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The seventy-fourth difficulty of the *Nan Jing* states: Follow the starting direction and calculate its numerical sequence. The superficial manifestations are on the exterior, with the five transformations overlapping and stacking. (Supplementary notes) The so-called Tianyuan method is called "five transformations overlapping and stacking." One must start from the initial direction and rely on numerical calculation. The initial direction is Yin (Spring), which corresponds to the Liver in the human body. This proceeds from the East, following the celestial wheel's rotation to the location where the disease manifests. Calculate how many numerical steps are taken from the start, then reverse-count back from the affected side until reaching a point equal to the previous count. Then, at the acupoint on the original diseased side, drain the qi from the pathway of the stopping direction's acupoint. Do not mistakenly perform draining methods within the meridian of the affected side.

For example, if a patient has disorders regarding smell and odor, the Heart governs the five odors, which enter the Spleen as fragrant and foul smells. Counting from the East to the governed location, the organ governing the five odors is the Heart. The number for East is 1, and for South is 2, totaling 2. Then, one should reverse-count from the affected side. The Spleen corresponds to 1, and the Heart to 2, summing to 2. Thus, the count reaches the Heart. The Heart belongs to Ying-Fire (Nutritive Fire). Therefore, one should drain Ying-Fire within the affected side. This constitutes draining fire in the Spleen Meridian. Someone might ask why we count backwards? The answer is that Qi emerges from the Earth and is carried by the Heavenly Wheel, moving rightward toward Heaven; it should not be treated at the apparent void or deficiency. This is analogous to the meaning that when the boat moves, the shore appears to shift.

The sixty-eighth difficulty states: The primary symptoms and pulse correspond, generating five images again. The superficial images respond to observation and listening. (And five methods each for the Liver and Gallbladder) See the preceding diagram. The principles of the Renyuan method (the preceding diagram already records seven images and seven methods, see the previous Renyuan examples after) See the preceding diagram.

The Foot-Taiyang Bladder Meridian originates at Zhiyin (BL67), on the lateral side of the little toe, about the width of a leek leaf away from the nail corner, serving as the Jing-Well metal point. It is located at the tip of the foot little toe (ten breaths).
The Foot-Shaoyin Kidney Meridian originates at Yongquan (KI1), in the center of the sole. It begins below the little toe and slants forward (three breaths).
The Hand-Jueyin Pericardium Meridian: Its straight branch follows the middle finger to its tip, into the depression about the width of a leek leaf away from the nail, forming the Jing-Well point, Zhongchong (PC9). Its branch separates from the palm and follows the ring finger to its tip.
The Hand-Sanjiao Triple Energizer Meridian originates at the tip of the ring finger, about the width of a leek leaf away from the nail, forming the Jing-Well point (three breaths).
The Foot-Shaoyang Gallbladder Meridian originates at Qiaoyin (GB44), at the tip of the ring finger, about the width of a leek leaf away from the nail, forming the Jing-Well point. Its branch ascends into the space between the bones of the big toe, exits the tip, passes through the nail, and emerges among the hair (three breaths, twenty breaths total).
The Foot-Jueyin Liver Meridian originates at the tip of the big toe, entering the area where hairs gather, about the width of a leek leaf away from the nail, forming the Jing-Well point, Dazhun (LR14). It is also among the hair (ten breaths, six breaths).
The Hand-Taiyin Lung Meridian originates at the tip of the thumb, exiting Shaoshang (LU11) on the medial side of the thumb, about the width of a leek leaf away from the nail corner, forming the Jing-Well point. Its branch exits the medial side of the index finger to its tip. The Hand-Yangming Large Intestine Meridian originates at the tip of the index finger, entering the medial side of the index finger, about the width of a leek leaf away from the nail corner, forming the Jing-Well point (one breath). It intersects at the medial side of the middle finger (three breaths).
The Foot-Yangming Stomach Meridian originates at the tip of the second toe, about the width of a leek leaf away from the nail, forming the Jing-Well point. Its branch exits between the toes to the tip (one breath).
The Foot-Taiyin Spleen Meridian originates at the tip of the foot big toe, following the medial side of the toe, about the width of a leek leaf away from the nail corner, forming the Jing-Well point, Yinbai (SP1) (ten breaths).
The Hand-Shaoyin Heart Meridian originates at the medial tip of the little finger, following the medial end of the finger, about the width of a leek leaf away from the nail corner, forming the Jing-Well point (three breaths).
The Hand-Taiyang Small Intestine Meridian originates at the tip of the little finger, following the end of the finger, into the depression one fen away from the nail, forming the Jing-Well point (five breaths).