There is only one person in each Nirvana who can truly be called a god. Before Pangu, it was Hongmeng. His Nirvana was called Chaos, and Hongmeng was the supreme god in Chaos. However, he had the right to make his own modifications based on the laws of the previous Nirvana. It is not impossible to overturn them all, just like the alternation of each dynasty. If the previous ones are discarded, the results can be imagined.