The civilization of humanity in the Ice Abyss World, although fallen, is not completely lost.
From the beginning of his journey, Xia Hong had already discovered this.
While humans have indeed regressed to a primitive era to some extent, this was largely due to the extreme environment's pressure. Yet, from many aspects, one can still see traces of civilization's former existence.
From the human camps' concepts of family and marriage, surname culture, funeral rites, even the writing system; down to basic craftsmanship, gathering tools, and leather products, up to cooking food and avoiding raw water, and so on...
Initially, Xia Hong thought these retained habits were due to the disaster that caused civilization's downfall not being too distant in past, but he overturned this idea considering the harsh cold environment and biological evolution.