Each of the eight trigrams consists of three lines and each line is either divided (- -) or undivided (—), representing yin or yang respectively. The eight trigrams are: qian (), kun (), zhen (), xun (), kan (), li (), gen (), and dui (). According to the ancient Chinese, the eight trigrams symbolized basic things and phenomena of nature or society and represented heaven, earth, thunder, wind, water, fire, mountain, and lake respectively
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