Dìng Chuān (M-BW-1) is located at which of the following positions?

• A. 1.5 cun lateral to the fifth thoracic vertebra spinous process.
• B. Behind the ear, midway between Fengchi GB-20 and Yìfēng SJ-17.
• C. On the lower abdomen, 3 cun lateral to the midline, level with Ren-3.
• D. 0.5 to 1 cun lateral to the depression below the spinous process of the seventh cervical vertebra (DU-14).

Answer: (D)

Ding Chuan is an extra point located a short distance to the side of a midline neck point. The midline reference is the depression below the spinous process of the seventh cervical vertebra, which marks DU-14. Ding Chuan sits about 0.5 to 1 cun lateral to that spot, placing it in the upper neck/shoulder area near the DU meridian. This location is specifically used to help with wheezing and coughing by promoting qi movement and clearing lung-related issues. The other described locations correspond to points in different regions (midline lower back, area behind the ear, or the lower abdomen), so they do not match Ding Chuan.