Xu Yuan’s eyes were very serious when he spoke.

Along the way, he saw the role of formations in this world, including war, people's livelihood, production and other aspects.

Technological innovation is a real contribution to the development of productivity.

In the past, it was normal for the common people to go hungry even in the prosperous times, but now the people of Great Yan are basically guaranteed to have two meals of rice, and the market is even divided into four grades: A, B, C and D, and even cultivated rice containing rice. Qi’s spiritual rice.

In the words of the previous life, this fourth sister is a top scientific research talent.

What does it mean that you, a scientific research talent, do not just stay in the Gewu Institute doing research and go out to run "business"?

Thinking of this, Xu Yuan suddenly glanced at the boots and clothes on the feet of the fourth sister and asked:

"Xiaosi, did you research these boots yourself?"

Xu Xinyao didn't speak immediately, she lowered her eyes and thought about what Xu Yuan had just said.

After a while, she suddenly raised her head:

"Ah?"

Xu Yuan repeated what he just said.

Xu Xinyao pursed her lips and smiled:

"Well, yes."

Xu Yuan then asked:

"I saw that a shield was created when I attacked you earlier. Is it because of your clothes?"

Xu Xinyao shook her head, put her hand on her collar, and pulled it down.

"."

Xu Yuan's eyes did not move, a trace of curiosity flashed in his eyes.

Looking down along the girl's delicate collarbone, Xu Yuan saw a piece of sky blue slim-fitting soft armor.

Some faint formation patterns can be faintly seen on the soft armor. The formation patterns are very precise and the lines are almost invisible to the naked eye. Only with the mind soul can the specific formation patterns be sensed.

Xu Xinyao said softly:

"The cloth material cannot withstand the array pattern, so this is the Sky Feather Armor."

"Then do you have any means of attack?" Xu Yuan asked next.

"Yes."

Xu Xinyao had no intention of hiding anything from Xu Yuan. She pulled up her sleeves on both sides and tied something similar to a bracelet on each wrist.

Without Xu Yuan asking, Xu Xinyao raised her hands toward the ground without thinking about herself.

"Da."

After a wave of source energy and an almost inaudible sound, a millimeter-thin needle penetrated about ten meters into the ground.

The moment Xu Yuanyihun sensed it, he went numb and glanced sideways at Ran Qingmo.

Looking at each other, Ran Qingmo said softly:

"It's no use to me."

Xu Xinyao said softly:

"Sister Qingmo's cultivation is so advanced that toys like this are naturally useless."

While talking, Xu Xinyao took out two big guys from the Sumeru Ring.

A crossbow and a thick stick about ten centimeters in diameter.

Xu Yuan's eyes were a little confused.

Xu Xinyao seemed to have no intention of stopping. She handed two things to Xu Yuan and motioned for him to take them first, as if she wanted to show Xu Yuan all her weapons.

Xu Yuan subconsciously took it, sensed the two things with his mind and soul, and found that the stick was hollow. He subconsciously lifted it up and took a look inside.

At this moment, Xu Xinyao explained softly:

"This is the soul-splitting crossbow, which can attack the mind soul. That stick can shoot source crystal explosives."

"."

Xu Yuan silently put down the stick and raised his eyes to look at the fourth sister who was displaying weapons.

At this time, Xu Xinyao had already taken out a strange-looking object from the Sumeru Ring.

It is rectangular in shape, one foot long, and is covered in ink like a black box, but there is a handle below, but no trigger.

When Xu Yuan saw this thing, his eyes jumped.

The appearance of this thing reminded him of the "ultimate move" of the four sisters in Cangyuan.

In Cangyuan, as long as these four girls use their moves, the 2.5D villain will find a dark guy.

Xu Yuanzheng wants to ask.

Xu Xinyao has pointed the black box at the ground aside.

"."Xu Yuan.

"Whoops——"

There was a slight sound, and Ran Qingmo on the side frowned slightly unconsciously.

Xu Yuan didn't see it clearly because the saint's remnant soul was still sealed, but he sensed a huge wave of source energy spreading towards the surroundings.

And the next moment,

Xu Yuan clearly saw the power of these four sisters' "ultimate moves".

A hole as thick as a thumb appeared on the ground.

It was dark inside, extending downward until the maximum range of Xu Yuan's own soul power had never seen an end.

A moment of silence,

Xu Yuan frowned and asked:

"Xiaosi, where did you get the source of Qi for this instrument?"

The previous bracelet was disposable, and the crossbow and stick were inlaid with concentrated source crystals, but this black box did not have any source of source energy.

Xu Xinyao smiled at Xu Yuan, stretched out a jade hand and waved it in front of Xu Yuan.

A light blue ring on the index finger is particularly eye-catching.

"Isn't this the Sumeru Precepts?"

Xu Xinyao shook her head with a gentle voice:

"It is somewhat different from the ordinary Sumeru Ring. It can directly extract the source energy from the source crystal in the Sumeru Ring."

"."

Xu Yuan's eyes froze: "Did you research this yourself?"

Xu Xinyao nodded: "Yes, but my father helped me a lot. Without my father's cultivation, this ring would not have been made."

"."

At this moment, Xu Yuan suddenly felt that there was still a big problem with his father's education policy.

This kind of innovation in formations is already of an epoch-making nature. Instead of tying this kind of scientific research talent back to study honestly, she is actually allowed to wander around?

Technology is the primary productive force, haven’t you heard this sentence?

After a few breaths of silence,

Xu Yuan looked at the Sumeru Ring on the fourth sister's slender jade finger, and suddenly coughed slightly:

"Ahem, Xinyao, third brother didn't hit you voluntarily before. Look at this ring and this black box."

After Xu Xinyao hesitated for a moment, she handed the black box to Xu Yuan and started to take out the ring.

"."Xu Yuan.

The other party wouldn't be able to deal with him so simply. What he just meant was to help him build a new set after returning to the Imperial Capital.

Xu Yuan held the opponent's arms and freed up a hand to hold her hand to take the ring:

"What I mean is that when you get back to the Imperial Capital, you can help me make a new set. You have to keep this thing to save your life."

Xu Xinyao hesitated slightly:

"It's enough for me to use the soul-breaking crossbow. Third brother, you are always in trouble and need this more than me."

Xu Yuan waved his hand and stuffed all three objects back into Xu Xinyao's arms:

"Okay, if Xu Changge sees me carrying your things when I return to the Imperial Capital this time, he will probably think that I robbed you."

After a pause,

Xu Yuan glanced at the bracelet on Xu Xinyaohao's wrist and whispered:
To be continued...