Inch, Guan, and Ruler is the concept of pulse diagnosis in Chinese medicine. There is an inch, Guan, and Ruler in each of the left and right hands, and it is commonly used clinically as the left hand corresponds to the Heart, Liver, and Kidney; and the right hand corresponds to the Lung, Spleen, and Vital Gates. The radial tuberosity is Guan, before Guan (wrist end) is inch, and after Guan (elbow end) is ruler. The inches, guan and rulers of the right and left hands correspond to different organs and tissues of the body. On the inch off the ruler corresponding to the internal organs of ancient times there are different doctrines, commonly used is the left hand inch pulse waiting for the heart, off the pulse waiting for the liver, ruler pulse waiting for the kidney; the right hand inch pulse waiting for the lungs, off the pulse waiting for the spleen and stomach, ruler pulse waiting for the life door. Doctors in the pulse, the use of inches in the right and left hand relative to the different internal organs, combined with the relevant knowledge of pulse diagnosis, as well as other clinical symptoms, you can make a certain diagnosis of the disease. It is important to note that Chinese medicine requires a combination of all four diagnostic methods to make a diagnosis, rather than relying solely on pulse diagnosis. For professional medical knowledge, it is recommended to consult a doctor.