左手关前一分为人迎，右手关前一分为气口。《脉经》
曰∶“人迎紧盛伤于风寒，气口紧盛伤于饮食。”夫前一分，即左右寸也。左寸本以候心，心非受风寒之所，
而以为紧盛伤于风寒；右寸本以候肺，肺非积饮食之区，而以为紧盛伤于饮食。辗转思维，不得其解。乃今于
天地营运而知之矣。天左旋，风寒为天之邪，人迎之而病，邪氛胁逼，畏风恶寒，亦见于左之上部；地无旋，
地之气右旋，人身之气亦从右始，是以右之上部不名寸口而名气口。一部各分天、地、人三候，上部之地属阳
明胃经，主消纳五谷，内伤饮食亦先见于右之上部。以其本位而言，则曰心与肺；以其受邪而言，则曰人迎气
口。
人之两手为见脉之所，而不知两足尤为树脉之根。冲阳动脉在足 上五寸陷中，属阳明胃经；太冲动脉
在足大指本节后三寸陷中，属厥阴肝经；太溪动脉在足踝后跟骨间，属少阴肾经。病当危殆，寸、关、尺三部
俱无，须向三脉诊之。如往来息均，尚有可生之路。试观小儿二、三岁时，好赤足，八岁好趋，十岁好走，阳
气从下而生也；五十足渐畏冷，六十步履维艰，阳气从下而耗也。两足无脉，纵两手无恙，其命不能久留；两
手无脉，而两足有脉，调治得宜，亦可挽转生机。一心应变，宏敷济众之仁；万象回春，允副好生之德。
左手关脉前方一分处为人迎脉，右手关脉前方一分处为气口脉。《脉经》中说：“人迎脉紧盛表示受风寒邪气侵袭，气口脉紧盛表示因饮食不节而受伤。”这前方一分的位置，就是左右手的寸部。左寸本应诊察心脏，但心脏并非容易受到风寒邪气的部位，却将此处紧盛解释为伤于风寒；右寸本应诊察肺脏，但肺脏并非积存饮食的部位，却将此处紧盛解释为伤于饮食。反复思考，无法理解其道理。如今通过天地运行的规律来理解了。天体向左旋转，风寒属于天的邪气，人迎脉感应到邪气而发病，邪气氛围胁迫逼迫，出现怕风、恶寒的症状，也表现在左侧的上部；大地静止不转，地气向右旋转，人身之气也从右边开始生发，因此右侧的上部不叫寸口而叫气口。每一部各分为天、地、人三候，上部之地归属于阳明胃经，主管消化五谷，内伤饮食的症状也首先表现在右侧的上部。从其原本所属的脏腑位置来说，则是心与肺；从其感受邪气的角度而言，则称为人迎和气口。
人的两手是诊察脉搏的地方，却不知道两足更是确立脉象的根本。冲阳动脉位于足背上方五寸的凹陷中，归属于阳明胃经；太冲动脉位于足大趾本节后方三寸的凹陷中，归属于厥阴肝经；太溪动脉位于足踝后方跟骨之间，归属于少阴肾经。当病情危重时，寸、关、尺三部都摸不到脉搏，必须向这三条脉进行诊察。如果脉搏往来均匀，还有可生的希望。试看小儿在两、三岁时，喜欢赤脚，八岁时喜欢奔跑，十岁时喜欢快走，这是因为阳气从下部产生；到了五十岁逐渐害怕寒冷，六十岁时步履艰难，这是因为阳气从下部消耗。两足没有脉搏，即使两手正常，生命也不能长久维持；两手没有脉搏，而两足有脉搏，如果调理治疗得当，也可以挽回生机。一心应对变化，广泛宣扬救济众人的仁爱之心；万象复苏如春，确实符合爱惜生命的德行。
The position one *fen* anterior to the Guan pulse on the left hand is called Renying (Human Welcome), and the position one *fen* anterior to the Guan pulse on the right hand is called Qikou (Qi Mouth). The *Mai Jing* (Classic of Pulse Diagnosis) states: "A tight and full Renying pulse indicates injury from wind-cold; a tight and full Qikou pulse indicates injury from dietary indiscretion." This anterior one *fen* position corresponds to the Cun (Inch) positions of both hands. The left Cun originally serves to inspect the Heart, yet the Heart is not the primary site for wind-cold invasion, yet a tight and full pulse here is interpreted as injury from wind-cold; the right Cun originally serves to inspect the Lung, yet the Lung is not the storage area for food, yet a tight and full pulse here is interpreted as injury from diet. After repeated contemplation, I could not find an explanation. Now, through understanding the operation of heaven and earth, I comprehend it. Heaven rotates to the left; wind-cold is the pathogen of heaven. When Renying encounters this pathogen and disease arises, the oppressive aura of the pathogen causes aversion to wind and cold, which also manifests in the upper part of the left side. Earth does not rotate; the Qi of earth rotates to the right, and the Qi of the human body also begins from the right. Therefore, the upper part of the right side is not named Cun Kou (Cun Mouth) but Qikou. Each section is divided into three levels: Heaven, Earth, and Human. The Earth level of the upper section belongs to the Yangming Stomach Meridian, which governs the digestion and assimilation of the five grains; thus, internal injury from diet first manifests in the upper part of the right side. From the perspective of its original anatomical location, it refers to the Heart and Lung; from the perspective of pathogen reception, it is referred to as Renying and Qikou.
The two hands of a person are the sites where pulses are felt, but one should not know that the two feet are even more the root for establishing pulse diagnosis. The Chongyang artery is located in the depression five *cun* above the dorsum of the foot, belonging to the Yangming Stomach Meridian; the Taichong artery is located in the depression three *cun* posterior to the proximal interphalangeal joint of the great toe, belonging to the Jueyin Liver Meridian; the Taixi artery is located between the calcaneus behind the malleolus, belonging to the Shaoyin Kidney Meridian. When a disease is critical and the Cun, Guan, and Chi positions of the wrist are undetectable, one must examine these three arteries. If the pulse comes and goes evenly, there is still a path to survival. Observe children aged two or three who prefer walking barefoot, those aged eight who prefer running, and those aged ten who prefer walking fast; this is because Yang Qi generates from below. By age fifty, one gradually fears cold; by age sixty, walking becomes difficult; this is because Yang Qi is consumed from below. If there is no pulse in the two feet, even if the two hands are normal, life cannot be sustained long; if there is no pulse in the two hands but there is a pulse in the two feet, with appropriate regulation and treatment, vital energy can still be restored. With a mind ready to adapt to changes, widely disseminate the benevolence of saving the masses; as all phenomena return to spring, truly embodying the virtue of cherishing life.