C276 digging a hole in the wall

Yang Lin shook his head and laughed bitterly: "Thunderbolt Bomb isn't omnipotent. It can blast apart a normal city wall, but with such a thick city wall, if we were to just throw some explosives at the walls, there is nothing we can do about it. The mountain slope is too long, we cannot set up a catapult, and we cannot throw Thunderbolt Bomb onto the city wall