Returning from cultivating immortality, the top scorer in the college entrance examination goes bers

The immortal venerable failed his tribulation and his soul transmigrated back to Earth three months before the college entrance examination.
He used to be able to control the fate of the three realms with a flick of his wrist, but now he's become the worst student in his class, and it's been predicted that he can only work in a factory as a screwdriver.
He swept through the examination hall with the wisdom of an immortal, achieving perfect scores in all subjects and becoming the top scorer in the province, causing an uproar across the internet!
He confronts unscrupulous teachers and bullies, and with his unparalleled medical skills and formation abilities, he goes on a rampage through the city.
In this life, he will not only become the most outstanding scholar, but also reclaim the pinnacle of the Three Realms!