The golden ratio, discovered by Pythagoras, an ancient Greek mathematician, in the 6th century BC, is a formal beauty principle put forward by mathematical principles, which means that the proportional relationship between parts of things is 0.6 18: 1. ? People's upper and lower bodies are limited to the navel. That is, if the ratio of the distance from the navel to the sole of the foot to the distance from the top of the head to the sole of the foot is 0.6 18, then this is the golden ratio.

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In addition to the golden ratio, there are actually silver ratio, platinum ratio and bronze ratio, which are rigorous in proportion, artistic harmony and rich in aesthetic value.