Whether it is now or in the future, this thing will definitely be of great help to him!

Simple principles of optics are taught in junior high school physics. Like this simple Galilean glasses, Zhan Tian was in the physics classroom and saw the teacher demonstrate it himself.

This is the advantage of the earthlings, and some simple gadgets will definitely play a great role in the world of cultivation.

Holding the clairvoyant mirror and looking around for a while, Zhan Tian probably judged that its magnification was about five or six times.

This magnification is enough for current use.

Seeing that it was not early, he entered the food shop to prepare some food, and then continued to start the extreme workout.

On the second day, with no one to summon him to hunt, he continued to the woods before him to practice the body.

The body of the war slave killed the day before yesterday should have been cleaned up, but Zhan Tian did not go to watch it.

After a long conversation that day, Maple Leaf also had some interest in his exercise method, and the two of them practiced separately dozens of steps apart, and occasionally exchanged a few words.

In this way, Zhantian's own Jeet Kune Do body style has been greatly improved!

At noon, it was still Zhantian cooking, and the two of them feasted together.

After eating and drinking, Zhan Tian did not return to the woods to cultivate by himself, but went to a place where the clay was hidden, and packed seven or eight bags of clay to bring back.

In the afternoon, he planned to continue the construction of the stone house.

Now there is only a little more than a month before the amnesty in Donglin City. However, whether this kind of thing can succeed or not is not something he can decide, whether he will do it step by step and complete what he planned to do.

Using stones, wooden planks, and a simple scaffolding, Zhantian began to build the wall again.

By the time it was getting dark, the wall had increased to nearly a foot.

For the next three days, Zhan Tian only went out hunting once. For the remaining two days, he practiced not far from the maple leaves in the morning, and returned to the station in the afternoon, and began to dig in the direction of the wall near the south side.

After digging a pit eight feet square and six feet deep, he surrounded the three sides of the pit on the east, west, and north sides, and reinforced it with large stones more than four feet high.

After doing this, he went back to the woods, looked for trees of the right thickness, cut them down with a brick knife, scraped off the bark, and carried the trunk back to the station.

The trunk he prepared was about half a foot thick and nearly three feet long.

Three days later, he had cut down and brought back more than fifty huge tree trunks and piled them up on both sides of the wall.

Preparations, starting on the fourth day, Zhantian began to cap the stone house.

First, he went to the blacksmith shop and ordered a batch of iron bars three feet long, thick iron plates three feet wide and more than five feet long on both sides, and four thick iron pipes with the thickness of the bowl mouth and curved at both ends.

After that, he found an iron rod the thickness of his thumb, and using the blacksmith's tools, he simply bent it horizontally, and pulled it back vertically to make a handle.

The iron rod in front is more than a foot long, and Zhan Tian put a piece of wood of two or three inches on it, and then beat the pointed tip into the shape of a wall drill bit.

After grinding the edge, it is made of a simple hand-cranked drill.

Back next to the fence of his house, Zhan Tian used a rope to compare the dimensions, then the drill bit against the trunk, his left hand held the wood in the middle, and his right hand shook the handle to start punching holes in the trunk.

After making a dozen hollows in the trunk of a tree, he sent it horizontally from east to west to the wall.

After nearly a day of such busy work, he went to the blacksmith's shop, took out a dozen iron bars that had been made, and then penetrated them through the drilled holes, and connected more than fifty tree trunks into one.

After the two sides were fixed, it was already dark.

Zhan Tian grabbed the middle of the tree trunk and roof with a brick knife to cut out four bowl-sized holes, and then he completely completed today's work.

I went to the food shop and used some coarse grain steamed buns, and then I exercised as always.

At dawn the next day, Zhan Tian first made a large amount of colloidal concrete out of clay, gravel and glue, and then used large stones to fix it on top of the trunk and around the wall below.

After that, a large amount of colloidal concrete is poured over the trunk of the tree.

During the pouring process, all the remaining iron bars were put into it for reinforcement.

Four iron pipes with curved ends are also fixed with colloidal concrete facing the four aspects of the southeast, northwest and northwest with the nozzles.

In this way, by noon, the roof of the stone house was preliminarily completed.

Just sit down on a big rock at the edge of the roof and take a break.

Glancing at a corner on the south side of the station, Zhan Tian took out a coarse grain steamed bun from his pocket and chewed it slowly.

In the corner over there, there was a newly built tent, and he had seen it twice in the past two days when the roof was being built, and the girl named "Xian'er", who had been rescued that day, came out of the tent.

The girl had learned the lesson of the previous days, and was evidently much more cautious, dressed more carefully, and spent most of her time in the tent.

Once when she came out to eat, she passed by Zhantian's stone house, glanced at the roof casually, and there was no change in her eyes, she should not have recognized Zhantian.

Retracting his gaze, Zhan Tian couldn't help but shake his head, that girl was only thirteen or fourteen years old, if she was placed on the earth, she would still be cared for and pampered by her family in every way!

It's a pity here......

After eating a steamed bun, Zhan Tian completely put these things aside.

Compared to the girl, he was even worse.

When he came to the station, he was not single and penniless, and he was bullied by the horse gang. In the bottom of my heart, I am still worried all the time, Ye Suifeng may find this place at any time!

At the very least, the girl could sell a water spirit pendant that she got out of nowhere, although she was ruthlessly cheated by the grocery store shopkeeper. But ten taels of silver, that is also 10,000 copper coins, that is, 10,000 coarse grain steamed buns, enough to eat for a long time.

And it seems that because of several conflicts with Zhan Tian and a lot of losses, the horse gang is now much more settled. The girl came to the station and was not bullied and harassed by the people of the horse gang.

Jumping off the roof, Zhan Tian re-entered the blacksmith shop and took out the last item he had customized, which was two thick iron plates.

It is said that it is an iron plate, but in fact, one side of it is a fused and cast iron trough with a depth of about half a foot, and the thickness of the iron plate on both sides is half an inch.

Fill the iron trough with colloidal concrete, and then cover the other side with an iron plate and wait for it to slowly solidify and solidify.

Finally, Zhan Tian went to the grocery store and bought eight copper mirrors for later use.

Exercising in the stone house for a while, by the time the sun sets, the door that is half an inch thick on the outside and filled with rubber concrete on the inside has solidified and solidified.

Lift the gate and attach the stone pillar that has been made at the door.

This stone doorpost is the craftsmanship of this world, and it took some time to exhibit, but it is strong enough.

After attaching the gate, he climbed onto the roof again, smeared some glue around the four bronze mirrors, and carefully placed them inside the four curved iron pipes.

These four curved iron pipes, to outsiders, seem to be the ventilation holes of the stone house.

But the actual effect, of course, does not stop there.

Looking at the right angle, Zhan Tian jumped off the roof.

Back in the house, he put the remaining four bronze mirrors into the elbows where four iron pipes hung down from the roof.

I have looked at them one by one, and the general situation around the station, east, south, west, and north, has all appeared in the bronze mirror below!

"Periscope!"

Although the scenery reflected by the bronze mirror is not clear enough, it is enough for him to monitor the entire station and some general conditions around the stone house!

Move your legs and feet, Zhan Tian feels in a good mood.

His stone house, the stone walls on all sides are more than a foot thick, the roof is paved with thick tree trunks and glue concrete, the thickness also reaches one and a half feet, and the gate uses a half-inch thick iron plate, supplemented by self-made concrete, which is thickened to more than half a foot, no less than the thickened explosion-proof doors on the earth!

Coupled with four periscopes to monitor all sides, his stone house can no longer be called a stone house!

It's "Fortress!"