The Monkey King at this time didn't have any thoughts of eating; it thought only of escape, of fleeing the control of humans. With its current abilities, even without a body, it could live freely outside.
Even if it couldn't be a king anymore, that was still better than being sealed in its body with no freedom for millions of years. What it needed was freedom.
Would Jiang Tang let the Monkey King escape?
Naturally, he wouldn't. Once again employing a familiar trick, he took out a magical treasure, the Hell Palace, and collected all the monkeys on the mountain, including the Monkey King, within it.
Jiang Tang did this, of course, to avoid future trouble.
This Monkey King had been here for millions of years. If it were to be stolen away, this place would become restless.
Indeed, only the Hell Palace could take away these monkeys, and he wasn't bothered about whether two monkeys meeting each other would start fighting.