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Belching with acid regurgitation is caused by the retention of phlegm-fluids in the Upper Jiao (Upper Burner) and chronic cold accumulation in the Spleen and Stomach, which prevents the digestion of grains. When grains are not digested, it leads to abdominal distension and rebellious Qi movement, resulting in frequent belching and acid regurgitation, with breath that smells sour like vinegar.

Nausea is caused by the accumulation of water and fluids below the heart (epigastric region). The Heart governs Fire, and the Spleen governs Earth; the nature of Earth is to control Water. However, when the Spleen is deficient, the Qi of Earth becomes weak and fails to control and resolve the water and fluids. The Qi of these accumulated fluids rises upward to affect the Heart. Furthermore, if aggravated by cold pathogenic factors, the Qi of Fire cannot circulate freely, causing palpitations and a sensation of wanting to vomit within the chest, which is termed nausea.

Undigested food retention is due to the weakness of Zang-Fu organ Qi and the presence of cold pathogens between the Spleen and Stomach, preventing the digestion of food. When undigested old food remains and new food enters, the weakened Spleen Qi cannot grind and transform it, leading to retention overnight. This manifests as abdominal distension, shortness of breath, belching with sour-smelling breath, sometimes accompanied by aversion to cold and high fever, or headache resembling malaria. If the Cun Kou pulse (Radial artery at the wrist) is floating and large but feels choppy upon deep pressure, and the Chi pulse (distal radial artery) is also faint and choppy, this indicates undigested food retention. For such conditions, decoctions, moxibustion/warming therapies, acupuncture, and stone therapy have separate specific formulas. Nourishing and Daoyin (guiding and pulling) exercises are attached hereafter.

The *Yangsheng Fang* (Prescriptions for Nurturing Life) · *Daoyin Fa* (Guiding and Pulling Methods) states: After eating, if one feels overly full in the abdomen and there is stagnant Qi in the intestines, one should perform these exercises before and after meals. Place both hands on the knees, lean the body left and right, push the abdomen forward, exert force with the waist towards the abdomen, do 21 repetitions (3 times 7) on the left side and 14 repetitions (2 times 7) on the right side, then turn and massage the lower back and spine to the limit. This removes stagnant Qi from the Tai Cang (Stomach), treats Pi Bi (Spleen Bi syndrome), Chang Shou (intestinal wasting), and disharmony of the Zang-Fu organs. It helps eliminate daily abdominal distension.

It further states: Close the mouth and breathe slightly, sit upright facing the "Wang Qi" direction, open the nostrils to inhale, guide the Qi down to the umbilical region, exhale slightly through small puffs twelve times to resolve Qi stagnation; bow the head and hold the breath twelve times to digest food, making the body light and strong. Practicing this in winter prevents cold.

It further states: Sit upright with the spine straight, raise the left hand with palm up, support the right hypochondrium with the right hand, inhale through the nose until the limit for seven breaths. This eliminates cold and indigestion in the Stomach.

It further states: Sit upright with the spine straight, raise the right hand with palm up, support the left hypochondrium with the left hand. Inhale through the nose until the limit for seven breaths. This resolves Stomach cold; if food is not transformed or digested, this method will lead to recovery.

It further states: During Qi circulation, bow the head and lean against a wall, hold the breath twelve times. Use intention to guide Phlegm-Fluids and undigested food out from the lower part, leading to spontaneous recovery. For Qi circulation practitioners, keep the body straight and neck curved, allowing expelled Qi to descend twelve times to cure undigested food.

It further states: "Goose-like Qi circulation": Lower arms, push knees, squat, bind the left foot with a rope, bow head leaning on arm, hold breath twelve times. This aids digestion, lightens the body, benefits Essence and Spirit, prevents evil Qi from entering, and removes myriad pathogens. Another version states: Sit upright, look up at the sky, breathe in Heaven's essence, relieve drunkenness and food fullness. Exhale dozens of times; soon one will feel hungry and awake. Practicing this in summer brings a cooling sensation.