It wasn't until the sky was already dark that Lu Yu walked out of the Internet café with a confused face, and through the Internet, all kinds of weirdness and doubts in his heart today had answers, letting him know that this world was very different from his original world, he was not reborn, nor was it traversing, it was more like a mixture of rebirth and traversal.

For example, the characters around him may not have changed much, and it looks more like being reborn.

But there is one more profession in this world, and that is the martial artist that everyone has repeatedly mentioned today, yes, it is similar to the martial artist in martial arts novels.

It is said that the powerful warrior burned the mountains and boiled the sea, and it was not a problem to open the stele and crack the stone, and he also deliberately watched the live broadcast of a second-level martial artist on the live broadcast website, and it was effortless to break a bluestone slab with a thickness of 20 cm with one punch.

This is only level 2, and it is said that the warrior can reach level 9 at most, and the warrior of level 9 is a personal nuclear bomb, and it is easy to open mountains and rivers, and it is the most important strategic weapon of every country.

Moreover, martial artists have penetrated into all aspects of various industries, and even the law clearly stipulates that national civil servants must be martial artists, and the minimum requirement for low-level civil servants is a late level 1 martial artist, even if it is an ordinary soldier, the minimum requirement is also a level 1 martial artist.

Of course, if it is a private enterprise, there is no such restriction, but some well-known enterprises or large multinational companies also have requirements in terms of recruitment, and those who are not martial artists are not considered.

High-level martial artists are very popular in various industries, even if they don't do anything, they just make their names in some companies, and their income is considerable, which makes Lu Yu drool.

As for why this world attaches so much importance to martial artists, it is not without reason, it turns out that since about two thousand years ago, a kind of otherworldly passage similar to a space-time rift has appeared almost simultaneously in various parts of the world, and a large number of otherworldly creatures have poured into the earth through this channel.

These scaly humanoid otherworldly monsters, with hard bodies, sharp claws and fangs, are cruel and bloodthirsty, whether they are living animals or humans, as long as they encounter flesh and blood creatures, they will be killed and devoured.

Since then, humans have put aside their cannibalism and turned to work together to resist the invasion of otherworldly creatures.

However, the war is unimaginably difficult, the otherworldly creatures are extremely powerful, and after decades of tragic fighting, there is not one in ten human beings, and there is a lot of mourning.

During this period, countless heroic stories have been sung and cried, but human beings rely on their indomitable tenacity and determination to see death as home, and finally drive these monsters back to the passage of another time and space.

However, before humanity had time to celebrate the victory that had been ushered in so hard, they found that those passages in different time and space could not be closed or blocked by any means, which meant that humanity could face the invasion of monsters at any time.

Therefore, the ancestors of mankind while recuperating and studying the martial arts to be passed on to future generations, while boldly exploring the passage of different time and space, in order to find a way to close the passage and solve the aftermath of the monster invasion, in order to prevent this misfortune from befalling future generations.

However, until today, nearly 2,000 years have passed, and the passage of different time and space has not been closed, and monsters may still wreak havoc on the earth at any time, and even every two hundred years or so, there will be a batch of more entrances to the passage.

For example, in the Huaxia country where Lu Yu is located, there was only one passage entrance two thousand years ago, and today 2000 years have passed, and there are already 9 passage entrances, and according to the law calculation, the 10th passage entrance is about to appear. Every time a new passage entrance appears, it is a great disaster for humanity.

However, after two thousand years of warfare and exploration, people have not gained nothing, and through exploration, human beings have discovered that the other side of the passage of different time and space is also a real world, with mountains, water, air, night and day, plants and animals, which are generally not much different from the earth.

But there are also some places that are different, such as that world has no humans, only this human-like monster and some powerful beasts, this kind of monster is very powerful individually, even the lowest-level ordinary green-skinned monster, which is equivalent to the strength of human level 1 to level 3 martial artists. Depending on the shade of their skin color, it's easy to tell.

There are also red-skinned monsters on top of the green-skinned monsters, which are equivalent to human level 4 to 6 warriors, and finally there are purple, brown, and black monsters, which are equivalent to human level 7, 8, and 9 warriors. Monsters of each color are easily distinguishable according to the shade of skin color.

For example, the lowest-level 1-level monsters, their skin is light green and a little yellow, the skin color of the 2-level monster is similar to the leaves and grass, and the color of the 3-level monster is like the dark green of the winter melon skin.

Level 4 monsters are pink, level 5 monsters are bright red like blood, and level 6 monsters are crimson like blood clots.

The color of the level 7 monster starts to turn purple, the level 8 monster turns brown, and finally, the level 9 monster is completely black. These monsters have sharp claws and fangs, are extremely fierce and infinitely powerful, and their speed is extremely fast, even without weapons, they are not weaker than human warriors at all, and even stronger than warriors of the same level.

The only thing to be thankful for is that their intelligence is not high, and they rush up like swarms when they are fighting, and there is no battle formation or anything like that. But through so many years of fighting with humans, they have also learned some things, such as making simple weapons, city walls, and houses, although there is no human social order, but it is much more advanced than two thousand years.

In addition to this humanoid monster covered in scales, there are many powerful animals in the other world, which are similar to the animals of the earth, they are not very intelligent, and they live in the wild jungle.

However, unlike the ordinary animals of the earth, these animals generally possess all kinds of powerful powers and incredible abilities, and fortunately, these animals are neutral, they attack the humans they encounter, and they do not let go of the sub-human monsters with scales.

People call this monster a monster, call the sub-human monster with scale armor a demon, in order to resist the invasion of the demons, after countless tragic battles, countless ancestors sacrificed, human beings finally established a base city at the entrance of each other world.

This is a difficult but great victory, occupying the passage on both sides, and completely holding the passage in their hands, humanity is equivalent to grasping the initiative in the war.

The reason why it is so difficult is because after human beings reach the other world through the passage of the other world, you will find that there is nothing left on your body, you can't bring anything with you, you can't even take the clothes on your body, and Hongguoguo crosses into the other world.

Later, after human research, it was discovered that only clothes made of materials such as plant or animal fur from other worlds could be brought over, and this discovery was great, at least not in the other world.

The same goes for weapons, weapons made of materials in the human world cannot be brought over, they will remain on the earth when they pass through the otherworldly passage, and only weapons made of otherworldly materials can be brought over.

After entering the modern era, some people once proposed to put the demons on the earth and destroy them with thermal weapons, and for this reason, they also made an experimental war at the entrance of a deserted passage, and put the demons on the earth, intending to destroy them with thermal weapons.

The result is chilling, hot weapons are really useful for demons, but the effect is limited, a rifle can't even kill a level 1 demon, even if it's a missile, the damage to the intermediate demon is limited, their scale armor is very resistant to thermal weapons, and after the blow of thermal weapons, this resistance will gradually increase, and then thermal weapons are useless to them at all.

However, humans still have a killer weapon, that is, nuclear weapons, so they dropped a nuclear bomb at the mouth of that passage, and the result was that the low-level and middle-level demons died, and even the high-level demons of level 7 did not survive.

But although the 8-level 9-level demons were injured, they survived tenaciously, and the most incredible thing is that these eight- and nine-level demons were mutated after being bombed by nuclear bombs, and in that battle, there was only one level 9 demons and two level 8 demons, in order to eliminate these three demons, human beings paid the price of 7 level 9 powerhouses and 10 level 8 powerhouses.

The loss of this battle has made the human race break its bones, you must know that there are less than 100 level 9 powerhouses on the earth, and the loss of nearly one-tenth at once is simply an unbearable price.

From then on, no one ever mentioned putting the demons on the earth to fight. Wars can only be fought in the Otherworld.