Charles trusts Tuba for the time being.

This guy is indeed crazy, but judging from his previous actions to help him, he should not be hostile, otherwise he would not have helped and let the pirates capture them directly.

Walking on the rocky aisle, Charles could see the pirates as big as an ant on the pier below, and the warships like toy ships on the sea in the distance.

The aisle in the mountain city is relatively narrow, and scattered pirates pass by them, but they have no intention of attacking. They glanced at Tuba and did their own things.

It seemed that Tuba, who was placed on top of his head with a cross in front, really played a role.

"Mr. Charles, are we really invisible? Why don't they attack us?" Lily, who was standing on Charles' shoulder, stretched out her little claws in curiosity and grabbed the clothes of a pirate next to her.

"No."

Charles knew they were definitely not invisible, but he was also a little confused about how the old madman in front of him did this.

Following Tuba, they walked around the mountain city for nearly half an hour, and they came to a low cave.

"When we pass through here, we can see what you are looking for." Tuba said with a smile, and bent down and crawled in first.

"The fuel you mentioned is buried in this mountain, right?" Charles asked Tuba.

If the fuel is really in this way, then he would not be as easy as taking people into the black exchange just now, at least he would have a glimmer of hope from there.

If you really want to transport fuel from this mountain, I am afraid that the pirates have surrounded them long ago before they can move them.

"No, on the other side of the mountain, the fuel comes from that." Tuba in the cave replied in a muffled voice.

The environment inside the cave is short and stuffy. People must walk half-squat while walking, which seems very depressing.

After walking in this environment for nearly ten minutes, Charles and the small mice with excellent body resilience were all okay, but Feuerbach could not hold on.

Listening to the sound of breathing behind him heavier, Charles asked: "How is it? Is it okay?"

Feuerbach wiped the sweat from his forehead with his sleeve. "It's okay! It's just a little frustrating. Compared to this environment, the vast ocean belongs to me."

This discomfort did not last long. Five minutes later, they came out from the other side of the mountain.

The scenery in front of me suddenly became wider. Standing halfway up the mountain, Charles looked down. Scattered buildings of all sizes are located in the valley between the mountains.

But Charles's eyes did not fall on the buildings, but looked at the most eye-catching ruins of a giant ring facility by the sea in the distance.

It was a huge industrial facility that was not much smaller than the surrounding mountains. Although it had been corroded by time, Charles was still very shocked.

"Wow, pirates cannot make such a big thing, so they should be made by the foundation. Why do these guys have it everywhere?" Richard jumped out.

"There is where the fuel comes out," Tuba said, pointing to a group of buildings under the ring facility.

The place where Tuba refers to the estimated size of a black shed of four football fields. From the top, you can't see what's inside. You can only see several high towers erected around, and the searchlights shine the surroundings brightly. The guard is very strict.

At the height of the station, Charles also saw some details. Behind the factory, there were several chaotic and cross-arranged rails connected.

It was not the train tracks but the mine cart. The mine cart carried some things and drove towards the back of another mountain on the island.

Because the distance was too far, Charles couldn't see clearly what was on the mine carts, and only saw that the rocks were black.

"Let's go down." Tuba, with a happy face, walked down the steep stone road.

"Is the fuel here a coal mine or a residue waste oil boiled from whale oil?"

As for Charcoal Charles, he didn't ask at all, how could there be charcoal fuel in such a place that doesn't even grow grass?

"Coal Mine Whale Oil? What is that? I don't know. We called it black balls. We have been here for so long and have been burning with that thing."

Charles thought in his heart. "It sounds like a coal mine, it seems that this island has abundant coal mine resources."

After descending from the mountain, they approached the giant facility carefully.

After walking quietly along the circular facility for a few minutes, they were already very close to the black shed complex. Charles could even see the white air exhaled from the mouths of the patrol pirates on the platform.

Tuba was about to walk towards the black iron gate of the complex when he was stopped by Charles. "What are you doing!"

"It's okay, I'll be invisible, not afraid! They can't see us." Tuba patted his chest and took out the wrinkled cross.

However, Charles couldn't let him make a fuss. Maybe Tuba did have any special abilities. It would be fine if he was just an ordinary pirate before, but it was obviously an important place in the island, and there must be more powerful pirates guarding it.

As long as Tuba makes a little mistake, Charles' entire mission will be wasted.

And he has a better choice than letting this madman rush in like this.

"Lily, let your friends explore the way," Charles said to the mouse on his shoulder.

The small mouse is obviously suitable for lurking and inquiries, which is also the reason why Charles brought Lily over.

"Squeak~Squeak~" The dark brown mouse next to him jumped quickly for a while, and the four mice ran towards the complex along the dark corners.

"Mr. Charles, don't worry, I've taught them a lot before, Tiaotiao will definitely explain it clearly this time."

Charles, with a solemn expression, nodded. As long as they could find out whether this was a fuel plant, their mission to go to the island this time would be completed.

As time passed little by little, Charles, who was gradually anxious, took out his pocket watch from time to time to confirm the time. He had never felt that time was so long.

"Brother, do we want to go here and have a look?" Richard turned his eyes to the huge circle beside him.

"Don't make trouble for nothing. Haven't you caused enough trouble?" Charles squeezed out this sentence from his teeth.

"How can you ask for trouble if you have nothing to do? It's broken and there's no top left. What dangers can there be? Look, there are spider webs there."

Charles stood still and looked at his pocket watch.

"It's boring for you like this. This kind of facility is from the foundation. Go inside and see what's wrong. They came down from the surface. What if there is any key information about the export."

"Don't talk nonsense, I don't want to argue with you at this time."
Chapter completed!