Rebirth is not a gift, it is a curse. When Sun Wukong opened his eyes at the foot of Five Elements Mountain on the 500th century, memories of five hundred lifetimes flooded into his mind - only then did he realize that he had been trapped in the cracks of time for five hundred years.
It turns out that he has gone back and forth five hundred times, and each time he leads to the ending of "fighting and defeating the Buddha" according to the established script. This time, he was reborn with the memory of five hundred generations, and decided to jump out of Tathagata's palm and overturn the chess game that had been played for hundreds of millions of years.