It might be a coincidence or Heaven's Will, but the four master-disciple members just happened to bump into the robbers who were looting the Kou Family, and these guys were even suicidal enough to try to rob the west-bound team too.
The Monkey, having no choice, fought back and ended up not only keeping their belongings but also gaining more gold and silver than they could carry.
In the end, they were caught red-handed, and the master and his disciples ended up behind bars.
Yes, Sun Wukong didn't resist; they just went in. His inaction was not due to fear of anyone but because, having learned from previous experiences, he wanted to handle things gracefully.
You accused us unjustly? Tomorrow I'll have you begging on your knees to let us out!
Of course, he then slipped away to show some spirit at the Kou Family, play ghost at the County Magistrate's, and add some special effects at the county government.
