Survival in the Cracks of Doomsday Survival

A zombie crisis has broken out around the world, and biological instinct makes humans desperate to survive. There are system owners among zombies and humans, but the catch is that everyone in the protagonist group does not have such a thing. As long as you can live, as long as you can live. Being trapped in a closet or blocked in a cupboard by zombies, any gap that can avoid zombies is an opportunity for human beings to survive. In the dark city, there is a faint light beside the sewer manhole cover; on the streets lined with high-rise buildings, there is a dim firelight on the highest building. As an ordinary person who is not bound to the system Can we survive? In other words, does humanity still have a chance to find a glimmer of hope in this doomsday world?