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
嘉靖末年，我的朋友沈承之先生，拿着一本书给我看，说：“这是我撰写的《经脉分野》，您精通医学，希望为我校订并写序。”我推辞说不会。沈君再三恳求，往来不停，我才答应说：“好吧。”当时我正在注释《礼记》，没有精力回应。后来沈君参加科举考试，与士子们一起前往京城居住了一年多，最终没有遇到机遇而返回，心中抑郁不得志，于是生病去世。过了很久，《礼记》的注释完成，我才接受这本书并将其读完。这本书从头顶到脚趾，条理分析分明，完全依据《内经》及各位大家的学说，同时偶尔加入自己的见解，可以说是博学治学，被君子称为名家了。可惜他引用的证据繁杂，补充增益过多，那么他委托我校订纠正的心意，确实不是虚言啊。从前吴国季札在徐君的墓前挂剑，说：“我心里已经许诺给他了，何况是口头答应过的呢？”我私下认为先父早年学习这门学问，透彻探究其主旨大意，我不才未能继承，改而从儒，幸好晚年有所成就，还赶得上先父在世，早晚经过庭院时，父亲常常口授《内经》各家关于经络的论述，认为邪气侵犯各条经脉，痰疾就会发生。所谓脉，不仅仅指寸、关、尺三部，大概脉在人体中，有经、有络、有筋。而经有常经和奇经，络有大络和小络。又各有直行、分支、正脉、别脉，有正别脉，诸阴的别脉，都称为正脉。而筋也有直行、分支、别支，其传注的部位，称为端、俞、上、下、内、外、前、后、中、间、侧、交、会；传注的名称，称为上、下、出、入、径、直、横、邪、起、从、及、循、历、注、行、走、之、去、乘、过、还、络、绕、系、属、结、合、交、贯、布、散、至、抵、并、挟、别、约、究、兼，用来辨别表里，区分虚实，明了营卫，推测传变，辨别补泻，审视汗法下法，决断死生，都在这里取法。那些寸、关、尺部位，只是用来诊察而已。针刺、砭石、艾灸，固然以此为关键，而汤剂丸散也必须借助于此。如果不先探寻经络，就茫然施治，怎么能击中要害，而收到万全的功效呢？我的说法大概与沈君相合，本来就知道这门学问深奥微妙，只有精心钻研的人才能契合。于是趁着稍微空闲的时候为它删减校对，再次阐述枢要，以续接这部书稿，改名为《经络全书》，一来酬谢沈君托付的心意，二来继承先父不传的学术脉络，三来帮助后学搜罗括尽勤奋学习。虽然偶尔与沈君的观点有异同，但总归不失为忠诚之士！死者如果还能复活，我将向他质询验证。
万历四年丙子五月十五日，吴江徐师曾作序
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.