In the days that followed, more than 100 species of creatures crossed the river, nearly half of which were flying creatures of various sizes, ranging from large birds of prey with a wingspan of more than 10 meters to small birds of prey with a wingspan of less than 10 centimeters. On the ground, it was much more lively, with big men who could jump seven or eight meters at once, animals with only two feet and no forelimbs taking cheerful small steps, and even species with no limbs all over their bodies, turning left and right on the ground. When Hongjun saw this strange species, he called a group of people who had nothing to do to watch, among which Feng Lixi was the most interested, and even turned his legs into the appearance of that animal after a closer look. Kazari used her conjured tail to drag on the ground, which seemed to be easier than moving on her legs, and she was able to stand tall without the help of flying, and she ran on the ground for days as if her upper body was human and her lower body was tail.

However, Hongjun was more curious about why so many different species were running south here, and Patian tried to match them, and found that there was a high degree of matching. Patian's explanation is that most of the animals on this planet are very sensitive to temperature, and the temperature adaptation range is relatively narrow, and even a little low or high point cannot survive. Under the temperature changes caused by the season, they have to chase the right temperature to survive. It is now autumn, and the north is starting to get cold, and the animals that are not suitable for the cold at this time have begun to migrate to the warmer places in the south.

After hearing this, Hongjun sighed that this world is really diverse, and in the eyes of himself and others, the temperature that does not matter can cause a huge number of species to migrate even if it changes by more than ten degrees. Seem... This migration of species is also beneficial to the development of the species themselves, but it allows them to have a wider range of distribution, and under the right conditions, it will naturally produce more species populations. But... It seems that it is not good for humans or other species in cold regions, and species migration means that the number of rings in the middle of the food chain will decrease, and the total amount of food will also decrease simultaneously, making it more difficult for animals in the upper strata to obtain food. Thinking of this, Hongjun once again felt the two sides of things.

After fifteen days have passed, the various reserves in the Heavenly Palace have been very large, and the next thing is just to replenish some species that have not been seen before, and leave some samples after distinguishing the useful and useless. Therefore, the speed of Tiangong also began to increase.

According to Patian's account, this year marks the 242nd day of more than 2.11 billion years in the world calendar. It was really that the string of numbers reported by Patian was too long, and Hongjun had a headache when he heard it.

The world in the north has begun to get colder, although it has not yet reached the coldest moment, those prescient animals have already run to the south, and Hongjun has seen no less than a hundred species in the past ten days.

On the two hundred and ninety-sixth day of the year, Taishang and the others had already been sent down to contact the tribes they had discovered, and most of the more than twenty tribes found were humans with a similar appearance to Sui, but Hongjun found that the closer they were to the north, the whiter their skin seemed to be. In addition, they have different levels of technology, and the same thing is that they have not mastered the use of fire. Strangely enough, a few tribes have built thatched huts, while others still live in trees. While most beasts are not a threat to humans in the trees, they are not as comfortable or agile as caves.

After the disciples of the three Taishang were taken by the master to practice one tribe, the ten people selected ten smaller tribes from them and began to teach them separately, and after accumulating enough experience, they were teaching the larger tribes. Everyone took refuge in the past as members of other tribes, and then gradually and imperceptibly transformed. And those tribes that are too small are not qualified to be taught, and it is really impossible for every tribe to teach. According to the agreement, the Heavenly Palace will stay here for a month, and they need to teach them the use of fire at least for a month, and the others will be targeted according to their own circumstances, but they cannot be the same.

During this month's waiting, Hongjun and Feng Rishi came to a huge inland lake in the north, which was more than 100 kilometers wide and more than 500 kilometers long from northeast to southwest. The northern part has been covered with snow and ice, and the southern part is still verdant. Hongjun, who had eaten all the sea fish, suddenly wanted to taste the taste of freshwater fish, so Hongjun took people to the north, and the eighteen maids generally do not go to places outside the Heavenly Palace, so with the help of the four people surnamed Bai next to him, Feng Lixi built a delicate grill, and then put the seats and tables on Hongjun's side, and several people ate and made trouble. They are not afraid of high and low temperatures. Hongjun is still a simple white robe, scattered at will under the cold wind, looking dusty and elegant.

In the midst of Bai Xi's singing, Hongjun and Feng Rixi sat behind the desk together, drinking high-quality wine, while listening to Bai Xi's beautiful and crisp singing songs taught by Patian, while complaining about why there were so many spines in this freshwater fish. Suddenly, Bai Xi stopped abruptly, but Bai Ze pulled out his short sword and shot it in one direction. Hongjun and Feng Lixi were stunned for a moment, because of their confidence in their own strength, they didn't pay much attention to the surrounding environment, but Bai Ze and Bai Xi kept emitting their breath for hundreds of meters, always paying attention to the movements around them, but they were not afraid that anything could hurt the lord and the master, but they were afraid that something would be abrupt to the two of them.

It took Bai Ze less than a second to rush to the strange creature in front of him, put the short sword on the creature's neck, and in the next second, the short sword split in two, pointing at the foot of the creature in front of him.

Hongjun came to the front and found that these were two creatures one tall and one short, which seemed to be also standing, but they were wearing fur of different thickness and pattern, Hongjun gave Bai Xi a look, and Bai Xi took off the robe made of several animal fur from the creature, and a human with a height of about one meter and six appeared there.

Hongjun was surprised, first of all, he was surprised that his height was much taller than Sui's, second, this person was actually wearing full body clothes, although it was made of fur, and even held a mask made of the skin of a large animal in his hand, and third, he was surprised that there were humans in this already cold place.

At this time, the man held the child lying on his feet tightly in his arms, looked at everyone vigilantly, and said something in his mouth, as if he did not understand the language of the Sui tribe. Because Hongjun didn't hear a similar pronunciation. The child was also wearing thick fur, but it was all white, and it was difficult to find the traces of the two with simple vision against the background of the snow, and if it weren't for their breathing and heartbeat revealing their location, it would have been really difficult to detect the existence of the two of them.

Hongjun's eyes rolled, and an idea came to mind. Hongjun first asked Feng Lixi to take the rest of the grilled fish, but Hongjun didn't like this kind of long flat fish very much anyway. Placing the grilled fish in front of the two of them, Hongjun led everyone to pack up their things and head south. Sure enough, after the two men put away what seemed to be edible, they put on full clothes and quietly followed them under the cover of the snow.

After that, Hongjun quickened his pace, and soon, the two found that it seemed difficult to catch up with the six people in front of them without revealing themselves, and after stopping, they waited for an hour, and found that the six people did not turn back and began their return journey.

Hongjun asked Feng Lixi and them to go back to the Heavenly Palace first, and they wanted to go over to have a look, Feng Lixi was relieved, no matter how he said it, he had to let Hongjun take a few people and go again, and after a while of bargaining, Hongjun had to take Bai Ze and walk in the direction where the two disappeared.

After walking for a while, Hongjun suddenly stopped, looked at Bai Ze a few times with Bai Ze's eyes that he felt a little squinting, and with a wave of his hand, Bai Ze was changed into a plush white one-piece coat, and even a plush tiger hat on his head, and the whole body was snow-white. Hongjun nodded with satisfaction and said, "You won't hide your breath, just disguise it like this first."

After speaking, he took Bai Ze and quickly followed the two people in front of him to the north.

After walking for nearly three hours, the two people in front came to a location at the foot of a mountain, and Hongjun had already found that it was standard for these primitive humans to live in the mountains. The difference is that it is snowy and cold, and if they live in this environment, they are afraid that they will not last more than three days and will all freeze to death. The people here were dressed in thick animal skins, and the place where they lived was also made of wooden fences, and they cleared all the snow from the fences, and there were a dozen white tents in the clearing, all made of animal skins, and Hongjun did not understand how they had obtained so many animal skins in this seemingly desolate place.

Late at night, Hongjun and Bai Ze squatted more than two hundred meters away from the camp, observing the human tribe located in the extremely cold zone. It can be clearly seen that there are several dark sentinels around the camp, they hide in the dry trees and disguise, and even the mouths are masks made of two layers of animal skins, so as to hide the white mist brought out by the cold breath, this camouflage may have some effect on the beasts, but for Hongjun and Bai Ze's eyes, it is as obvious as the sun in the night.

This is the second wave of dark sentinels, these are the first wave replaced at midnight, such a tight state of vigilance is unimaginable in the Sui tribe, it seems that the environment here is not very safe.

The next morning, when the first sun of the morning shone upon them, they were all assembled, and there were about thirty of them, and they grabbed a handful of snow from the vicinity, and ate the meat of an unknown animal, which was their breakfast.