Absolute Regeneration!
The sound of roars and bangs was the first thing Bai Zemin could make out as he approached the exit of the subway parking structure. Furthermore, although it was barely distinguishable due to the overwhelming sound of what he assumed were the mutated ape's attacks, Bai Zemin could also faintly feel the sound of the wind being pierced by what he thought were Chen He's arrows.
A split second later, Shangguan Bing Xue's cold voice reached his ears followed by a roar from the mutated ape. Obviously her attack had managed to inflict enough damage for its roar to change.
Two seconds later, Bai Zemin finally reached the surface and his footsteps paused for a moment to take in the surrounding situation. After all, he didn't want to die shamefully by rushing into battle without knowing what exactly was going on.