Regarding this matter, Zhang Yanhang planned to wait until he had time later to fuse another Thermo-baric Bomb +4 to test the specific coverage area and to study the growth pattern of the coverage area of the Thermo-baric Bomb as well.
By the way, the direct coverage area that Zhang Yanhang mentioned here refers only to the area that could be reached by the high-temperature and high-pressure fireball formed by the Thermo-baric Bomb, but in fact, the shock wave, which also poses a lethal threat to monsters, covers a much, much larger area.
Although Zhang Yanhang's Seeking Fortune and Avoiding Evil's scanning range was insufficient, based on his naked-eye observations, the direct coverage diameter of the high-temperature and high-pressure fireball was indeed only four kilometers, but in fact, the area within several tens of square kilometers was essentially swept over by the shock wave.