Sun Dasheng, who had his identity changed by the six-eared macaque in a "real and fake Sun Wukong" game, was suppressed by the Tathagata, and he revealed his supreme cultivation and reincarnated back to the ancient times.
In that era when the ancient Buddha of Ran Deng was still a Taoist and Guanyin Bodhisattva was still a man, we saw the rise of Lord Buddha Tathagata and the Jade Emperor of Heaven, creating the legend of the Demonic Monkey King.