Gao Yang completed the action from aiming to firing with the greatest speed of his life.
Cui Bo managed it. The sniper hidden behind the window really did turn his gun barrel away, and when Gao Yang fired, the sniper's sight was not on Gao Yang.
The bullet fired by Gao Yang hit the sniper's left eye, passed through the brain, and flew out with a burst of red mist.
Quickly moving the gun barrel back to the rooftop where Cui Bo was located, Gao Yang saw Cui Bo holding a big hammer, with the hammerhead against his chest and the handle pointing towards the sniper's window, mimicking a shooting posture. It was precisely because Cui Bo successfully deceived the sniper that Gao Yang had the chance to shoot.