If you want to take someone out, naturally you need to know where they are.
If the target is a completely unguarded person, it's easy enough to say, but if the target is a big intelligence dealer who controls the largest intelligence channels and then goes into hiding, then it's naturally very hard to find.
The best chance to take out Mario, of course, is to wait for him to appear in public, but even if Mario wants to make a public appearance, he will never announce it beforehand, so intelligence is still needed, and you still have to know Mario's itinerary to have the chance to strike.
And the task of obtaining Mario's itinerary, besides Justin, no one else could handle it.
Upon learning that Justin awoke, Gao Yang boarded a plane to Greece without hesitation.
Justin was hiding in a not-so-big but very high-end private clinic in Athens.
