Intelligence doesn't just fall from the sky. If you want intelligence, you either buy it or find it yourself.
Even a big shot like Justin in the intelligence community can't possibly have his own intelligence network everywhere.
Wherever there are hotspots or needs, Justin sends people. His biggest advantage over outsiders is having the right personnel and channels to rapidly establish an intelligence network in a hotspot in the shortest time.
But no matter how fast Justin is, he needs time, and for Gao Yang, if he has to buy specific operational intelligence from Justin, losing the fight is not far off. He must at least have his own channels and network so he won't be in the dark once he's without Justin.
To intimidate the enemy, boost the morale of his people, and rein in those who might defect to the enemy, Gao Yang needs to fight a battle as soon as possible. Even if it's just wiping out an irrelevant cannon fodder team for Djo, he'd have to know where they are to strike.
