With a large number of telepathically-linked doppelgangers, learning speeds up significantly. In just three days, they have almost mastered all the basics. And because they think in different directions, they can propose different solutions.
After all, reaching the peak of the ninth tier makes learning such things in a cloud-sweeping fashion exceedingly easy.
Of course, no one outside knows this, not even Xiaobai, who lives with them, discovered it. Because whether it's learning or research, the doppelgangers are doing it, allowing the original body to continue with his own affairs.
The development of technological power in the Home World is not restricted by the world will.
The world will inherently doesn't control these things, but there are indeed invisible restrictions, which is to avoid large-scale destruction. It mustn't cause too much impact on the world itself.
