The Great Merman Empire

The enemy's advantage is the iron-clad ship, so as long as they develop iron-eating fish that eat iron, or poisons or liquids that can quickly corrode iron, and fish that eat wood. A sheep without a boat is a sheep without wool. You can also arrange for your men to hollow out the islands occupied by humans, or let them be swallowed up by large sea beasts. You can also demolish the land and create more rivers to the land. Use the resources in the treasure house to hire lone mercenary sea beasts from the deep sea to attack the land, destroy important supply points, fruit trees and other fields, farmland, pollute the water source for people to drink, turn it into sea water, and destroy the shipyards and the mining areas that produce shipbuilding wood. Don't use too many methods.

It's quite interesting. As a mermaid, the protagonist doesn't show mercy or beg for mercy when faced with human invasion. It's quite interesting. I don't think there's any problem

Good-looking, with a sense of narrative

Lots of typos, but it looks good

New stories, new patterns, new wisdom

Good article, the text is a bit redundant, but generally good

Not bad. So be it.

The book is very good, and the protagonist has set his position correctly, but sometimes he repeats some words meaninglessly, such as the consequences of repeating this in the part about the protagonist's development and education.