Regarding the monster density in the Umbrella Biological Test Field, if we were to distinguish proportions, about eighty percent of the monsters are found in the urban areas, while only a scant twenty percent are distributed in the suburban environment. This is why Zhang Yanhang always said that the monster density is not quite uniform, as it is indeed quite uneven.
Furthermore, when analyzing monster density based on the land area, it becomes even more imbalanced. Out of the 40,000 square kilometers of the Umbrella Biochemical Test Field, the urban area occupies only about 15,000 square kilometers, while the outskirts take up 25,000 square kilometers.
We can say that the suburbs not only have a large area but also a significantly low number of monsters, making it particularly 'spacious' in a sense.
