After the departure of the Boilers, the trading area was officially closed, and although there would also be warriors from Yanjiao guarding the trading area for some follow-up transformations, it was no longer open to the public, and they would close it for a winter in preparation for an even grander trade in the coming year.

The sky began to snow, but unlike the blizzard-like winter they had experienced here, this winter seemed more normal. Perhaps, after the catastrophe of heaven and earth, the geographical environment has changed, and the weather has changed accordingly.

After two more weird hot winters, this year, people on the mainland finally ushered in a normal winter.

Perhaps, further in the mountains and forests, there will be some warm places, places where the birds live, but the people on the mainland do not yearn for it, and all they expect is a normal winter.

After Shao Xuan arranged the affairs of the trading area, he returned to the tribe with the things at hand and began to polish the lenses.

Transparent crystal is suitable for polishing lenses, Shao Xuan tried to make a suggested telescope, when he was in another world, he used to do it by himself, and now after many years, in this world, Shao Xuan's memory is already a little blurry, however, try more, Shao Xuan believes that he can still make it.

The lens barrel is made of bamboo of different thicknesses, which is mainly divided into three sections: the front tube, the middle tube, and the rear tube. However, the most troublesome thing in this is to polish the lenses, after all, it is artificially made, there will be many defects, and if you don't pay attention to it, it will be worn out, fortunately, Shao Xuan has practiced the skills of polishing stone tools for many years, although there was no success when polishing, but after trying a few times, there is a barely satisfactory result.

The polished lens does not know the focal length, so Shao Xuan roughly uses the method of focusing light to measure it, and everything is done by manpower. After the set of lenses, eyepieces, and orthographic lenses was finally polished, and the front, middle, and rear cylinders were made, Shao Xuan assembled them and obtained a simple ground telescope.

Shao Xuan tried, and was able to see the situation on the other side from this side of the river, with the eyesight of many totemic warriors. You can see the other side of the river, but with the help of a telescope, you can see it in more detail.

The polished lenses can be used to make terrestrial telescopes with multiple magnifications, and all that is required is to adjust the length of the center tube accordingly.

However, if the telescope wants to play a greater role, Shao Xuan will have to continue to improve, and may even try to make a large-aperture telescope in the future.

During this time, Lao Ke also showed interest in making telescopes, and he tried it with stones. I practiced polishing with opaque pieces knocked off the crystal clusters, and finally I started to try my hand at making lenses. Shao Xuan briefly explained to him the general principle, and many old Ke didn't understand it, but as long as he knew what to do to get the best result, he could start construction.

In terms of polishing stone tools, in terms of fineness, Lao Ke is still a little stronger than Shao Xuan.

When Shao Xuan and Lao Ke were studying polishing lenses. The long march has returned.

The far-flung fleet did not return before the snow, but. It's snowing, but it's not too cold, and the river isn't frozen except for a few places on the shore, and you can occasionally see some fish with fangs jumping out of the water.

The expedition party goes out with a mission, except for trading. They also spread the news of the Yanhe trading area so that more people could know about it.

Second, the expedition team also probed some movements in various places on the continent, this time. Brought back some special news.

Not long after the team returned, someone came over and asked Shao Xuan to go to the mountain for a meeting.

When Shao Xuan arrived, the tower that led the team back this time was already sitting inside, talking to Ao and them.

"Ah Xuan, I'm waiting for you, come in...... What do you have in your hand?" Wu asked.

Shao Xuan handed the monocular test specimen in his hand to Wu, "Make a new gadget." ”

Hearing this, the tower that was talking about what he had seen along the road couldn't help but look this way.

Wu took the monocular and looked left and right, "What's the use?"

"It's used to see the distance, but this is only the first test I've tried to do, and it's not perfect, and there are many things that need to be improved. Shao Xuan said as he taught Wu to use the telescope.

After listening to Shao Xuan's speech, Wu became interested, and for the time being, he didn't talk about the meeting, got up and walked to the window, lifted the heavy animal skin that blocked the window, and looked out with the monocular.

This synagogue is located on the top of the mountain, near the top of the mountain, and after the catastrophe of heaven and earth, the mountain has risen much higher, so that when you look out from here, you can see the situation in the distance, and the window that Wu opened can see the other side of the river.

"Huh?!

Hearing Wu's words, the others couldn't sit still, so they wanted to come over and try it.

However, Wu put away the mirror barrel, raised his hand and pressed it, "Don't worry, let's have a meeting first, and get down to business first." After speaking, Wu put down the animal skin curtains, walked back and sat down, and before he could sit down, the telescope in his hand was snatched away by the old lady next to him.

However, the old lady also held the shelf, maintaining Wu's composure and steady, and did not immediately go to the window to look, but just studied the telescope, grabbed it in her hand, and put it on her lap.

The others looked away from the telescope in the old lady's hand, suppressed their curiosity, and began to get down to business.

The main thing is that the tower will tell you about the harvest and results of this trip, and the long-distance team will also spread the Yanhe trading area according to what Shao Xuan said, but what surprised him the most this time was also the things on the other side of the desert that Shao Xuan mentioned.

Indeed, the two continents are close to each other due to the changes in heaven and earth, and the closest place on both sides is the desert!

This once made Shao Xuan suspect that the reason why those slave owners chose to settle in the desert back then was to wait for this day.

"This time I was in some trading areas and heard some news. I guess you still remember those slave owners and slaves who appeared when we started the war with Wanshi, right?" Ta had a serious face, and there was a look of surprise in his eyes.

Yes, in addition to the desert overlord Yanling, there are also those defeated slave owners and slaves who were forced out of the desert by Yanling City, those people took their slaves and wandered around, and after destroying Wanshi, Shao Xuan also heard some news about them, those slave owners, and failed to get a favor from the tribesmen.

They can only bully some small tribes, if there is a fight between tribes, other tribes will not pay attention, but if the slave owners have the intention of robbing, the group led by the major tribes in the central part will not let it go. Therefore, even if they can survive by luck, those slave owners are not doing well.

Now, I heard that the two continents are close to each other, and those slave owners who are not doing well want to sneak back to the desert, and then find a way to go to another continent.

With that anticipation, the slave owners who wandered about, with their slaves, quietly sneaked back into the desert, and before long only a few seriously wounded people came out of the desert, and each of them looked frightened and spoke wildly, as if they had been greatly frightened.

They were met by a traveler passing near the desert and received news from them.

"Those people say that some monsters have appeared in the desert, humanoids, monsters!" said Ta in a deep voice.

"Humanoid monsters?" Shao Xuan wondered.

"Yes, those who escaped by luck died not long after, and none of the slave owners and slaves who went into the desert came out alive. No one knows what's happening in the desert today. Ta told the news of the trip.

"Those humanoid ...... Monster, have you ever been outside the desert?" asked Shao Xuan.

Ta shook his head, "I haven't heard of it." ”

The room fell silent, pondering the truth of the news.

"Do we need to be on guard, then? If those people ...... What should the monsters do when they come out?" said Dokang.

"Perhaps, it was the people of Yanling who did it?" Ao guessed.

"It's possible. If those humanoid monsters are true, eighty percent of them are related to the people of Yanling. However, the people of Yanling, their purpose is mainly the people on the other side of the sea, and in the short term, it should not affect us. Shao Xuan said, "Instead of worrying about that, let's take this opportunity to change the Yanhe area!" )

PS: Sorry for the change tonight. I'm about to go home, and I can't calm down to code words.