On the fourth day of the apocalypse, Richard spent his time on the sixth floor, observing the volunteers as they diligently practiced their shooting skills. He recognized the indirect benefits of these training sessions, as the zombies they gathered from the streets served as practice targets. The process not only improved the recruits' abilities but also converted the zombies into valuable resources, yielding gold and experience points. Yet, despite these gains, he found himself still short of leveling up to the next rank.