Final answer:
The correct needling technique for KI-23 (Shen Feng) as per CAM is a perpendicular insertion of 0.3-0.5 cun.
Step-by-step explanation:
The correct method to needle KI-23 (Shen Feng) according to Chinese Acupuncture and Moxibustion (CAM) is perpendicular 0.3-0.5 cun. When performing acupuncture, it is critical to use the appropriate needling technique to ensure the safety and efficacy of the treatment. Since KI-23 is located on the chest, it's important to needle with caution to avoid any potential harm.