What is located midway between Du-14 and the tip of the acromion?

The point located midway between Du-14 and the tip of the acromion is GB-21, also known as Jianjing. This point is situated on the shoulder and is important for its therapeutic benefits, particularly for issues related to the shoulder, neck, and upper back.

To elaborate, Du-14 is a significant point along the midline of the body, located at the lower border of the seventh cervical vertebra, while the tip of the acromion is a bony prominence on the shoulder. The anatomical location of GB-21 reflects its middle position relative to these two anatomical landmarks, emphasizing its relevance in acupuncture for treating musculoskeletal conditions in the upper body.

GB-21 is particularly noted for its ability to promote the flow of Qi in the shoulder area and aid in reducing tension and pain. It's commonly used in treatments for conditions such as shoulder stiffness, neck pain, and headaches. The positioning of this point, therefore, makes it critical for practitioners to accurately locate and utilize in clinical practice. Other choices do not correspond to this specific anatomical relationship, making GB-21 the correct answer.