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The needle inserted at 5 o'clock is half an inch deep.

In China, the depth of 5 minutes is half an inch, which is equivalent to12.5mm..

The needle went into 5 points, which is half an inch deep. Generally, 1.5 inch needles are mostly 4 mm, and 1 inch needles are mostly 25 mm According to the characteristics of acupoints and the length of needles, etc!

The depth of acupuncture in traditional Chinese medicine is determined according to the characteristics of acupoints and the length of needles. The depth of acupuncture for 5 minutes is generally half an inch (0.5 inch), that is, 12.5 mm (one inch equals 25 mm).