Return to Thousand Fruit Forest.
Sun Wukong didn't summon the troop of monkeys, he just gave instructions and then flew off towards the direction of Lake of Rebirth. After a thorough investigation and confirmation of the overall strength of the Demon Beasts, he returned to Thousand Fruit Forest.
There and back again.
It was night once more.
"The night is dark and the wind is high, the perfect time for a surprise attack!"
On the training ground, Sun Wukong blew a whistle, and all the monkeys in the forest were instantly energized, dropping their tasks at hand to gather around the source of the whistle.
They assembled in an instant.
The monkeys stood in five neat rows, their movements synchronized, and they all looked seriously at Sun Wukong, who stood before them.