Time gradually passed, and in the end, the Fish Scale world agreed to ally with the outside worlds to resist Great Qin.
In actuality, the Fish Scale people had benefited from Great Qin. If it wasn't for Great Qin, the Fish Scale world would have been invaded by the three worlds. Even though they could use water as a natural barrier, in the end they would have been destroyed.
Now, because of the massive threat that was Great Qin, the three worlds did not have the heart to invade the Fish Scale world. They just wanted to obtain power to resist Great Qin, so they naturally would not do anything to the Fish Scale world.
Since the Fish Scale world had decided to oppose Great Qin, Great Qin decided to attack the Fish Scale world.
The Fish Scale world had thought that because Great Qin was tied up by the outside worlds, it would not dare to do much to them. If Great Qin launched a sudden attack now, they would be able to obtain good results.