It is located on the back of the body and is an acupuncture point of the foot solar bladder meridian, specifically positioned under the spinous process of the 4th thoracic vertebra and 1.5 inches next to it. However, it is important to note that the inch is different from the usual size, but is a unit in meridian science, whose length is equivalent to the length of one finger joint. For example, if you curl up your middle finger, the length of the middle section of the middle finger is called 1 inch. The point is often used to treat diseases of the cardiovascular system or respiratory system, and can treat symptoms of panic, palpitations, chest tightness, or coughing.