The four numbers of "6, 7, 8, 9" differs in denotations in Zhouyi and Hetu.
“六、七、八、九”四数在《周易》与《河图》中的含义并不一致；
The five-element numbers of Hetu should not be confused with the four-image numbers of Zhouyi.
《河图》的五行成数不能与《周易》四象数混同。
There are black and white spots arranged into number array on the Hetu which contain indefinite mysteries;
河图上，排列成数阵的黑点和白点，蕴藏着无穷的奥秘；
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