在腰部，第1腰椎棘突下缘，后正中线旁开3寸。

注：本穴与内侧的三焦俞(BL 22)、悬枢(GV5)均位于第1腰椎棘突下缘水平。

In the lumbar region, at the same level as the inferior border of the spinous process of the first lumbar vertebra (L1), 3 B-cun lateral to the posterior median line.

Note: BL51, BL22 and GVS are located at the same level as the inferior border of the spinous process of the first lumbar vertebra (L1).

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