The location of Ying Yin Yu is 1.5 inches away from the posterior midline, below the spinous process of the 4th thoracic vertebra. The syncope is a dorsal acupoint of the pericardium meridian, which belongs to the foot-sun bladder meridian. It can be used in conjunction with the Shenmen, Danzhong, Neiguan, and Qiemen points to treat palpitations (rapid heartbeat, often accompanied by panic), heart pain, and other cardiac conditions. As it is located under the spinous process of the 4th thoracic vertebra, it is close to the lungs, and the acupoint has a proximal therapeutic effect, so this point can treat cough, chest tightness and other lung-related pathologies. It needs to be combined with acupuncture points such as Taiyuan and Zhongfu. In addition it can also treat vomiting, in this case, with Neiguan and Zhongkou points. This point should be stabbed obliquely into the needle, the needle should be operated by a professional physician, and should not be attempted without authorization.