My World Is Very Scientific

Zhang Fan traveled to a world where he could become a god at birth, and created his own world after finishing elementary school. While everyone else was cultivating fantasy races, Zhang Fan's world of human tribes quietly emerged. This world was extremely scientific. During the mid-term exam, there was a bunch of weird fantasy races on the opposite side, and Zhang Fan was... Ding, plane invasion detected, contamination-free nuclear strike preparations... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.