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Difficulty 65 states: The Classics say, "The point where Qi emerges is the Jing-Well (Jing), and the point where Qi enters is the He-Sea (He)." What is the rationale behind this? The answer is: "The point where Qi emerges is the Jing-Well. 'Jing' corresponds to the East and Spring, which is the time when all things begin to grow; therefore, it is said that 'the point where Qi emerges is the Jing-Well.' The point where Qi enters is the He-Sea. 'He' corresponds to the North and Winter, when Yang Qi enters and stores within the interior; therefore, it is said that 'the point where Qi enters is the He-Sea.'"

Difficulty 66 states: "The Classics state: The Yuan-Source (Yuan) of the Lung meridian emerges from Taiyuan (LU-9); the Yuan-Source of the Heart meridian emerges from Daling (PC-7); the Yuan-Source of the Liver meridian emerges from Taichong (LR-3); the Yuan-Source of the Spleen meridian emerges from Taibai (SP-3); the Yuan-Source of the Kidney meridian emerges from Taixi (KI-3); the Yuan-Source of the Pericardium meridian (Shao Yin of Hand) emerges from Duigu (which is Daling, PC-7); the Yuan-Source of the Gallbladder meridian emerges from Qiuxu (GB-40); the Yuan-Source of the Stomach meridian emerges from Chongyang (ST-42); the Yuan-Source of the Sanjiao (Triple Burner) meridian emerges from Yangchi (TE-4); the Yuan-Source of the Bladder meridian emerges from Jinggu (BL-64); the Yuan-Source of the Large Intestine meridian emerges from Hegu (LI-4); the Yuan-Source of the Small Intestine meridian emerges from Wangu (SI-4). Why do all twelve meridians use the Shu-Stream (Shu) points as their Yuan-Source points?" The answer is: The Shu-Stream points of the five Zang organs are the pathways through which Qi of the Sanjiao travels, and they are places where Qi stays and stops. Why are the Shu-Stream points traveled by the Sanjiao considered the Yuan-Source points? The answer is: The moving Qi between the kidneys below the navel is the root of human life and the foundation of the twelve meridians; hence it is named "Yuan" (Original). The Sanjiao is the special envoy of the Original Qi, primarily responsible for circulating the Qi of the Upper, Middle, and Lower Jiao, passing through the five Zang and six Fu organs. "Yuan" is the honorific title of the Sanjiao; therefore, wherever the Qi stops, it is called a Yuan-Source point. When any of the five Zang or six Fu organs have disease, one should select their Yuan-Source points."

Difficulty 67 states: "The Mu-Alarm (Mu) points of the five Zang organs are all located on the Yin aspect (anterior trunk), while the Shu-Back (Shu) points are on the Yang aspect (posterior trunk). What does this mean?" The answer is: Yin diseases manifest on the Yang aspect, and Yang diseases manifest on the Yin aspect; thus, the Mu points are located on the Yin aspect, and the Shu points are located on the Yang aspect."

Difficulty 68 states: "The five Zang and six Fu organs each have the Five Shu points: Jing-Well, Ying-Spring, Shu-Stream, Jing-River, and He-Sea. What symptoms does each category primarily treat?" The answer is: The Classics state, 'What emerges is the Jing-Well, what flows is the Ying-Spring, what pours into is the Shu-Stream, what moves along is the Jing-River, and what enters is the He-Sea.' The Jing-Well points primarily treat fullness in the epigastrium/heart region; the Ying-Spring points primarily treat feverish sensations in the body; the Shu-Stream points primarily treat heaviness of the body and pain in the joints; the Jing-River points primarily treat wheezing, coughing, and alternating chills and fever; the He-Sea points primarily treat rebellious Qi and diarrhea. These are the primary indications for the Jing-Well, Ying-Spring, Shu-Stream, Jing-River, and He-Sea points of the five Zang and six Fu organs."