Because of the lies told by the Tathagata, Sun Wukong had been suppressed under the mountain for five hundred years, and his resentment, far from being diminished, had become as rich and potent as aged wine over time.
After five hundred years, one can imagine how far things had gone.
"Hehehe..." After recounting the events that had happened to him to Jiang Liu, Sun Wukong grinned and laughed mockingly, "That Guanyin really has some nerve, coming to I, Old Sun, claiming that my time of tribulation had ended. So the so-called end of my tribulation was just to serve as their lackey? If I, Old Sun, refuse, then I'd be suppressed under this mountain forever, isn't that right?"
