The construction workers and formation masters all walked out of the Sun Academy with reluctance. As every second they are inside the sun academy their strength increases passively.
So as long as the students have talent and even if they didn't absorb the sun's energy actively their strength will increase tremendously before they graduate.
But if they cultivated actively and using instructions that will be given by the elders, grand elders. Their strength will increase even more and there's the possibility of them becoming the next elder of the sun clan and defending against so-called outer demons that are there to invade their world.
After building the Sun Academy the empire selected the first batch of students the Academy with thousands of strong people to teach them inside the sun academy in an open class to reach most of the students with a limited amount of teachers.
I am writing a new novel called Earth Wolf God. If some of you want to you can read it and support me more.