharp-pointed needle) is the arrowhead needle used today. It primarily punctures the skin to treat conditions where pathogenic factors invade and cause abnormal tissue growth (abnormal flesh). One must not insert it deeply to avoid draining Yang Qi, thereby allowing pathogenic and healthy factors to coexist peacefully and ensuring the balance of Ying (Nutritive) and Wei (Defensive) Qi.
[Note] Diagram 1: Style of the Chan Needle
[1] The Classic states: The Chan needle is modeled after the cloth needle. The tip is removed by one cun and five fen, leaving a sharp length of one cun and six fen.
[2] "Chan" means sharp; "Zu" (here read as 'cui' or referring to the end) means the tail/end.
[3] This indicates that the needle is one cun and six fen long in total, with the upper part having one cun and five fen removed from the end, leaving only one cun of sharp point at the bottom.
This design aims for shallow insertion without deep penetration.
[4] The Chan needle is the arrowhead needle used today, primarily treating conditions where pathogenic heat invades the skin of the head and body.
[5] Do not insert it deeply; deep insertion will injure Yang Qi.
[6] Therefore, it must be inserted very superficially, expelling the pathogen while preserving healthy Qi. When Ying and Wei Qi are harmonized, the disease is cured.
The Yuan needle (Yuan Zhen, round needle) is modeled after the wool-carding needle. It primarily treats conditions where pathogenic factors invade the intermuscular spaces (fen rou). Its cylindrical body and ovoid tip ensure that healthy Qi is not injured, facilitating the guidance and resolution of pathogenic factors within the muscles.
[Note] Diagram 2: Style of the Yuan Needle
[1] The Classic states: The Yuan needle is modeled after the wool-carding needle. Its body is cylindrical (tong), and its tip is ovoid (yuan), with a total length of one cun and six fen.
[2] "Cylindrical body and ovoid tip" means the body is straight like a bamboo tube, and the tip is rounded like an egg but slightly sharp.
[3] The Yuan needle is essentially the wool-carding needle, treating pathogenic factors located between the muscle layers. Due to its cylindrical body and ovoid tip, it facilitates the drainage of pathogens in the intermuscular spaces,
allowing pathogenic factors to move and exit without injuring the healthy Qi of the muscles.
The Di needle (Di Zhen, blunt needle) has a tip as fine as millet grains. One fears it may penetrate too deeply and injure the muscles. By pressing on the pulse without sinking the needle, one induces Qi arrival; needling causes the pathogenic factor in the vessels to exit alone.
[Note] Diagram 3: Style of the Di Needle
[1] The Classic states: The Di needle is modeled after the sharpness of millet grains, with a total length of three cun and half a cun.
[2] "Sharpness of millet grains" refers to a tip that is round and slightly pointed, suitable for tonification methods.
[3] The tip of the Di needle resembles that of millet grains, primarily treating conditions where pathogenic factors reside within the vessels.
[4] Deep insertion is avoided; instead, the vessel is pressed to await the arrival of Qi. Needling targets the pathogenic factor in the vessel, causing it to exit exclusively.
[5] If pressed deeply into the muscle layer, although wind-pathogens may exit, the healthy Qi of the muscles will inevitably be injured.