Recovery plan!
That was a method that was specially built to deal with the fault of the martial arts inheritance.
The physical bodies of divine-level star beast martial artists were separated and sealed in the underground of each city. Their physical bodies were used as the array cores to gather even stronger heaven and earth spiritual energy.
That method was currently only used by the Nine Provinces.
Only the Nine Provinces had that level of array.
Other nations also had their own methods. The most famous one was the genetic research project in America. They wanted to extract more energy from the star beasts and fuse it directly with the human body, they wanted to create powerful warriors even faster.