According to the search and rescue team's calculation of the diameter of the island, if there is such a fast passage, a normal flyer flying from one end of the island to the other, according to the barrier-free flight speed, the total time consumed will generally not exceed one hour - that is, less than two hours.

Considering the inevitable obstacles, and the fact that you have to slow down inside the building, the whole time will also be within three to four hours.

Below this speed, the flyers cannot be said to be racing swords, but jumping - in very complex road conditions, it is far faster to rely on jumping to advance in space than with flying swords. They had already seen this on the Spirit Island.

Now, the search and rescue team has come to a conclusion that is completely contrary to common sense, both from the mouths of people who have lived in the building for more than 30 years, and from the current speed of movement of several searchers: the minimum time to complete the normal journey on this island is more than eight hours.

To know the speed of the flying sword, even inside the building, is quite amazing. Even at a conservative 60 kilometers per hour, the entire path would be more than 480 kilometers, and the diameter of the entire island would barely exceed 100 kilometers.

What kind of path can make four people from different directions, follow different routes, from one end of the island to the other, and travel far more than twice the normal path? - The conclusion is naturally simple, it is a detour.

It is not surprising if in one direction, there is a phenomenon of detours.

After all, it was the first time for their group to come to this island, even if the search and rescue team had the location information of everyone at all times, even if the search and rescue team could make a comprehensive judgment on the path they had walked, even if the search and rescue team could know the relative distance between the four people at any time and adjust it at any time - to prevent them from coming together unknowingly and wasting the search area. However, in the face of unknown road conditions, it is still normal to have a slight deviation.

But the search and rescue team arranged four people each time.

In a fixed three-dimensional space, starting from the same entrance and then exiting the same exit - with the search and rescue team's planning of the route, the itinerary of the four people is almost spatially symmetrical.

This also means that the average search efficiency of the last four people will definitely be close to an average. Generally speaking, this average should be a number that can be easily calculated according to the size of the space.

And in the island in front of them, four people acted in it according to the requirements of the search and rescue team, but they could not get out of the theoretical numbers calculated by the search and rescue team.

The reason is simple, the search and rescue team only needs to calculate the route of everyone a little, and they can easily come to the conclusion that there is an impassable area in the buildings on this island.

To put it more easily enough, the path taken by the four people is like walking along the six sides of a cube.

And everyone knows that in a three-dimensional space, the shortest path is often the line formed by connecting diagonal vertices.

This path exists on other islands, but here, it strangely disappears. Although the search and rescue team controls four people and tries to make a detour from four different directions like the central area of the island, these temptations always end up running into walls.

The short-haired man followed the guidance of the search and rescue team and finally stopped in front of a wall.

According to the search and rescue team, behind this wall, it is likely that something they are interested in is hidden.

The walls are ordinary, and they don't look any different from ordinary metal walls. In the Ascension Realm, almost most of the islands have such metal walls. Many islands can even see these exposed metal parts directly after the sand and gravel has peeled off outside.

In the core area of the Ascension Realm, which is occupied by many major sects, such a metal structure will be immediately controlled once it approaches the vigilant territory of other sects. Those who were inside would be expelled or even killed outright - because in the early days, there were examples of sects using these metal structures as cover to attack other sects.

There is no gravity in the Ascension Realm, and these metal structures are comparable in strength to flying swords - that is, these metals can almost perfectly resist the attack of flying swords.

For the flying people, this seems to be a natural battleship in the territory of Ascension. If this is analogous, then there is no doubt that the other major sects are aircraft carriers full of fighter jets.

Everyone knows that if a battleship approaches, even an aircraft carrier will not be able to withstand the direct fire of the opponent. Therefore, the best way to deal with these iron lumps is to directly eliminate and disintegrate them before they are close.

And the tools used to disassemble these metals...... A long time ago, in fact, it was just an ordinary magic weapon used for work in a sect, and it was more used for the interior renovation and decoration of the sect. And now, this kind of magic weapon has long been declared far and wide with a person, and this magic weapon has naturally become an artifact that everyone keeps secret.

The short-haired guest has lived in the Ascension Realm for more than 1,400 years, and there are countless types of magic weapons he has come into contact with. But the Qianyang finger in my hand today is the first time...... Not to mention, on the side of Qianyang's finger, there is also a void stone.

Although the light emitted by this piece of vanity is usually too dim to be noticed, in this completely dark world, it is still refreshing to watch.

The Qianyang Finger plus the myth of turning into a void stone has been six or seven hundred years since the appearance of the Samadhi real person. The short-haired man never imagined that he would one day be able to use this legendary combination in person—not to mention the Void Stone, even if it was a spirit stone, he had long forgotten the feelings and experiences of using it.

"Don't be nervous," the collection team saw the short-haired man's caution, "Qianyang Finger is a very intelligent tool...... Hold it up, align it, and place the Void Stone in your hand...... You can extract some aura first, because your cultivation is not high, and it is likely that the aura in your body will be drained in the moment of use......"

The short-haired man probably would never have thought that the person who commanded him in real time at this moment was the user of this legendary combination, Samadhi himself. The search and rescue team only acted as an intermediary with the help of voice.

With the activation of the Qianyang Finger, a faint red light appeared, and the short-haired guest found that the movement of the Qianyang Finger was not controlled by his own hands, but his own brain - the Qianyang Finger seemed to be able to read every operation instruction of the user and execute it accurately.

In front of the thin laser, the seemingly unstoppable metal seems to be like a cake cut by a knife...... After more than ten seconds, the cutting job is complete.

In front of them, a perfectly round metal plate of two meters in diameter had been cut - but it remained in its original place. However, the short-haired man stretched out his finger and gently pushed the round metal plate open, as if pushing open the door of a palace.

The light of Qianyang's finger had disappeared, and the surroundings were once again plunged into pitch black. But the dark vision of the flying man still allowed the short-haired customer to see what was behind the wall for the first time.

Nothing.

Moving the door behind him, the short-haired man no longer had any visual impairment in front of him, which allowed him to see more clearly what he had just seen.

Still nothing.

The short-haired man's eyes were already excited, and he almost subconsciously wanted to come out of the bag behind him with a flying sword...... But it was stopped by the search and rescue team.

"Wait," the search and rescue team said, "let me see first." ”

The short-haired man lifted the glass in his hand and pointed the non-glowing side at the place in front of him, where there was nothing.

Yes, as expected by the search and rescue team. Behind the walls, there is a huge space.

There is nothing in it except space.

No buildings, no people. No sound, no floating......

In front of the short-haired guest, a huge empty space appeared. He took out his Qianyang finger and adjusted the power to the minimum - the laser has almost no lethality at this power, and only serves as a visual indication and guidance.

The short-haired man controlled the red light, allowing it to sweep along the edge of the vast space in front of him - the air inside was clean, and the laser left no mark in the air, except for a faint red dot that was barely visible to them, far away.

The short-haired man's vision chased the red dot and soon sketched the outline of this huge space—a large square space.

After retracting the Qianyang Finger, the short-haired man almost couldn't wait to take out the flying sword behind his back, ready to let it carry him to this space to investigate on the spot. But the search and rescue team stopped him again.

"No," the short-haired man was a little confused by the words of the gathering team, "and there is no wind." ”

"No wind?"

What the search and rescue team was referring to was that there was no pressure difference between the two sides of the wall the moment they cut it.

Laser scanning can basically determine that the huge space in front of you is completely isolated from the outside buildings. In other words, the entire building complex outside can actually be counted as the shell of this square space. If it is really completely closed - then after such a long period of isolation, there will inevitably be a pressure difference between the inside and outside of the room.

In the Ascension Realm, the Flying Beings still need to breathe, and since they need to breathe, they naturally need to consume oxygen - the oxygen content in the air of the Ascension Realm is about 33 percent - nearly half more than that of the Earth.

At such a high oxygen content, in general, metals will inevitably react with oxygen.

This is the approximate conclusion that the search and rescue team has reached through the testing of metal samples.

Although the metal technology used by the aliens has excellent performance in resisting corrosion - as long as this world is still in the same universe as the earth, sharing the same set of physical laws, it means that as long as the material, no matter what the formula, how strong, will always have some reaction under the action of a long time.

The main component of these metals is an alloy dominated by aluminum and titanium, which is excellent in terms of oxidation resistance – but it is inevitable that the properties of the metal will weaken after 1400 years of erosion.

In other words, if this is a truly sealed space, then oxygen will inevitably react with the metal to produce solid oxides – the air pressure inside will definitely be lower than on the outside.

In this case, the moment they open the door, this negative pressure will definitely have a suction force on the person.

But the short-haired customer just now didn't feel this pressure difference at all. The short-haired man remembers very well that after the cut was completed, the entire cutting surface was barely motionless - and finally he pushed it away with his hand.

This means that this seemingly confined space actually has a channel to communicate with the outside world – but ...... They had already scanned it with a laser, and even the short-haired customer used the bright flashlight they had brought with them to confirm it again.

The whole square area is indeed fully enclosed.

"Try to control the flying sword and fly it alone...... Slow down," the search and rescue team said to the short-haired man, "you guys stand back." ”

The short-haired man didn't understand what the search and rescue team meant, but he complied anyway. Less than a few seconds after the flying sword flew out, he understood the purpose of the search and rescue team - the flying sword was gone.

In front of the short-haired man, with his eyes firmly fixed, the flying sword disappeared as if it had been melted into the air.