在背部，第10胸椎棘突下缘，后正中线旁开3寸。

注：本穴与内侧的胆俞(BL 19)、中枢(GV7)均位于第10胸椎棘突下缘水平。

In the upper back region, at the same level as the inferior border of the spinous process of the tenth thoracic vertebra (T10), 3 B-cun lateral to the posterior median line.

Note: BL 48, BL 19 and GV 7 are located at the same level as the inferior border of the spinous process of the tenth thoracic vertebra (T10).

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