Stone striking is a fairly flexible technique.

A monk with low strength can control the ground and throw it at any time, the size of a large canpapaya, and a monk on the second layer of the normal Qi refining period can condense a stone striking technique the size of a normal human head.

If the strength is more advanced and cultivated, and the cultivation reaches the third layer of the Qi refining period, the stones condensed from the land can be even larger, just like half of a person's body.

The monk in front of him, seeing that his cultivation was obviously only one layer in the Qi refining period, had condensed a stone that was almost the size of half a person's body.

This stone is not a round stone, but a boxy stone that looks very regular.

Yu Qingyi noticed something strange, so she looked more seriously.

The next scene also surprised him even more.

Because, after he saw that the monk had condensed the stone and lifted it up about half a person high, he threw it down directly.

There was a dull thud, and the boulder slammed to the ground.

Yu Qingyi was even more puzzled, she observed very carefully, this monk's mana was normal, and there was nothing wrong with his behavior, it didn't look like a move to get rid of his strength if he couldn't get home.

Sure enough, the monk drove the boulder back into the air to the point of half a man.

And then...... Fell down again.

The only difference is that the stone has moved one step forward, which is exactly the length of the stone.

Seeing this, if Yu Qingyi still doesn't understand what's going on, it's too stupid.

That's right, this monk actually used the immortal cultivation technique to build a road and lay a foundation!

And he's not alone.

Obviously, he was just one of the first to arrive.

There were countless monks like him, as did many others, who lifted the stone with stoning and then slammed it into the ground, tampling the foundation.

"A dignified immortal cultivator has become a construction site worker?" Yu Qingyi felt that this world was a little too crazy.

More crazy seems to be yet to come.

There were also a dozen monks, who also used stone striking to condense the stones on the ground, and then transported them to the carts. One stone after another is very regular.

Afterwards, another monk stood in the reservoir and chanted words, and then a series of spells were played, which was a spell called the Stone Wall Technique.

This spell can coalesce the earth and gravel on the ground to ward off arrows, spears, swords and axes.

However, after the mana of these dozen or so monks was urged, the prototype of a reservoir was quickly completed.

Subsequently, stone strips were paved and a reservoir dam slowly took shape.

What surprised Yu Qingyi was obviously more than that.

The most important thing about the reservoir is obviously to have a valve mechanism that can store water during floods and discharge water during droughts. Therefore, the spill and the like are very important.

Water conservancy facilities such as Dujiangyan can only be realized if they are ingenious.

There is no such talent at Jeshi University at present.

Therefore, the reservoir they designed is an honest reservoir that stores and discharges water.

As Yu Qingyi went deeper and deeper, the mirror image she saw surprised him more and more.

He was not mistaken, more than twenty students, under the leadership of a formation mage in the foundation building period, were constantly setting up formation eyes and penetrating into the formation flag.

The aura between heaven and earth slowly condensed in it, and an almost visible aura fluctuation appeared in front of Yu Qingyi's eyes.

He understood that this was an energy-absorbing device for a large formation.

Not all formations can only rely on spirit stones to meet the consumption of spiritual energy.

Because, the intelligent array mage discovered early on that he could absorb the aura dissipated from the outside world to fill the formation.

When most formations are not activated, the aura required is only used to meet the needs of daily maintenance.

As a result, they have devised a wide variety of energy-absorbing devices.

Of course, such formations are all amazingly expensive, complex in design, costly, and most importantly, there needs to be a huge formation area to spread out.

Generally speaking, it is often the most used by the big forces of various sect families, the so-called mountain defense formation, and the city defense formation are all like this.

Of course, Yu Qingyi has also seen this kind of formation.

It's just that he never expected that the next time he saw this kind of mountain guarding formation today would be on a reservoir.

At the same time, a cheer rang out from the formation.

Sure enough, a powerful spiritual power valve slowly took shape.

This valve blocked the flow of water, and the turbulent river upstream seemed calm and tame at the moment.

Next, it's just a simple water grinder.

A complete prototype of a reservoir has been completed, and it only needs some villagers to continue digging to consolidate the reservoir.

After taking Yu Qingyi to read these, Ji Xia did not stop, and continued to walk forward with Yu Qingyi.

Not long after, they went to a small cottage.

After approaching the small cottage, Ji Xia also specially instructed Yu Qingyi to bring a hat veil.

"It's not to hide the description, but this is a place to cultivate spirit worms. Ji Xia explained: "In this world of cultivating immortals, there is a special type of monk who relies on cultivating spirit insects and spirit beasts to fight. Relying on tens of thousands of flying insects on the city wall at every turn, he is very strong in the fighting method, and it is very troublesome to deal with. ”

"However, keeping these flying insects in captivity is not a trivial matter. First of all, feeding these tens of thousands of flying insects is a big problem. But...... This time we came up with a trick. Ji Xia said, walked in, and said to a thin and capable man.

"Lao Hong, how is the cultivation of this strong mantis?" asked Ji Xia.

Lao Hong said: "You came just in time, I will lead you to see and understand." ”

After speaking, Lao Hong went out of the house, dragging a spirit pet bag in his hand.

The spirit pet bag was very slender, and when it was not taken off, it hung like a belt on the waist.

After taking it off, it floated in the air, and saw hundreds of praying mantis-like things flying in the air, and then slowly fell into this spirit pet bag.

At this time, this spirit pet bag has changed from a large cylinder to a cuboid, as if it is a beehive, and there are dense fine holes inside, and one after another strong mantis lives in it.

Lao Hong's eyes looked around, and finally he had a word, and a compass-like thing in his hand was always looking, looking for directions.

After hundreds of steps in a row, Lao Hong stopped laughing and threw the powerful mantis in his hand into the air.

After a short time, I saw these strong mantis flying densely into the air and landing on a grass in front of them.

It didn't take long for these strong mantis to be turned into burrowing rats as if they were not insects, and a good piece of green grass was turned over.

Yu Qingyi didn't want to ask herself, it seemed that she didn't have a level of vision, so she leaned over carefully and looked at it carefully.

This look couldn't help but surprise him.

Because, all the locust eggs that came out of the ground were there!

Yu Qingyi's eyes were full of surprise, how smart she was, and she instantly understood the significance of this place.