在背部，横平第7颈椎棘突下缘，后正中线旁开2寸。

注：两臂自然下垂，经第7颈椎棘突下缘画一水平线，经后正中线与肩胖骨内侧缘外113与内2/3交点画一垂线，两线之交点即本穴。

In the upper back region, at the same level as the inferior border of the spinous process of the seventh cervical vertebra (C7), 2 B-cun lateral to the posterior median line.

Note: SI15 is located at the intersection of two imaginary lines: the vertical line of the junction of the lateral one third and the medial two thirds of the line connecting the posterior median line with the medial border of the scapula and the horizontal line inferior to the spinous process of the seventh cervical vertebra (C7).

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