Looking at the mud and stone powder in front of him, he checked it a little, Lu Chen took a deep breath, and then waved his hand and ordered:

"Experiments with mud and stone powder will begin immediately."

"Yes!"

With an order, a group of craftsmen who had just been transferred from the Ministry of Industry immediately started.

Since it was an experiment, there was no need to worry too much about the cost, and it didn't take long for the mud and stone to become the best test state.

Immediately afterwards, the craftsmen skillfully mix the mud and sand together in a certain proportion, and then add water and stir it.

When the cement was poured into the mold prepared in advance, Lu Chen suddenly turned his head and said to Fu Huan on the side: "Liangyu, I'm sorry for you." ”

Fu Huan smiled slightly.

"Between you and me, why should it be like this?"

With that, he stood up and walked slowly to the mold.

Then I saw her slowly raise her hands, her ten fingers changed rapidly, and she played one seal after another, and at the same time, the spiritual power in her body was running wildly, and in the blink of an eye, more than a dozen mysterious spirit forms composed of countless runes appeared around her out of thin air.

Syllable!

At the moment when the spirit form was running, Fu Huan suddenly clasped his hands together, and all the magic circles suspended in mid-air trembled suddenly, and then fell into the ground at the same time.

In the next second, a huge magic circle slowly emerged from the ground, enveloping Fu Huan and the surrounding mud and stone molds in it, and at the same time, it bloomed with a rather dazzling light.

Countless brilliance circulated in the magic circle, and the mud and stone in the mold were constantly changing under the shroud of brilliance, as if time had been accelerated.

Fu Huan is already extremely good at Qimen Dunjia, all kinds of formations are at her fingertips, others need to prepare for a long time spirit form, she only needs a few breaths to launch, and the power of the formation she launched is comparable to the root formation built with various spiritual materials.

After breaking through to the Unity Realm, the power of her formation became stronger, and she could do some things that the Root Formation couldn't do.

Like now.

In order to speed up the progress of the experiment, Lu Chen specially asked her to come over to help, so that she could be a master of the One Realm and give a hand to the Tiangong Division.

In this regard, Fu Huan is too much better than others.

Fortunately, Fu Huan didn't have any scruples, and he didn't care about this trivial matter at all, but when Lu Chen made a request, he inexplicably gave him a feeling that he couldn't ask for it.

Gradually, a puff of water vapor began to rise, making the scene inside gradually blur.

Fu Huan's Miaoman's figure, in the increasingly dense water vapor, can gradually only see a general outline.

"Hah..."

Fu Huan suddenly took a deep breath, and then gathered a large amount of spiritual power in his mouth.

In the next instant, with more than a dozen instantaneous seals, the spiritual technique was ready in an instant.

"Breathe the Storm!"

The spiritual power in the mouth was violently spit out, and the surrounding wind aura began to gather rapidly under the action of spiritual magic, and soon a strange updraft was formed, which continuously blew the water vapor gathered inside into the air, and finally quickly dissipated.

The water vapor dissipated, and the scene inside was once again presented to everyone.

But I saw that the mud and stone in the mold had begun to take on the appearance of a slate.

Just like the first time I tested the mud and rocks that Liyue had brought with me.

It can be seen that the cement in Lu Chen's impression is still slightly different, and the process of coagulation and solidification is not the same, but this is also understandable, after all, the composition is not exactly the same.

However, the functions and characteristics of the two are similar, and there is nothing wrong with treating them as cement.

After another moment, a drop of fine sweat appeared on Fu Huan's temple.

"Alright."

At this moment, Lu Chen suddenly spoke.

"Liangyu, you can stop."

As soon as the words fell, the spirit form beside Fu Huan disappeared almost instantly, but her face was as usual, and she was not affected by the backlash of the interruption of the magic circle at all, and she had obviously reached the realm of retracting and releasing freely.

Such a superb level of formation made Gu Simiao sigh in amazement.

"Amazing, he actually eliminated the backlash of the magic circle so easily, and he deserves to be the number one master under His Royal Highness the Holy King."

Click...

Fu Huan's toes were a little bit, and her body floated up, and finally landed firmly behind Lu Chen.

"Thank you, Liangyu."

Lu Chen said softly.

Fu Huan shook her head, then smiled back.

Nothing was said, but everything was left unspoken.

Looking at the tacit appearance of the two when they looked at each other, the empress frowned inexplicably, and then glanced at Fu Huan deeply, and that look seemed to realize something.

The little hands under the dragon robe clenched slightly.

"Lu Qing."

She took the initiative to speak, breaking the peace.

"The mud and rocks have solidified, right?"

Lu Chen withdrew his gaze from Fu Huan, and then nodded.

"Yes, Your Majesty, the follow-up tests can now begin."

"Let's get started, then."

The empress commanded.

"Yes, Your Majesty."

Lu Chen bowed down.

Soon, the officials of the Tiangong Division couldn't wait to step forward, brought various tools and began to carry out various strength experiments.

Liyue's expression tensed again as she watched the craftsmen hammer their sledgehammers on the mud and stone slabs, her small hands gripping Lu Chen's big hands tightly, her big watery eyes full of apprehension and antiquation.

She doesn't know what to do, after all, she is just a martial artist herself, and she is also a top-notch master with first-class strength, and she is also a leader in the entire Xuanwu Army, otherwise she would not have been selected as Xuanjiwei.

If she hadn't been in trouble all the time, her position in Xuan Jiwei would never be lower than Tao Ji's.

And the reason why she tinkers with those things that are messy in the eyes of others is purely because she likes it.

In the past, most of the things she tinkered with had brought bad consequences and added a lot of trouble to Fu Huan, naturally none of them could come in handy, and the mud and stone were the first novelty she made that could be valued by others, and it was also valued by people she admired.

Lu Chen, who studied heaven and earth in her heart, was a real Wenqu star, said that this thing was very useful, and it could even change an era, which was of great significance.

She believed this, so she was more nervous and excited than anyone else at the moment when the results were about to come out.

The empress was also a little nervous.

As the emperor, the highest power holder in the empire, her understanding of the meaning of the birth of mud and stone is not much worse than that of Lu Chen.

It can be said that in her prosperous picture, mud and stone must be one of the most important modules.

After some tossing, several officials of the Tiangong Division soon trotted over with joy.

"Your Majesty! Lord Lu! ”

After bowing, the two said with ecstatic expressions:

"After testing, this batch of mud and stone burned with charcoal as fuel and the mud and stone burned with the Heavenly Fire Array, their characteristics in terms of strength and other aspects are almost identical!"

"We made it!"

As soon as these words came out, the last stone in Lu Chen's heart finally fell to the ground.

A smile also bloomed on the empress's face.

However, just as she was about to issue a decree to reward all those who had contributed to the research and development of mud and stone, especially Liyue and Lu Chen, the two who had made great contributions...

"Too ......"

Liyue covered her mouth, tears glistening in her big sparkling eyes.

"Great!"

She shouted violently, and then jumped up uncontrollably, hugged Lu Chen, like an octopus, firmly hung on Lu Chen, and said happily:

"Lord Lu! That's great!! I... I did it!!! ”

Fortunately, although she was excited, she did not lose her mind, and still firmly controlled the huge spiritual power in her body, and did not hurt Lu Chen.

Lu Chen just felt a little flustered.

It feels like being held by an elementary school student.

"Haha."

Lu Chen laughed heartily.

"I didn't expect that the new building materials project was just approved a few days ago, and there was not even a single eyebrow, but now it has been made, which not only saves countless expenses for the Ministry of Industry, but also saves a lot of R&D funds, Liyue ......."

He slowly reached out and gently placed his hand on Liyue's little head, which was extremely excited, and rubbed it quite indulgently.

"You are really the lucky star of our Heavenly Engineering Division."

"Hey, hey."

Liyue, who had calmed down a little, smiled stupidly.

She didn't refuse Lu Chen to touch her head, but arched into his arms even more vigorously, and her little head was closer to Lu Chen's palm, looking like she was enjoying it very much.

At this moment, she forgot that she was actually a year older than Lu Chen, and Lu Chen did not treat her as a peer, but as if he were an elementary school student, he stroked Liyue's little head and kept complimenting her.

This seems to be a harmonious scene, but the expressions of the women behind Lu Chen are inexplicably a little weird.

Su Ning didn't think much about it, and after the excitement faded slightly, she couldn't help but sigh with emotion: "The study of things is really magical, who would have thought that these ordinary things, as long as they are mixed according to a certain proportion, and then processed in a certain way, their characteristics can change so drastically." ”

Hearing this, Lu Chen nodded approvingly.

"Yes, everything in the world is a miracle, isn't this a manifestation of the Great Dao? The meaning of the existence of the Tiangong Division is to study the characteristics of all things, discover the laws in it, as long as you master the laws, you will have the opportunity to use them for the benefit of the common people, and once you do this, it will not be far from the real avenue. ”

As soon as these words came out, the spiritual veins that had just stabilized in the bodies of all the officials of the Tiangong Division actually became restless again.

"Alright."

Lu Chen put down Liyue, whose face was flushed, turned his head, looked at the Empress and Gu Simiao, and said with a smile, "Now that the cost of mud and stone has been solved, it's time to move on to the next step." ”

"Without further ado, it's time to accelerate the mining and refining of coal in Montenegro, Taihe County, and it just so happens that the household department sent the first research and development fund of 100,000 taels of silver a few days ago, and now it can just come in handy."

(End of chapter)