How did Jason Wu kill the hostage-taking bandits in Wolf Warriors? Why did he hit a wall?

The ultimate goal of a sniper is to kill a single shot, but when a robber holds a hostage, Jason Wu's vision is blocked by the hostage's head and bricks on the wall, so he can't kill a single shot. And Jason Wu's comrades-in-arms have been injured, and their lives are in danger. At the moment, they can't be deadlocked by robbers, and they must be treated immediately. Jason Wu wanted to kill the robber at once, but the sniper rifle he took was limited in power, and he couldn't penetrate the plank brick with one shot. So he fired three shots at the same position, and the strength was superimposed, which penetrated the plank brick and hit the robber's head, winning time for treating his comrades. Thank you.