The Great Merman Empire

The enemy's advantage lies in their ironclad ships. Therefore, if we research iron-eating fish, or poisons or liquids that can rapidly corrode iron, as well as fish that eat wood, then without ships, they're like sheep without wool. We can also have our subordinates hollow out the islands occupied by humans, or let large sea monsters devour them.

It's quite good. The protagonist, as a merman, doesn't show mercy or beg for mercy when faced with human invasion. I think there's nothing wrong with it.

It's visually appealing and has a narrative feel.

It has many typos, but it looks very nice.

New stories, new landscapes, new wisdom

Good article, though a bit verbose, but overall it's fine.

I'm giving it a five-star review, but I have a question. How many people are reading this? Have you signed a contract?

Not bad. Fine, whatever.

The book is good, and the protagonist has a clear understanding of his place. However, sometimes he repeats certain lines meaninglessly, such as the part where the protagonist focuses on education and keeps repeating the consequences of his actions.