Everyone was stunned. They didn't expect Zhao Hai to come up with such a plan, but they had to admit that it might work.
Yes, the defensive lines of the cities of the anti-Saint Academy Alliance were too long. The Saint Academy could attack any city at any time, and they had to be on the defensive. As a result, there were loopholes everywhere.
But at the same time, the sacred Institute wasn't without weaknesses. Everyone knew where the sacred Institute was. If they really attacked the sacred Institute, no one would be able to find their target.