"Dao begets one, one creates two, two creates three, three creates all things."
One represents the beginning of all things, two represents the Chaos Yin Yang Two Qi, and three refers to the third party produced by the conflict between Yin and Yang, thus evolving into all things!
Therefore, "three creates all things" means that Yin and Yang Two Qi can give birth to countless Dao embryos.
Xiang Beifei only has two Orifice Perceptions of Yin and Yang, black and white, yet he can control all systems, because any system is a branch derived from the evolution of Yin and Yang Two Qi.
The so-called great way is simple, leading to the same destination by different paths.
No matter what the system is, in summary, they are all products of the differentiation of Yin and Yang Two Qi; all things bear Yin and embrace Yang. His grandfather told him to comprehend the way of black and white, while Daoist Qingyang told him that he is the Dao. What both of them mean is actually exactly the same.