TETRAGRAM FOR PENETRATION is one of the 96 characters in the Tai Xuan Jing Symbols Unicode subset.
The image below shows how the TETRAGRAM FOR PENETRATION symbol looks like in some of the most complete UTF-8 fonts: Code2000, Sun-ExtA, WenQuanYi Zen Hei and GNU Unifont. If the font in which this web site is displayed does not contain the TETRAGRAM FOR PENETRATION symbol, you can use the image below to get an idea of what it should look like.
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