在背部，第6胸椎棘突下缘，后正中线旁开3寸。

注：本穴与内侧的督俞(BL16)、灵台(GV10)均位于第6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 sixth thoracic vertebra (T6), 3 B-cun lateral to the posterior median line.

Note: BL45, BL16 and GV10 are located at the same level as the inferior border of the spinous process of the sixth thoracic vertebra (T6).

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