So for the two of them, the danger came from the five alien adventurers and the alien fish.

The system can monitor most of the island even in the safe house, so the danger of alien adventurers is not a danger to them. What is dangerous are the alien fish with increasingly higher levels.

"Since those alien adventurers have set up safe houses on the island, let's also set up safe houses," Wen Yubai said.

Pei Shibin nodded and said, "Just put it in a special safe house. It will consume less energy."

The special safe house does not need to activate the protective shield no matter how the monsters below level six attack, so it is more economical than the high-level safe house.

The two decided that if nothing unexpected happened, they would stay here until the end, and Wen Yubai released her special safe house.

It was still more than half an hour before dark. Wen Yubai looked at the endless and desolate island and said, "I'll add a wall."

Wen Yubai's gold-related abilities were somewhat behind her mental abilities in level. Now that her mental strength had fully recovered, she had to use her gold-related abilities more when she had time to advance as quickly as possible. Pei Shibin naturally agreed.

Although there are fewer metal molecules in this ocean world, Wen Yubai built a thick metal wall around the safe house given enough time.

As mentioned before, metal plates are different from metal meshes. Thick metal plates are not so easy to damage.

The metal fence that Wen Yubai built would take a long time to destroy even if a level 6 alien beast wanted to. If she continued to thicken it the next day or the day after tomorrow, it would be even more difficult to destroy it.

Moreover, if the metal fence is broken, she can just repair it. This only consumes her supernatural power, so every bit of energy that can be saved should be saved.

These metal fences also have another use, which is to prevent alien adventurers from hiding outside the safe house and attacking them.

Although there was a system that could tell them in advance, they were attacked as soon as they went out, and they still lost the initiative to some extent.

Wen Yubai cannot use his mental power to attack the outside world while in the safe house. If the level of the alien adventurer is too high, it may still be dangerous when he goes out.

When Wen Yubai was building the fence, another level 3 alien fish attacked them. She couldn't spare her help, so Pei Shibin was still responsible for dealing with the alien fish.

Wen Yubai observed those strange fish in her spare time. She didn't know whether to say they were fish or animals. Their heads looked like fish, but they had four legs. In short, they looked very eye-catching.

Before, Pei Shibin used sea water to strangle strange fish in the sea. Now that he is on the island, he uses wind blades to kill monsters, which can only be described as chopping melons and vegetables.

Fortunately, they can sell the corpses of these exotic fish to the bracelet mall, otherwise, in order to avoid being an eyesore, the two of them will have to find a way to destroy the corpses.

After Pei Shibin killed these strange fish, Wen Yubai also built the wall. She did not leave a door on the wall, but this could not stop the flying man at all.

"The strange fish that came ashore are not the same as the strange fish in the water. No, it should be said that the strange fish that came ashore have four more legs than the strange fish in the water. The body and head of the fish are still the same. Do you have any ideas?" Wen Yubai asked.

Pei Shibin gestured to go back to the safe house to talk, and Wen Yubai followed him into the safe house.

After the two of them sat down, Pei Shibin said, "I also asked the system, and it said that these strange fish did not swim up from the sea, but appeared directly on the beach, and then came in our direction. I think that alien civilization will send strange beasts or fish suitable for fighting in this environment based on our environment."

"Don't you think that these species, the strange fish in the water and the strange fish on land, don't seem to be products of nature?" This was the point of Wen Yubai's question just now.

"This is not surprising. Some of the strange beasts that appeared in our desert world did not seem to be products of nature. We, the people of the Blue Water Star, cannot do it, but it may not be a difficult task for these alien civilizations." Pei Shibin said.

Wen Yubai had nothing to say. The civilization of the Blue Water Planet was originally just a surface civilization and did not have the ability to go beyond the interstellar space.

Besides, the Blue Water Planet is now caught in a doomsday disaster. If it cannot survive the doomsday extinction, then there will be nothing left.

Even if we survive the crisis of extinction, it will take at least a long time to restore the original civilized society, not to mention the development of technological civilization.

The two of them thought about the Blue Water Star. After a long while of silence, Pei Shibin stood up and said, "You take a rest first. I'll go practice."

Wen Yubai nodded, looked at Pei Shibin's back as he walked into the practice room, and sighed softly.

After Pei Shibin learned that Shuilan Star would face an even greater crisis in two years, there has been an indelible heaviness between his brows, and he has been practicing so hard that he has almost become self-abuse.

Wen Yubai was naturally very concerned about the extinction crisis of the Blue Water Planet and tried her best. However, she was still far inferior to Pei Shibin in this matter.

"System, if you had been bound to Pei Shibin in your previous life, you might not have to start over again. This is the person who truly has the perseverance to save the world." Wen Yubai sighed.

"When I was created by the Lord God in my previous life, Major Pei had already met with an accident." The system spoke after a while.

"What you mean is that I'm not actually your first choice." Wen Yubai narrowed his eyes.

"Host, you are the one and only girl of destiny on the Blue Water Planet. No one can replace you." The system said hurriedly.

Wen Yubai actually just wanted to scare the system and listen to the flattery it hadn't heard in a long time.

Pei Shibin went to practice, and she was the one who kept watch. Since she couldn't practice, she could only tease the system. "After we went ashore, those alien adventurers were completely silent?" Wen Yubai asked the system.

"Those alien adventurers only leave the safe house when the alien fish attack, and they stay in the safe house during the same period. They seem to have no connection with each other, and there is no sign that they are observing us." said the system.

Wen Yubai thought about it and understood that the adventurers who had survived to this day had enough gold coins to unlock their original space grids.

Alien adventurers who have landed on this island do not need to upgrade their wooden boats if the safe house is available, so plundering supplies becomes less important.

By now, all alien adventurers should know that no adventurer who enters the ocean world is easy to mess with, and it is easy to be robbed and killed instead of being robbed.

This is most likely the reason why the alien adventurers on this island can live in peace temporarily. Another possibility is that those restless alien adventurers were killed by the alien adventurers now on the island.

However, this kind of thinking is probably only held by adventurers on the islands. Those alien adventurers who have not found islands or land and are still on the sea are going crazy because the level of the alien fish is increasing day by day.

Wen Yubai took a look at the number of surviving adventurers on the bracelet system. It turned out that the number had decreased by more than a thousand people today, which showed how fierce the infighting among the adventurers was.

Thank you for the tip from my fellow book friend Xinrenji.