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The Cun Kou (Cun Kou, pulse point at the wrist) is the great assembly of pulses, where practitioners diagnose auspiciousness, inauspiciousness, life, and death. Occasionally, the pulse does not travel through the Cun Kou, but instead obliquely enters the lateral aspect of the arm from Lieque (LU 7), a point of the Lung Meridian, enters Yangxi (LI 4), a point of the Large Intestine Meridian, and ascends to the index finger. This type of pulse is named "Fan Guan" (Reverse Gate Pulse). It is not an extremely rare or non-existent pulse. Humans are microcosms; why not observe the heavens? The sun's movement constitutes the great longitude of the heavens, while the Seven Governors (Seven Governors: Sun, Moon, and five planets) constitute the latitude (The Twenty-Eight Mansions rotate leftward as longitude; the Seven Governors rotate rightward as latitude). They circulate in the sky, sometimes appearing slow, stationary, hidden, or retrograde, and occasionally undergoing encroachment or eclipse (When the five planets align with the sun in a trine configuration, they appear slow; when opposite the sun or separated by one sign, they appear stationary; when conjunct with the sun, they are hidden; retrograde motion also occurs during opposition or separation by one sign. Any star deviating from its normal path and entering another mansion is called encroachment. Eclipse refers to solar and lunar eclipses). Gan De and Shi Shen (Ancient officials in charge of astronomy, similar to Fengxiang and Baozhang in the *Rites of Zhou*) could deduce these phenomena. As for celestial retributions that should manifest due to faults, yet show no signs of erosion (The *Book of Rites* states: "If yang teachings are neglected, retribution appears in heaven as a solar eclipse; if yin teachings are neglected, retribution appears in heaven as a lunar eclipse." Erosion refers to mutual encroachment. Although numerologically expected, such events may not occur; perhaps other virtuous acts have mitigated minor punishments, or there is a mechanism for repentance awaiting swift correction. This is merely a coincidental alignment of circumstances); official institutions were established to verify discrepancies in stellar movements (The *Rites of Zhou* describes officials managing ten methods of observing celestial luminaries to discern omens and judge fortune and misfortune. If yin and yang transform abnormally, such as the formation of a red crow, carving and horizontal stabbing, monitoring and embracing halos, obscuration causing daytime darkness, dimming and light confusion, white rainbows piercing across, cloud gases arranging in sequence, morning mist rising above the sun, miscellaneous gases can be imagined. The *Monthly Ordinances* state that stellar movements do not tolerate error; 'Su' refers to stellar trajectories, 'Li' refers to stars passing their mansions; 'Dai' is synonymous with 'Te'. Officials were set up thus, and celestial phenomena manifested thus, which is merely a fortuitous convergence of circumstances). Furthermore, Jing Xing (Jing Star: Virtue Star, appearing in peaceful times), Ke Xing (Guest Star:无常 stars without fixed positions; e.g., Yan Ziling resting his foot on Emperor Guangwu's abdomen, reported next day as Guest Star encroaching upon the Imperial Seat), Bei Xing (Bei Star: Ominous Star; e.g., *Spring and Autumn Annals* records Bei Star entering Da Chen in the 17th year of Duke Zhao), and Hui Xing (Hui Star: Comets; *Erya* calls it Qiangqiang, also referred to as Bei; Wen Ying's annotation in *Book of Han* distinguishes them: Bei Star has short rays radiating outward,蓬蓬 (vigorous); Hui Star has long rays like a broom sweeping. These two stars seem slightly different). Auspicious and inauspicious signs appear in due time, representing natural occurrences of circumstances. Although Gan De and Shi Shen thoroughly understood these subtleties, they ultimately could not mend the gaps. Consider the earth as well. The east is the great assembly of waters; Yu directed the Ru and Han rivers, drained the Huai and Si rivers, guided them according to their nature, and dredged them where they were blocked. Yu acted as if doing nothing (following nature naturally). However, the Weak Water flowing into the Flowing Sands becomes the beginning of water guidance; the Black Water flowing into the South Sea actually precedes the eastern flow. Even Yu could not force it to flow east. As long as peace and calm waves are achieved, there is no need to insist it must return to the east. Humans are born from the qi of heaven and earth; pulses assembling at Cun Kou reflect the orthodox qi of heaven and earth; pulses reversing outside the Guan (Gate) reflect the biased qi of heaven and earth. However, bias is not disease; both are born from receiving qi. Their three-position localization is no different at Cun Kou.