There are still many unexcavated mythological relics on Earth, and if they can't get by, they won't be able to get them.

Moreover, they also need human beings to assist in the study of the mythological civilization of the earth, and now most of them are isolated, even if they have captured some of them and brought them to the wilderness, but the number is too small, and the strength is not strong, how can they compare with so many people on the earth?

What they are most afraid of is that the earthlings will take the opportunity to develop, and with the potential shown by human beings, it is estimated that it will not take a hundred years to catch up with them, and it is likely that they will not even be able to compare with them after a thousand years.

Based on these considerations, they very much want to return to Earth, on the one hand, to monitor the development of the human race on Earth, and on the other hand, to study mythological civilizations with the help of some human traitors and some research results of humans.

After trying for a while, they found that they couldn't get by, and they had to show kindness to the Terrans, and began to make gentle contacts, wanting to make a detour.

For these, Xiao Mu had expected it for a long time, and he didn't care about it, but ordered to kill one by one, and was not in a hurry to trade.

He left a clone to deal with all kinds of miscellaneous affairs of the Federation, and the main body came to the White Bone Blood River to cultivate.

The sea of blood here is completely a special cultivation, he can directly absorb it, and his cultivation speed is more than ten times faster.

The Blood Spirit Technique, which had just entered the sixth layer, quickly condensed a large amount of Origin True Blood with the assistance of these resources, and began to enter the hall.

When enough Origin True Blood is condensed, his cultivation in this realm can be regarded as a great achievement, and when the time comes, he can begin to condense his blood.

Once the blood spirit is condensed, he is comparable to a seventh-order emperor, and even if he goes to a wild land, he doesn't have to be afraid.

In the following time, the environment of the entire human race gradually tended to be relatively stable, and in this environment, martial artists were constantly born, making the number of human cultivators more and more.

At the same time, human beings continue to implement plans to encourage fertility, and it is necessary to take advantage of this rare time to increase the number of human beings.

Only with enough human base can more warriors be born, and as for resources, with today's aura, plants are far more lush than in the previous Earth era, and the food output is also large, enough to give birth to more human beings.

Moreover, the Antarctic continent, which was originally unsuitable for survival, has also been vacated enough to accommodate billions of people.

Therefore, there was a lot of pressure on the 10 billion people on the earth in the past, and with the current environment, there is no problem to withstand 20 billion people, and more warriors can be cultivated with insects and fruits.

With a population of 400 million, there is a lot of room for development, and it is estimated that fertility planning will continue to be encouraged in the next 50 to 60 years.

However, with the increasing number of people, the pressure on resources still exists, so the desire of human beings to have children has decreased a lot, so that the fertility rate has also declined.

Of course, within a few days and ten years, the fertility rate can still be maintained at more than 5 percent, and at this rate, it will not take a hundred years for the population to recover to 10 billion.

It's just that if the alien race kills again, the more people there will be, the more people will die, which is inevitable.

In order for human beings to become strong, there is only one way to do this, and the more people there are, the greater the possibility of giving birth to strong people.

With the birth of more and more infants and toddlers, the education system has developed rapidly, and a large number of schools have sprung up, and in addition to junior high and high schools, which lay the foundation for cultural knowledge, the martial arts academy and martial arts university specializing in training martial artists have also expanded rapidly, and more and more students have been trained.

These new generations are the mainstay of future human beings, and these generations have caught up with the changes of the times, received a lot of resources, and there will be many people who will enter the upper class society and become nobles and families among human beings.

With the accumulation of capital and force, as well as the frenzied reproduction of offspring, human beings will inevitably form many big families in the future, and it will be more and more difficult for ordinary people without power to rise.

Moreover, due to the importance of technology and martial arts, it is not surprising that if human beings in the future want to become human beings, they will either master advanced scientific and technological knowledge, or they will become martial artists.

Obviously, the status of a warrior will be more noble, and it is also a path to change fate.

Xiao Mu can see these developments, so he supported the military department in advance and formulated a series of rules to leave some more roads for ordinary people.

When Xiao Mu was cultivating and the human race was multiplying, the movement of the alien race did not stop for a moment.

After being killed by humans after they specially sent their men to show goodwill, they sent a large number of aliens to other spatial passages in a fit of rage.

There are a lot of these alien races, and outside each passage, there are 100,000 level alien troops rushing into the spatial passage in turn.

The exit of the space passage on the human side has alien races coming over every moment, and the pressure on the human defenders has increased greatly, but fortunately, the passage volume of the spatial passage is very limited, even if there are hundreds of alien races coming over a day, they are separated at different time periods, and they can completely surround and kill them.

In addition to this method, they are also hurrying to find new spatial passages, if there is a passage that is not discovered by humans, they can secretly gather an army and directly wipe out the human race with an army of millions.

In addition, they hurriedly studied the formation of stabilizing the space channel, hoping to combine the mythological civilization of the earth to find a way that could be done once and for all without being blocked by humans.

Ten years later, the human population exceeded the billion mark, and in the vicinity of the thirty-six cities, one after another subsidiary cities were established to accommodate the surplus population, and at the same time they themselves were greatly expanded.

Within the human race, no matter how a new generation of masters emerges, among the top masters, Yang Miaoyin has unexpectedly become the third king of the human race in the yang world, and there are two more who have successfully broken through.

There have also been a lot of gains in the research of the six-armed gods and demons in the technology of warships, which has made the scientific and technological level of mankind improve by leaps and bounds, and weapons that can threaten the fourth-order alien race have been developed, and weapons that can threaten the fifth-order have also begun to be studied.

In addition to weapons, in other aspects, especially human life, it has been isolated and changed a lot, and a large number of genetic drugs have been manufactured, helping many people to become warriors.

Moreover, there has been progress in the basic research of human fusion aliens, breaking the barriers between different organisms, so that human genes can absorb some alien genes and thus gain great power.

It's just that these genes have obvious side effects, and only ordinary people will try them, and they are not recognized by martial arts families, and they have little impact for the time being.

Xiao Mu summarized the sixth-order martial arts, forming a complete cultivation path from an ordinary martial artist to a martial arts king, and the human martial arts were initially perfected.

When humanity was growing rapidly, the alien race still did not give up and wanted to kill it again.

It's just that whether they continue to send their subordinates to try through the spatial passage, or find new spatial rifts, they have failed.

However, there has been some progress in the space formation they have studied, but they are still far from directly opening the space channel.