In One Piece, I Just Became One of the Celestial Dragons

After reading the introduction, I didn't want to read this book. You traveled through time and became a Celestial Dragon. It's okay for you to fight against the four emperors, but what are you going to do against the three generals?

The protagonist doesn't know what kind of time travel novel One Piece writes.

It's true that whatever I wrote is invincible, it's still there.

I just want to know how the Zhenzhen Fruit became a third-rate fruit.

What a crappy thing I wrote, and it was turned into an argumentative essay. I was convinced.

I feel relieved when I see so many people scolding you.

What is this written about? It's a bunch of hydrology.