P-3 is classified as which type of point?

P-3, also known as the elbow point or "Quze," is classified as a He-Sea point. The He-Sea points are located at the distal ends of the limbs and are typically associated with the regulation of the Qi and fluids in the body. They often have a strong influence on the organs connected to the channel as well as the related functions of the entire limb. The He-Sea points are grounded and are particularly effective for conditions that involve digestive issues and other problems affecting the lower parts of the body.

In the case of P-3, it is significant as it relates to the Pericardium channel, and its location at the elbow makes it a crucial point for addressing conditions related to the upper limbs and the heart-related issues tied into the Pericardium channel.

The other classifications of points—such as the Luo Connecting, Ying Spring, and Shu Stream points—serve different functions and have unique characteristics tied to their respective anatomical locations and relationships with the organ systems. While they all play important roles in acupuncture practice, P-3's specific designation as a He-Sea point is what makes it the correct choice in this context.