From the very beginning, they were planning to find this advanced civilization and get some technology that could allow them to survive, although they went through many detours, but now they are finally on the right path. However, in order to get what they expect, the price is not small.

At the beginning of their plan, they didn't expect that this civilization had already perished, and before that, it was simply unimaginable, a civilization that could build a space wormhole would actually perish in a few hundred years, but in terms of time, it was definitely not a normal demise.

Hundreds of years of time, in the eyes of ordinary human beings, is a matter of several lifetimes, but from the perspective of the course of the universe, this time can be compared to the "second" in human time. In the universe, the common unit of time is 100 million years, and it has taken hundreds of millions of years to get to this point.

These hundreds of years in front of 100 million, there is simply no way to compare, you know, without the speed of light, the distance they travel is calculated according to how many years the light travels, which is the origin of "light years", a distance unit, but also contains the existence of time. Just walking for a year, just thinking about it, you know how hungry the distance is.

Lightspeed ships are an exception, because they have reached the speed of light, their own time has been distorted, and there is no way to compare the time they experience with the time experienced by others. Two different timelines are simply and easily manufactured.

The theory is very simple, but it is quite difficult to practice what you really want, even a person like Liu Xuan, who has studied thrusters for half his life, still has no clue about this light-speed spaceship, let alone how to use it. These may be problems for future generations, but the earth is already in some crisis in their time.

These are all later words, if human civilization is given a certain amount of time, it is definitely possible to create this kind of spaceship, Liu Xuan has always believed in the potential of human beings themselves, and also believes in their own potential, but what they lack now is time. It's just that they don't have time to develop quietly, and that's the other way.

What happened to the current earth civilization, whether they survived or not, these are temporarily unknown, their time distortion has exceeded their own expectations, maybe it is a little late to get these technologies now, but their hearts are still there, as long as they have advanced technology, they still have a chance to survive.

For how to find some technology, Liu Xuan and the others did not worry too much, the reason is very simple, even if it is a level of technology like the mysterious planet civilization, there is a way to leave something in their own crisis moment, and even contacted Liu Xuan, they also have reason to believe that although this advanced civilization is extinct, but some information is still worth looking for, in fact, in essence, this is no different from "tomb robbery". The only difference is that they may be the biggest "tomb robbers" in human history

Thieves", other tomb robbers are stealing the tombs of their ancestors, but the four of them are stealing the "tombs" of an advanced civilization, and their purpose is technology, not money.

Among civilizations, the most worthless thing may be the "money" itself, even if it is a precious metal, for some advanced civilizations, it is also unattractive, in their eyes, precious metal is just a raw material for the production of parts, and the technology contained in it is the most critical.

Human civilization is also far behind in this regard, or in other words, the general equivalent of money, when it is less and less valued, it is to show the degree of development of human science and technology, and the beautiful society that people yearn for is also built on the society without money, "distribution according to need" is a stage of civilization development, compared with other advanced civilizations, this is only a low-level stage.

The last day, they also spent it very casually, after a month of sailing, the growth of their knowledge also brought about the growth of their minds, the four of them, including Liu Xuan himself, all thought that they had seen too many civilized graves in a month's time, and their mood was also calm. When they thought that they would not be surprised to see the grave of such civilization, their final destination was reached.

Just like the original, there was something that emitted a faint fluorescence in front of them, just like the situation of seeing the tombs of other civilizations in the past, they had seen too many such things in this time, and when they suddenly saw it at this time, they couldn't attract their attention.

On top of the instrument, the value has been reduced to tens of digits, of course, the unit of this instrument is an astronomical unit, and a number represents an astronomical unit, that is, the distance between the sun and the earth. The instrument was telling them that the fluorescent thing in front of them was their final destination.

"Looking at the mountain and running a dead horse" is an ancient saying of the earth's civilization, and it is also very appropriate to use it in this place, although it seems that the fluorescence is already very close to them, but it also took them half a day to sail, and finally it is close to the advanced civilization that they think about day by day.

Just at first glance, they were completely shocked, a word, big, that is also a planet, a huge planet, huge seems to be synonymous with itself, in the distance it seems to be a small fluorescence, to the front of them to know, how naïve they are, how can a planet of advanced civilization be so ordinary.

This size is not the size of the planet itself, but the size of the planet after their transformation, because on the planet, there are many floating rope-like things, of course, they seem to be the size of a rope in this position, but if it is really a normal size, it is definitely bigger than their starfighters.

On the top of these "ropes", there are also some things, Liu Xuan feels it, this thing itself is like nature, the planet is a huge seed, these "ropes" and the things connected to the top are all plants that grow on this seed, of course, just by the naked eye

It can be seen that these things are all built by highly intelligent life forms, but they look like plants grow in the same way, which is somewhat magical.

They are used to seeing the tombs of other civilizations that are ordinary, and there is nothing new, and the sudden appearance of such a situation is also very surprising to them, they never thought that there would still be such a development, but this is indeed a good way to enter space, those ropes should be the "planetary elevator", from the surface of the planet into this thing can safely reach the space station in space, saving energy and at the same time more safe.

From the leader, I learned that this civilization has been completely extinct, but only on the surface, this planet is still very intact, and there is no sign of any blow, as for the surface of this planet, they still can't see it for the time being, after all, such a powerful planet definitely has some kind of protective shield.

Suddenly, Liu Xuan understood one of the uses of this protective shield, that is, to isolate the leakage of his own civilization, of course, this is not something that has been done by an extinct race, it is very likely that another powerful race has done it, they don't want some advanced technology to be developed and imitated by some people very easily.

This is like the mechanism in the ancient tomb, set up in order to prevent the good things in it from being "stolen", and the isolation danger they originally inferred is probably only one of the effects, so it seems that the civilization that can cause this dark space must be quite powerful, so strong that they can't understand the intention of some of their practices.

However, at this time, the problem also appeared, in order to obtain some technology, they must reach the surface of this planet, but with the existence of this protective shield, the chance of them entering the era is simply minimal, and it is not an exaggeration to say that it is zero, in the eyes of the civilization that sets up this protective shield, the earth civilization may not be much stronger than an ant.

However, everything has to be tried to know the final result, practice is the only criterion to test the truth, when they came this time, the number of unmanned exploration spacecraft they brought was very considerable, even if they had already used a lot, the remaining number was definitely enough for them to use.

The small unmanned spacecraft was launched, flying towards the surface of the planet, just as they expected, almost just approaching the periphery of the fluorescence, this small unmanned spacecraft exploded instantly, there was no chance to react at all, and there was no attack at all, and it seemed that it was just crashed.

At the beginning, they still had some luck in their hearts, hoping that there was no protective shield on this planet, but now they are a little desperate, no matter how much they comfort themselves, they can't change the objective fact of the existence of the protective shield, fortunately, they don't have much hope in the first place. The greater the hope, the greater the disappointment. After this impact, they have already collected some data.

The next wave of unmanned spacecraft was also launched quickly, this time it was different from the last entry location, but the result was the same, it was still completely destroyed, even if it was broken

The film was also completely destroyed by this fluorescent shield, leaving nothing behind, and this shield was much more powerful than they imagined.

Liu Xuan still felt a little afraid, it seems that the mysterious planet civilization has not been destroyed for a long time, this is why there is no such thing, if the mysterious planet also has this kind of thing at that time, they really can't get anything, they can only wait for death in the sky above the mysterious planet. Liu Xuan is also afraid of imagining it now, if he and Wang Meng are trapped on that mysterious planet, it will be even more tragic.

But after all, these didn't happen, Liu Xuan was just blind and afraid.

How to break the protective shield in front of you has become a very tricky problem.

Before and after, they released a total of more than ten unmanned spacecraft for exploration, from various positions, different angles of entry attempts, but the result is the same, the unmanned spacecraft have all been completely destroyed, and even the residue is left.

They have tried to obtain as much data as possible, but their technical level is limited, and after boiling, they have only found two conclusions. First, no matter which angle you cut into, the result is the same, the fluorescence itself is completely above the planet, and at present, it seems that it is 100% completely covered. The second conclusion is also obvious, the energy strength and scientific level of this shield are far stronger than theirs, but according to their technology, it is impossible to forcibly break through this shield, even if it is a gap with a diameter of one centimeter.

This is the conclusion that they have been busy for most of the day, it has been a day when they have arrived at this place, they have gone through a lot of tests, everything they can think of, they have tried, and the results without exception have ended in failure.

The four of them sat slumped in the lounge, looking at each other speechlessly, the originally very tidy lounge was already occupied by a lot of paper, some functions of the computer were interfered with, and they also took out their own computing power, but the result did not change, and in the end, they had to admit that even if they directly hit this protective shield with the Explorer, it would not be able to shake it. That's a shield that covers the entire planet.

Liu Xuan also sighed in his heart at this time, even if he couldn't get in, it would be enough to give them the technology of this protective shield. If the earth civilization has such a strong protective shield, what else can they be afraid of, this is an absolutely powerful and durable turtle shell, there is no level of fifth-level civilization, and other civilizations cannot attack it.

Now they are like this, they already have the technology in front of them to protect the safe development of the earth's civilization, but they lack a key, a key to bring the technology out, and the leader of the mysterious planet did not tell them that in front of this huge scientific treasure, there is still such a powerful obstacle.

The nature of human beings is very tenacious, even if they didn't succeed the first time, the four of them didn't give up, although the data told them that it was impossible, so they tried to solve the problem, this planet is good

Ran, it has become a high-tech computer with super defense, and the four of them are hackers, seeking even the slightest opportunity to enter this computer and get the scientific treasure that they always covet.

Time passed like this little by little, divergent thinking is quite a good idea, in some scientific research and exploration is also very commonly used, they are now to think of some unusual ways, at the beginning, the four of them will work together, each of them is a whole, think of some ways by themselves, try by themselves. Four people, each of them thought of a way, that is, four ways, and their chances of breaking this protective shield were also greater.

Ideas may be beautiful, but the truth is always cruel, in the face of absolute power, wisdom seems so powerless, even if they themselves think of a variety of ideas, but the implementation is not successful, this is like ants can't shake the elephant, that sense of powerlessness makes them quite a headache.

Time flies quickly, five days have passed in their busyness, they have been coming to this place for nearly a week, but they have not gotten anything, and they have been exhausted by repeated attempts, and it is even more difficult to accept that every attempt is a large consumption of resources, and the materials they carry have also been severely consumed.

Expenditure and income are completely disproportionate, they have lost a lot, ten percent of the materials have been consumed in five days, but they have not gained anything, even if the materials are released, there is no way to recover, the moment they touch the shield, all the substances are vaporized, including the metal that they think is very strong.

No matter how you look at this shield, it is a highly compressed star, although the brightness is not high, it is only a fluorescence level, but the temperature is not low at all, and it is difficult for them to imagine how much this shield consumes in a day.

Liu Xuan also thought of other possibilities, this protective shield itself is just a surface, just a detection device, what really destroys their unmanned spacecraft is something else, otherwise they can't understand the consumption of this device at all. For this reason, Liu Xuan also conducted an experiment, two unmanned spacecraft hit the shield at the same time, and even more unmanned spacecraft hit the shield at the same time, but the result was the same, no matter what the number was, it would disappear and vaporize instantly.

Although this does not show that Liu Xuan's conjecture is wrong, it tells them that even if Liu Xuan's conjecture is correct, they have no way to use this conjecture. What's more, at present, I don't know if what Liu Xuan thinks is right. It really stumped them.

Four people work separately to try to conjecture together, each plan complements each other, the four of them are like returning to the research laboratory on the earth, studying feasible solutions, but each one is a failure, no matter how to calculate, how to implement, it is useless, in the face of a powerful civilization, they are just a bug!

Two weeks passed, and the four were clearly exhausted. There was no way for them to open the shield and enter the civilization, and the paper they carried was all depleted, and there was still no progress.

The treasure is in front of you, but you don't get the key, which is quite uncomfortable just thinking about it. After going through so much, they don't want to be declared dead like this.

"I'm so hard!" Liu Xuan looked at the fluorescent protective shield outside the window, and said helplessly.

(End of chapter)