嘉靖末年，余友沈君承之，手一编见示曰∶“此，予所述《经脉分野》也，子深于医者，幸为我订而序
之。”予谢不能。沈君祈请再三，往复不置，乃应曰∶诺。予时方注《礼记》，未有以应也。而沈君从计，偕
士之京师居岁余，竟无所遇而还，郁郁不得志，遂病以死。久之，《礼》注脱稿，乃受书而卒业焉。其书自巅
放趾，条析分明，一本《内经》及诸大家之说，而时参以己见，可谓博治，君子称名家矣。惜其引证繁复，补
益太过，则其见托订正之意，良非虚也。昔吴季子挂剑于徐君之墓，曰∶吾已心许之矣，况于口诺者乎？窃惟
先君蚤学斯道，洞究大旨，予不肖弗克，缵承先绪，改而从儒，儒幸晚成，犹及先君之存，旦夕过庭，每口授
《内经》诸家之论，以为邪客诸脉，痰疾乃生。所谓脉者，非独寸关尺之谓也，盖脉之在人身也，有经、有络、
有筋。而经有常奇，络有大小。又各有直、有支、有正、有别，有正别、诸阴之别，皆为正。而筋亦有直、有支、有别，
其传注之所，曰端、曰俞、曰上、曰下、曰内、曰外、曰前、曰后、曰中、曰间、曰侧、曰交、曰会；传注之名，曰上、
曰下、曰出、曰入、曰径、曰直、曰横、曰邪、曰起、曰从、曰及、曰循、曰历、曰注、曰行、曰走、曰之、曰去、曰
乘、曰过、曰还、曰络、曰绕、曰系、曰属、曰结、曰合、曰交、曰贯、曰布、曰散、曰至、曰抵、曰并，曰挟、曰别、
曰约、曰究、曰兼，以别表里，以分虚实，以明营卫，以测传变，以辨补泻，以审汗下，以决死生，皆于是乎取之。彼
寸、关、尺者，特以候之而已。针石灼艾，固以此为要，而汤液丸散亦必藉焉。苟不先寻经络，而茫然施治，乌能
中其肯綮，而收万全之功哉？其说盖与沈君合，固知此道渊微，唯精研者乃相契也。爰乘稍暇为之删校，复述
枢要，以续斯编，更名曰《经络全书》，一以酬沈君见托之意，一以缵先君不传之绪，一以裨后学搜括之勤。
虽间与沈君异同，要不失为忠臣矣！死者如可作也，吾将质之。
万历四年丙子五月望日，吴江徐师曾序
In the late years of the Jiajing reign, my friend, Mr. Shen Chengzhi (Shen Shou), presented a manuscript to me, saying, "This is my work *Jingmai Fenye* (Classification of Meridian Regions). You are deeply versed in medicine; I hope you will proofread it and write a preface for me." I declined, claiming inability. After Shen Jun repeatedly requested and we exchanged letters without ceasing, I finally agreed, saying, "Very well." At that time, I was annotating the *Liji* (Book of Rites) and had no capacity to respond. Later, Shen Jun took the imperial examination, accompanied scholars to the capital, and resided there for over a year. Ultimately, he failed to find opportunity and returned home. Depressed and unfulfilled, he fell ill and died. After a long period, when the annotation of the *Liji* was completed, I received the book and finished reading it. The book traces from the crown to the toes, with clear and distinct analysis. It strictly follows the theories of the *Neijing* (Inner Canon of the Yellow Emperor) and other masters, occasionally incorporating his own insights. This can be considered erudite scholarship, and gentlemen praised him as a renowned master. Alas, his citations were overly complex, and his additions excessive, yet his intention to entrust me with proofreading was indeed sincere. In ancient times, Wu Ji Ziya hung his sword on the tomb of the Marquis of Xu, saying, "I had already promised him in my heart, let alone one who made an oral promise?" I privately reflect that my late father studied this discipline early in life, thoroughly comprehending its main principles. Though I, unworthy, could not inherit them directly, I switched to Confucian studies. Fortunately, achieving success late in life, I still lived while my father was alive. Morning and evening, passing through the courtyard, he would orally impart the discussions of various schools regarding the *Neijing*, stating that when evil pathogens invade the meridians, phlegm-related diseases arise. The term "Mai" (Vessels/Pulse) does not refer solely to the Cun, Guan, and Chi positions. Rather, within the human body, there are Jing (Primary Meridians), Luo (Collaterals), and Jin (Sinews). The Jing includes Chang Jing (Regular Meridians) and Qi Jing (Extraordinary Vessels); the Luo includes Da Luo (Great Collaterals) and Xiao Luo (Minor Collaterals). Each has straight paths, branches, primary vessels, and divergent vessels. The divergent vessels of the Yin channels are all considered primary. The Jin also have straight paths, branches, and divergences. Their transmission points are named Duan (Ends), Shu (Transport Points), Shang (Upper), Xia (Lower), Nei (Internal), Wai (External), Qian (Front), Hou (Back), Zhong (Middle), Jian (Between), Ce (Side), Jiao (Intersection), Hui (Meeting). The verbs describing transmission include: Shang, Xia, Chu (Exit), Ru (Enter), Jing (Direct Path), Zhi (Straight), Heng (Horizontal), Xie (Oblique), Qi (Start), Cong (Follow), Ji (Reach), Xun (Trace), Li (Pass Through), Zhu (Pour into), Xing (Travel), Zou (Run), Zhi (Go to), Qu (Depart), Cheng (Ride/Overcome), Guo (Pass), Huan (Return), Luo (Connect), Rao (Wind around), Xi (Tie), Shu (Attach), Jie (Knot), He (Join), Jiao (Intersect), Guan (Penetrate), Bu (Distribute), San (Scatter), Zhi (Arrive), Di (Reach), Bing (Merge), Xie (Clasp), Bie (Separate), Yue (Bind), Jiu (Investigate), Jian (Combine). These are used to distinguish Exterior and Interior, differentiate Deficiency and Excess, clarify Ying (Nutrient) and Wei (Defensive) Qi, predict disease transmission, identify Tonification and Sedation techniques, assess Sweating and Purging methods, and determine life and death. All these are derived from here. The Cun, Guan, and Chi positions are merely used for pulse diagnosis. Acupuncture, stone therapy, and moxibustion certainly rely on this as essential, and decoctions, pills, and powders must also utilize it. If one does not first explore the Jing-Luo system and treats blindly, how can one hit the critical point and achieve perfect results? My theory essentially aligns with Jun Shen's. I knew that this path is profound and subtle, and only those who study intensively can resonate with it. Therefore, taking advantage of my spare time, I edited and collated the text, summarized the key points, and continued this compilation, renaming it *Jingluo Quan Shu* (Complete Book of Meridians and Collaterals). This was done to repay Jun Shen's trust, to inherit my father's untransmitted legacy, and to assist future students in their diligent research. Although there may be minor differences with Jun Shen's views, I remain loyal to the truth. If the deceased could return to life, I would verify this with him.
On the 15th day of the fifth month in the Bingzi year of the Wanli era (1576), Xu Shizeng of Wujiang wrote the preface.