手足三阳三阴，表里引经，循摄气上、气下。
答曰∶手法者在手，心传口授秘法。
太阳经 足膀胱，手小肠，上下循，下后补。
少阳经 足胆，手三焦，上下循，下后补刮。
少阴经 足肾，手心，下后刮战。
厥阴经 足肝，手包络，上下循，下后补。
阳明经 足胃，手大肠，上先提循，下后泻。
太阴经 足脾，手肺，上补，下后循提。
天有阴阳，风寒暑湿燥火，三阴三阳下应之。温凉寒热，四时气候温凉是也。温热者，
天之阳也；寒凉者，天之阴也。此乃天之阴阳也。地有阴阳，金木水火土，生长化收藏下应之。
辛甘酸苦咸，五味是也。辛甘淡也，地之阳也；咸酸苦者，地之阴也。此乃地之阴阳也。阴
中有阳，平旦至日中，天之阳也，阳中之阳也。阳中有阴，日中至黄昏，天之阴，阴中之阴
人身之阴阳，故人亦应之。人身之阴阳，外为阳，内为阴；背为阳，腹为阴；脏为阴，
腑为阳。心、肝、脾、肺、肾五脏为阴，胆与胃、大肠、小肠、膀胱、三焦六腑为阳。
所以知阴中之阴，阳中之阳也。阴阳者，何也?如冬病在阴，夏病在阳，春病在阴，秋
病在阳，知其所则施针，循、气上、气下也。背为阳，阳中之阳，心也；背为阳，阳
中之阴，肺也。腹为阴，阴中之阳，肝也；腹为阴，阴中之阴，脾也。
手足三阳经与三阴经，存在表里相引的经脉关系，其气机运行有向上和向下的区别。
回答说：针刺手法的关键在于手部操作，这是需要用心领悟、口头传授的秘法。
太阳经包括足太阳膀胱经和手太阳小肠经，上下循行，下行后采用补法。
少阳经包括足少阳胆经和手少阳三焦经，上下循行，下行后采用补法和刮法。
少阴经包括足少阴肾经和手少阴心经，下行后采用刮法和震颤法。
厥阴经包括足厥阴肝经和手厥阴心包经，上下循行，下行后采用补法。
阳明经包括足阳明胃经和手阳明大肠经，上行先提引循行，下行后采用泻法。
太阴经包括足太阴脾经和手太阴肺经，上行采用补法，下行后循行并提引。
天有阴阳之分，对应风、寒、暑、湿、燥、火六气，三阴三阳在人体下部与之相应。温、凉、寒、热是四季气候变化的体现。温热属于天之阳；寒凉属于天之阴。这就是天的阴阳属性。地也有阴阳之分，对应金、木、水、火、土五行，生长化收藏的过程在下方与之相应。辛、甘、酸、苦、咸五味即是如此。辛、甘、淡味属于地之阳；咸、酸、苦味属于地之阴。这就是地的阴阳属性。阴中有阳，从黎明到中午，属于天之阳，也是阳中之阳。阳中有阴，从中午到黄昏，属于天之阴，也是阴中之阴。人身之阴阳，因此人也顺应这种规律。人身之阴阳，外部为阳，内部为阴；背部为阳，腹部为阴；脏为阴，腑为阳。心、肝、脾、肺、肾五脏属阴，胆、胃、大肠、小肠、膀胱、三焦六腑属阳。所以能分辨出阴中之阴和阳中之阳。阴阳是什么？比如冬天病在阴，夏天病在阳，春天病在阴，秋天病在阳，了解这些规律后施针，运用循经、气上、气下等手法。背部为阳，阳中之阳是心；背部为阳，阳中之阴是肺。腹部为阴，阴中之阳是肝；腹部为阴，阴中之阴是脾。
The three Yang meridians and three Yin meridians of the hands and feet have exterior-interior connecting relationships, with their Qi movements differing in ascending and descending directions.
Answer: The manipulation technique lies in the hands; it is a secret method that must be transmitted orally and understood through heart-to-heart teaching.
Taiyang Meridian (Greater Yang Meridian): Foot Bladder Meridian of Foot-Taiyang and Hand Small Intestine Meridian of Hand-Taiyang. They circulate up and down; after descending, tonification (Bu) is applied.
Shaoyang Meridian (Lesser Yang Meridian): Foot Gallbladder Meridian of Foot-Shaoyang and Hand Sanjiao Meridian of Hand-Shaoyang. They circulate up and down; after descending, tonification (Bu) and scraping (Gua) are applied.
Shaoyin Meridian (Lesser Yin Meridian): Foot Kidney Meridian of Foot-Shaoyin and Hand Heart Meridian of Hand-Shaoyin. After descending, scraping (Gua) and trembling/shaking (Zhan) are applied.
Jueyin Meridian (Terminal Yin Meridian): Foot Liver Meridian of Foot-Jueyin and Hand Pericardium Meridian of Hand-Jueyin. They circulate up and down; after descending, tonification (Bu) is applied.
Yangming Meridian (Yang Brightness Meridian): Foot Stomach Meridian of Foot-Yangming and Hand Large Intestine Meridian of Hand-Yangming. Ascending involves first lifting and circulating; descending involves purgation/draining (Xie).
Taiyin Meridian (Greater Yin Meridian): Foot Spleen Meridian of Foot-Taiyin and Hand Lung Meridian of Hand-Taiyin. Ascending involves tonification (Bu); descending involves circulating and lifting afterward.
Heaven possesses Yin and Yang, corresponding to the Wind, Cold, Summer-heat, Dampness, Dryness, and Fire (Six Qi). The Three Yin and Three Yang correspond to these below. Warmth, coolness, cold, and heat are the manifestations of seasonal climatic changes. Warm and hot belong to Heaven’s Yang; cold and cool belong to Heaven’s Yin. This is the Yin and Yang of Heaven. Earth also possesses Yin and Yang, corresponding to Metal, Wood, Water, Fire, and Earth (Five Elements). The processes of growth, transformation, and storage correspond to these below. Pungent, Sweet, Sour, Bitter, and Salty (Five Flavors) are examples. Pungent, Sweet, and Bland flavors belong to Earth’s Yang; Salty, Sour, and Bitter flavors belong to Earth’s Yin. This is the Yin and Yang of Earth. Within Yin there is Yang: from dawn to noon, it is Heaven’s Yang, which is Yang within Yang. Within Yang there is Yin: from noon to dusk, it is Heaven’s Yin, which is Yin within Yin. Human body’s Yin and Yang thus respond to this pattern. In the human body, the exterior is Yang, the interior is Yin; the back is Yang, the abdomen is Yin; Zang organs are Yin, Fu organs are Yang. The Five Zang organs—Heart, Liver, Spleen, Lung, Kidney—are Yin. The Six Fu organs—Gallbladder, Stomach, Large Intestine, Small Intestine, Bladder, Sanjiao—are Yang. Thus, one can distinguish Yin within Yin and Yang within Yang. What are Yin and Yang? For instance, winter diseases reside in Yin, summer diseases in Yang, spring diseases in Yin, and autumn diseases in Yang. Understanding these patterns allows for acupuncture application, utilizing techniques such as meridian circulation, guiding Qi upward, and guiding Qi downward. The back is Yang; among Yang, the Heart is Yang within Yang. The back is Yang; among Yang, the Lung is Yin within Yang. The abdomen is Yin; among Yin, the Liver is Yang within Yin. The abdomen is Yin; among Yin, the Spleen is Yin within Yin.