Which of the following pairs includes a point that is NOT a xi-cleft point?

The reasoning behind identifying the pair that includes a point that is not a xi-cleft point lies in understanding the definitions and classifications of acupoints in Traditional Chinese Medicine (TCM).

Xi-cleft points are specific acupuncture points that are recognized for their ability to treat acute conditions and pain, as well as for their role in moving and regulating qi and blood. Each of the five yin organs and six yang organs has a designated xi-cleft point.

In the presented answer, KI-9 (Zhu Bin) and HT-4 (Lingdao) were chosen because only one of these points is a xi-cleft point. Specifically, KI-9 is indeed a xi-cleft point, while HT-4 is not designated as such; it is categorized instead as a jing-well point. This means that while KI-9 serves the function characteristic of xi-cleft points in terms of its therapeutic uses, HT-4 does not share this particular classification.

In contrast, the other pairs include both points that are recognized as xi-cleft points. For example, TB-7 (Huizhong) and KI-8 (Jiao Xin) both serve this function, as well as GB-35 (Yangjiao) and BL-