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I have always held that if Heaven and Earth lacked *Mai* (Pulse/Veins), the water-winding mechanism would not turn; if Mountains and Rivers lacked *Mai*, spiritual elegance would not gather; if Grasses and Trees lacked *Mai*, their verdant lushness would not unfold.
All that enables life to generate and sustain itself relies solely on the circuitous operation and movement of *Mai*. Thus, it is known that the human body is a microcosm. The form is conceived first, and completion occurs later. When the form is established, *Qi* (Vital Energy) circulates; when *Qi* circulates, the pulse becomes visible. Therefore, it is confirmed that humans are born through *Mai*.
Nowadays, those who wish to regulate life do not fail to thoroughly understand the origins and details of the pulse, in order to observe the deficiency and excess of Yin and Yang, distinguish the cold and heat of the Zang-Fu Organs (Viscera and Bowels), and determine auspiciousness or peril within a single breath. However, Zi Xu previously elucidated profound principles in the *Four-Character Summary* (Si Yan Ju Yao), yet his coverage was not comprehensive. My teacher has now expanded upon this, delving deep and reaching far, deriving syndromes from pulses, and prescribing formulas based on syndromes. His analysis leaves no meaning unclarified and offers many unique interpretations; even Guo Xiang’s commentary on the *Zhuangzi* or Zhang Zhan’s commentary on the *Laozi* cannot surpass it.
Upon completion, the book was titled *Yi Deng Xu Yan* (Continuation of the Medical Lamp's Flame).
It is like gathering rare treasures from five capitals and nine markets in a dark room; without the light of Taiyi’s candelabra, one could not distinguish the precious and strange items. This collection is indeed the passing down of the torch from Zi Xu and a guide for future students. As the saying goes, once a lamp is lit, the darkness of thousands of generations is dispelled. I have followed my master for many years, navigating through wind, rain, clarity, and obscurity, thereby benefiting from the illumination of Li Ming (the Sun/Light).
Now that the manuscript is finished and proofread by myself and my disciples, I append these words at the end. From this, we can see that the means to prolong the life of the world and endure for ten thousand generations lies precisely here; is this merely a small supplement?
On the Buddha’s Bathing Day in the Renchen year, Jiang Shijin, disciple from the East Gate of Yong [Ning], bows respectfully to write this postscript and calligraphy.