1. Why did it not enter the eighteenth epoch but the Great Nirvana of the seventeenth epoch
Let me explain. The reason why there was no great Nirvana of the seventeenth epoch was because the material in the seventeenth epoch was so scarce that it could not stop the expansion of the void.
Energy and material were conserved. Energy and material were conserved. How much material there was in the first epoch, how much energy there was, and how much material and how much energy there would be in the second epoch.
However, there was a group of people who became Daoists. The first wave that the Master of the Mycroft Palace set off, the Master of the palace lived until the second epoch, and more people lived until the third epoch.
The total mass and total energy of the universe were concentrated on more and more Daoists. They occupied a large part of the universe, causing the mass and energy of the universe that would be born in the future (except for those Daoists) to slowly decrease.