Why is the "Advance City" in the original Pirate book a defense like a copper wall and an iron wall?

This has a certain relationship with the whirlpool currents surrounding the "Propulsion City".

In the original work of The Pirates, "Propulsion City" and Marine Headquarters, Marin Vandor, and Judicial Island are in the shape of a triangle. Because they are located in the windless zone of the great route, and there are huge vortex currents between the three, unless they are called The gate of the "Gate of Justice" is opened and the whirlpool current is closed, so that the ship can enter the "Propulsion City" smoothly.

Otherwise, even if someone can escape from "Propulsion City", but they cannot open the "Gate of Justice", they will still be trapped inside "Propulsion City".

In this way, it seems that most of the terrifying prisoners are fruit-powered, and they can only wait for themselves to be captured by the guards of the "Propulsion City". After all, they cannot leave the "Propulsion City" by swimming.

And those who are not capable of fruit?

Ok...

No matter how strong they are, can they be stronger than the power of nature?

In the face of the natural whirlpool currents, it is very difficult for a powerhouse like Cap and Rayleigh to leave the "Propulsion City", and a little carelessness may lose his life.Therefore, in recent years, prisoners trapped in "Advance City" basically have no chance of escape. The first exception in the original Pirate book is the "Golden Lion" with "White Beard" and Pirate King Roger.

However, the "Advance City" like a copper wall and an iron wall can trap most people, but there is no way to trap Chu Yi.

While sitting on the warships of the Warring States Period and heading to the "Propulsion City", Chu Yi slightly sensed the surrounding vortex ocean current, and a faint sneer was raised at the corner of his mouth.

At exactly this time, the Warring States period caught a glimpse of the sneer on Chu Yi's face, and the corners of his mouth twitched fiercely. He said, "The so-called "Gate of Justice" can't hold you down, right?"

"Ok."

Nodded silently, Chu Yi didn't say much, but in Chu Yi's heart, he already thought of at least three ways to leave "Propulsion City".

The first is relatively simple and rude, which is to directly use the space mystery.

The mysterious use of space, not to mention that Chu Yi was trapped in the "Propulsion City", it was said that the prison was ten times stricter than the "Propulsion City". Chu Yi could leave if he wanted to.What's even better is that even if Chu Yi is a person with fruit abilities, he can still use the space secretly to go wherever he wants to go when he is restricted by the Hailou stone handcuffs.

This is the terrible "rules"!

The same is the "rule", and it is a better "rule" for Chu Yi to master. Chu Yi can completely resist the power of taboo mystery, which is the restriction of the Hailou stone handcuffs to those with ordinary fruit ability.

As for the second method, Chu Yi wanted to leave "Advance City", but it was still a bit rough.

Because Chu Yi is completely able to use the power of heaven, and fly away directly from "Propulsion City"!

In this way, the third method for Chu Yi to leave "Propulsion City" needless to say. By directly stepping on the "Moon Step", Chu Yi can rely on his terrifying physical strength to easily move from "Propulsion City". "go away.

It was also because of this that the "advanced city" that outsiders seemed insurmountable was like a small pit in front of Chu Yi, and it was enough to step out if you wanted to jump freely.

The Warring States period knew that the prison that wanted to trap "Sura" has not been built yet, so Chu Yi knew that "Propulsion City" could not trap the Warring States period. Instead, Chu Yi asked after nodding his head: "Maybe this problem. It's more presumptuous, but "Sura"...I want to know if there is any room for improvement in "Promotion City"?"

"Improvements? There are many."

He didn't mind making the "Advance City" stronger, Chu Yi pondered for a few seconds, and then directly said to the Warring States Period, "Warring States, do you know the "rules"?"

"Well, I have learned a little from Zefa and Karp, and I myself... also have the ability to master the "rules"."

"It's easy if you know, then I'll just say it."

After getting the answer he wanted from the Warring States Period, Chu Yi smiled slightly: "Anyone who can master the "rules" should know that there are four "rules" in the "rules" that have the most terrifying power. They are the soul. , Space, time and taboos. Compared with the "rules", I prefer to call these four "rules" mysteries, that is, the mystery of soul, the mystery of space, the mystery of time, plus a forbidden mystery."

"The mystery of the soul is the main aspect of my research. The reason Kapu is afraid of me is because my soul is strong enough. The mystery of time, um... the yellow ape has the mystery of time, so if you are interested If so, just have a good chat with Huang Yuan and see if he can tell you the mystery of time."

"As for the mystery of space, don't I need to explain it?"

"A person who masters the mysteries of space can open space anytime and anywhere, and leave from the "Propulsion City". Therefore, if you want to strengthen the defense of the "Propulsion City" in the Warring States Period, the first thing you need to do is to dig out some talents with the mysterious space. Let them be able to isolate the "advanced city" from the outside space, so that other people's space secrets cannot be used under restricted circumstances."

"then..."

As he said, Chu Yi paused, and was silent for a while before continuing: "Then, it would be better if you could dig out the strong man who mastered the mystery of the taboo. Let the strong man who master the mystery of the taboo create around the "Propulsion City" A forbidden mystery protective belt, as long as the fruit ability is in the protective belt, it will be affected by the forbidden mystery and cannot use the fruit ability. However, using the forbidden mystery to cover the surrounding "Propulsion City", you need to think about it."

"After all, the mystery of the taboo is irrespective of the enemy or the enemy. If the navy in "Propulsion City" can't use the fruit ability, it must be easier for the prisoners in "Propulsion City" to escape?"

After listening to Chu Yi's words, the Warring States Period was also silent for a long time before he nodded vigorously with Chu Yi.

And after listening to Chu Yi’s words, the Warring States period really realized that there are many magical powers in this world, such as soul mystery, time mystery, space mystery, plus the forbidden mystery. These are the powerful "rules" that the Warring States cannot imagine. Humans can directly generate a top powerhouse in the sea.

As for the improvements that Chu Yi said about the "promotion of the city", the Warring States Period also fully listened to it.

Thinking that in the future, if he could control and master the mysteries of space, and the forbidden mysteries would be used to reinforce the defense of "Propulsion City", the Warring States Period slightly narrowed his eyes and said to himself:

"If I really have the ability to improve the "Propulsion City" in accordance with the "Sura" method, will the improved "Promotion City"..."

"Can you trap "Sura"?"