Since it was mentioned that many people are there at the scene, maybe those people called the police and ambulance, and the person got lucky got the treatment in time and survived.
Also, there is this scene where the person who jumped(I don't remember his name) tells Kim An that it has also been rough for him the past 2 yrs. Maybe he was in the hospital getting treated..
Yeah!! added the spoiler tag..
My assumption:-
Since it was mentioned that many people are there at the scene, maybe those people called the police and ambulance, and the person got lucky got the treatment in time and survived.
Also, there is this scene where the person who jumped(I don't remember his name) tells Kim An that it has also been rough for him the past 2 yrs. Maybe he was in the hospital getting treated..