As for Lu Zhiyu, he shifted his focus to the embryonic form of the world that had been gradually bulging. It was now only a form that with a dimensional wall emerging, and there weren't even rules and orders inside yet, not to mention lands and air. Lu Zhiyu roughly calculated the time this embryonic world needed to get to the size of the space of Maria's World, and based on the time flow in astral world (as fast as that in Maria's World), it would take around ten years.
Also, it would take another ten years for the lands and ocean inside to be perfected. It was Lu Zhiyu who designed and altered the rules, flow of time and the life system inside the dimensional world, after which it needed quite a few energies and measures to amend the world. To achieve a new and sustainable world, or a world like Maria's World that was truly complete, it would take an immense amount of time and energies, which was why Lu Zhiyu needed that semi-perpetual machine to provide energies for it.