The sun's blood can strengthen their body and at the same time can increase their lifespan as their life level increases and if they cultivate actively by absorbing the sun's energy patiently their strength will improve rapidly.
And then Wang Wei said to Wang Yang at last " Oh yeah I will open the world's barrier and let you all out for ten years and you all have to choose a particular skill and learn that skill and then master the skill and return to the sun's world to began civilisation of our own. "
" So use this time wisely and absorb as much suns energy as possible and strengthen yourself. "
After saying that Wang Wei sent Wang Yang away from the moon made of suns water and continued to absorb the suns energy and pure yin energy for his cultivation.
With not enough strength to fight against Wang Wei, Wang Yang can only obediently do what he had been ordered. But he's not that much sad after learning that he can go out of the sun world in ten years.