如少阴在左，当左不应而反见于右，阳脉本在右，而移于左，是少阴所易之位，非少阳则太阳脉也，故曰
交，交者死。反者，如其年少阴在尺，当尺不应而反见于寸，阳本在寸而移于尺，故曰尺寸反，反者死。然
必阴阳俱交，始为交也，尺寸俱反，始为反也，若但本位当应不应，乃阴阳之不应也，疾而已，
不在交反之例。
\r掌图\pt28a4.bmp\r
其法以南政子年起中指端，北政子年起中指根，俱逆行轮之。凡年辰所值之处，即其不应之位。如南政
子年起中指端，即两寸不应，丑年左寸，寅年左尺，右数到底，皆南政不应之位。北政子年起中指根，如前从
右数到底，皆北政不应之位也。
天符为执法，犹相辅。岁会为行令，为方伯。太一天符为贵人，犹君主。
天符者，司天与中运同气也，中其邪者，其疾速而危，以其权重也。岁会者，中运与岁支同气也，惟寅申
巳亥年不在例，中
邪者，其病徐而持。同天符、同岁会者，中运与在泉同气也，但阳年为同天符，阴年为同岁会，天会、岁会、
运会谓之三合也。太乙天符者，中运与司天、岁支三者皆同气也，谓之贵人，中其邪，则病暴死。戊午、己丑、
己未、乙酉四年，太乙常以冬至之日居坎宫四十六日，立春居艮，春分居震，各宫挨节四十六日，惟巽干二宫
止四十五日，至干而复反于坎，如是不已，终而复始。
如果少阴脉出现在左侧，本应在左侧却不应现反而出现在右侧；阳脉本来在右侧，却移动到了左侧，这是少阴所交换的位置，不是少阳就是太阳的脉象，所以称为“交”，出现“交”的情况预后不良，主死。所谓“反”，是指如年少阴脉本应在尺部，尺部本不应现反而出现在寸部；阳脉本来在寸部却移动到了尺部，所以称为“尺寸反”，出现“尺寸反”的情况主死。但是必须阴阳两部都出现“交”的现象，才称为“交”；寸部和尺部都出现“反”的现象，才称为“反”。如果只是本应出现的脉位没有出现，那是阴阳之气不相呼应，病情较轻，属于疾病范畴，不属于“交”和“反”的危重情况。
掌图法：南政之年从子年开始，以中指指尖为起点；北政之年从子年开始，以中指指根为起点，均逆时针方向推算轮转。凡是年辰所对应的部位，就是该处脉象不应现的位置。例如南政子年从指尖开始，则两寸脉不应现；丑年左寸脉不应现；寅年左尺脉不应现，依此类推直到尽头，都是南政之年脉象不应现的位置。北政子年从指根开始，同样从右向左数到尽头，都是北政之年脉象不应现的位置。
天符相当于执法官，如同辅佐大臣。岁会相当于执行命令者，如同地方长官（方伯）。太一天符相当于贵人，如同君主。
所谓天符，是指司天之气与中运之气五行属性相同的人，感受这种邪气，发病迅速且危险，因为其权势重大。所谓岁会，是指中运之气与岁支（地支）五行属性相同，只有寅、申、巳、亥四年不在此例，感受这种邪气，病情发展缓慢且持久。同天符、同岁会，是指中运之气与在泉之气五行属性相同，但阳年为同天符，阴年为同岁会，天会、岁会、运会合称为“三合”。太乙天符，是指中运、司天、岁支三者五行属性皆相同，称为贵人，感受这种邪气，则发病暴烈，可致突然死亡。戊午、己丑、己未、乙酉这四年，太乙常于冬至日居于坎宫四十六天，立春时居于艮宫，春分时居于震宫，各宫按节气各占四十六天，唯独巽宫和乾宫只占四十五天，到达乾宫后又返回坎宫，如此循环不已，终而复始。
If the Shaoyin (Lesser Yin) pulse appears on the left, it should not be present there but instead appears on the right; the Yang pulses originally reside on the right but shift to the left. This represents the position exchanged by Shaoyin, which is neither the Shaoyang (Lesser Yang) nor the Taiyang (Greater Yang) pulse. Therefore, it is termed "Jiao" (Crossing/Intersecting), and the presence of Jiao indicates death. The term "Fan" (Reversal) refers to a situation where, in a young patient, the Shaoyin pulse should normally be found at the Chi (Cun) position but instead appears at the Cun (Inch) position; the Yang pulse, originally at the Cun, shifts to the Chi. Thus, it is called "Cun-Chi Fan" (Reversal of Inch and Cubit positions), and the presence of Cun-Chi Fan indicates death. However, it must be that both Yin and Yang aspects exhibit "Jiao" to constitute Jiao, and both Cun and Chi positions exhibit "Fan" to constitute Fan. If only the expected pulse at its proper position is absent, this is merely an absence of Yin-Yang correspondence, indicating a minor illness, and does not fall under the category of Jiao or Fan.
[Palmar Diagram]
The method involves starting from the tip of the middle finger for Nan Zheng (Southern Sovereign) years beginning with Zi, and from the base of the middle finger for Bei Zheng (Northern Sovereign) years beginning with Zi, rotating counter-clockwise. The location corresponding to the year's value is the position where the pulse should not be felt. For example, in Nan Zheng Zi years starting from the fingertip, both Cun positions should not be felt; in Chou years, the left Cun should not be felt; in Yin years, the left Chi should not be felt. Counting from the right to the end, these are all positions where the pulse should not be felt in Nan Zheng years. Similarly, for Bei Zheng Zi years starting from the finger base, counting from right to left to the end, these are all positions where the pulse should not be felt in Bei Zheng years.
Tian Fu (Heavenly Harmony) acts as the law enforcer, akin to an assisting minister. Sui Hui (Annual Harmony) acts as the executor of orders, akin to a regional governor. Tai Yi Tian Fu (Supreme One Heavenly Harmony) acts as a noble person, akin to a monarch.
Tian Fu occurs when the Si Tian (Sovereign Heaven) Qi and the Zhong Yun (Central Movement) Qi share the same elemental nature. Those afflicted by this pathogen suffer rapid and critical illness due to its heavy weight/influence. Sui Hui occurs when the Zhong Yun Qi and the Sui Zhi (Year Branch) Qi share the same elemental nature, except for the years of Yin, Shen, Si, and Hai. Those afflicted by this pathogen suffer slow-progression and persistent illness. Tong Tian Fu (Same Heavenly Harmony) and Tong Sui Hui (Same Annual Harmony) occur when the Zhong Yun Qi and the Zai Quan (Inquiring Spring) Qi share the same elemental nature. Yang years are designated Tong Tian Fu, while Yin years are designated Tong Sui Hui. Tian Hui, Sui Hui, and Yun Hui are collectively referred to as the "Three Harmonies." Tai Yi Tian Fu occurs when the Zhong Yun, Si Tian, and Sui Zhi all share the same elemental nature, termed the Noble Person. Affliction by this pathogen leads to sudden death. In the years of Wu Wu, Ji Chou, Ji Wei, and Yi You, Tai Yi resides in the Kan Palace for 46 days starting from the Winter Solstice, moves to Gen Palace at Start of Spring, to Zhen Palace at Spring Equinox, staying 46 days in each palace according to solar terms. Only the Xun Palace and Qian Palace have 45 days. Upon reaching Qian Palace, it returns to Kan Palace, continuing this cycle endlessly, ending and beginning anew.