What is the primary action of the xi-cleft points?

The primary action of the xi-cleft points is to gather and deepen Qi and Blood. These points are specifically designed to regulate and direct the flow of Qi and Blood, especially when there is a potential for stagnation or accumulation of pathological factors. Xi-cleft points are effective in treating acute conditions and emergencies because they can deeply influence the underlying energetics within the body. When Qi and Blood are gathered at these points, it allows for a more concentrated therapeutic effect, enhancing the body's ability to respond to pain, injuries, or other sudden health issues.

In contrast, other options focus more on broader or different therapeutic actions. While xi-cleft points can indeed influence the flow of Qi, their primary significance lies in their role in gathering Qi and Blood rather than simply facilitating flow. Similarly, xi-cleft points are not primarily used for treating chronic conditions or to release superficial energy, making them distinct in their specific functional purpose within the meridian system.