Xu Yi came back from Shibao City and went directly back to the wounded camp.

This made Li Wei and Cui Qi a little disappointed, but fortunately, at least there was no accident.

I guess this kid didn't come up with any way.

Just this Stone Castle City... ~ Alas, that's it.

What about Xu Yi? His mind was thinking of a roar, which was amazing, and he could first suppress and then rise, and he could also show his own bull breaking.

There is a way, but you need to give the right time to show off.

Xu Yi doesn't know any thumb measurement, he really can't, I've heard of it, I can't play it.

According to the novels Xu Yi has read, all the traversers are all-rounders who come over and know everything.

That's purely for fun, Xu Yizhen can't do it.

But he doesn't need a precise number, just an approximation, that's enough.

Xu Yi is a science student, and if he can be admitted to a university, it shows that he is passable, and some formulas and calculations are also so-so.

He doesn't need precision strikes, he just needs a general range.

Estimate, the angle of raising the head, how many steps Guo Ziyi said about an arrow, where the Tubo people will attack, how much the trebuchet can throw, how far can it be thrown... ～

Xu Yi wrote a bunch of numbers and unified the unit...... The calculation formula is mainly to be unified to the standard units used in reality.

It's very cumbersome and complicated, so Xu Yi has hysteria again.

Xu Qing went to the handsome tent to find someone again.

Xu Yi had been playing for a day, and he squatted on the ground, and his camp tent was written with dense numbers, Arabic numerals.

Xu Qing didn't know him, thinking that the head of the family had a convulsion.

How can there be such a family owner!

Indeed, Xu Yi is hysterical, and he has stuffed himself into a dead end, and he can't get out at all.

Since there is no need for precision strikes, and there is no need for precision, why calculate?

There are also a bunch of trigonometric formulas, and I don't remember it clearly.

At this time, the calculation was just finished, and when the calculation was completed, there was a paradox.

Pushing forward from the back, the front is too different from my own estimate, and the two are irrelevant.

Xu Yi competed, he was originally ready to make a splash, how could he give up?

Therefore, staying up late, even staying up late, you have to get it done, figure it out, and calculate the almost accurate value.

That's it, people often have this kind of time when they drill their own horns, and they compete with themselves.

"Brother Yi'er......"

"Don't move ......"

Cui Qi and Li Wei really cared about Xu Yi, Xu Qing arrived as soon as he called, and he brought a group of soldiers.

Now, the handsome tent has not stopped for a day, always discussing how to take the stone castle city.

came and came, but when he got to the door, he was stopped by Xu Yi.

There is no way, the ground in Xu Yi's barracks is full of numbers, which is considered a formula.

"Brother Yi, what's wrong with you?"

"Jie Shuai, Cui Changshi, kid will calculate the method of how to attack Stone Fort City by fire."

"Fire attack? The stone castle is surrounded by mountains and rocks, and the grass is low, so it is not suitable to light a fire, and even if it is ignited, it will be extinguished when the wind blows. ”

It's not that Li Wei hasn't thought about it, even Guo Ziyi has thought about it, how could Li Wei not think about it.

Cui Jue also felt that Xu Yi was a little childish.

And Guo Ziyi was a little embarrassed, as if she was casually talking to Xu to join the army... ~ I didn't expect him to take it seriously.

"What if you use stone paint?"

Oil doesn't seem to be uncommon in the Northwest. Although Xu Yi didn't remember any large oil fields in this place in later generations, Xu Yi had heard of stone paint more than once.

"Stone paint? Xu joined the army, and the stone paint can indeed be ignited, and it does burn longer than the wild grass, and it is poisonous. ”

"However, after the stone paint was ignited, the fire was not big, and it was not even as good as the wild grass. Now that spring is blowing, the wind is blowing every day, and as long as there is a gust of wind, the fire of stone paint will be extinguished. ”

Guo Ziyi was not qualified to speak, maybe she felt guilty that she had made Xu Senjun hysterical.

That's all there is to it.

"What if I could make the stone paint ignite easily? It's really not that hard, I'm calculating how I can surround the whole Stone Castle City. ”

"As long as the stone paint can be lit around the stone castle city, the kid thinks that the Tubo people can be destroyed without a single soldier at all!"

I've been busy for so long, isn't it just waiting for this opportunity to show off?

Xu Yi said sonorous and powerful, that is, his voice in the voice change period made his sonorous voice discounted.

"Really?"

Well, Xu Yi suddenly didn't understand what Li Wei really was, if he could really destroy the Tubo people, or if he really didn't need a single soldier, or maybe it could really make the stone paint burn easily, it should be the latter.

"The kid is willing to make a military order, as long as the marshal has enough stone paint, and when the kid calculates the appropriate delivery range, it will be easy to take the stone castle city."

Xu Yi came casually. I often hear people say that the military order, let's set up one, what's there!

He knew that there was no military order in the army of the Dasheng Dynasty, and when did this military order come about······ If you are willing to examine the evidence, you can give it a try.

"Xu joined the army, there is no need to calculate the range, the army attacked Shibao City, and it was a stone's throw away from Shibao City several times and successfully ······"

Since it is military affairs, Li Wei also seriously called Xu to join the army.

It's different, that's what the great marshal of this era thinks. Xu Yi didn't think so.

If he still relies on filling in people's lives, how can he come up with Xu Yi's clever calculation first.

We are different, and everyone has different experiences······

Cui Jue looked at him vigorously, this kid is too reckless, how can he say such things casually? This is in front of many generals, not him Cui Qi and Li Wei.

King Xin'an has been driven crazy by Stone Castle City, and if anyone has it, even if there is a little way to take Stone Castle City, he is willing to give it a try.

At this time, Li Wei is a handsome, not your Uncle Li of Xu Yi.

But this situation is already difficult to reverse. Look at the generals who are about to pounce on each other, and then look at Li Wei's excited energy······ Brother Yi, you are playing big!

As a general, no one wants his subordinates to die, but in the face of the sage's strong orders and the determination of the commander, no one really dares to disobey.

At this time, Xu joined the army and jumped out······ Saving nearly 2,000 soldiers, this credit is big enough, even if there is a mistake, probably, maybe there will be no problems, right?

"Jieshuai, the kid doesn't need to be a stone's throw away from Stone Castle City, he needs to use stone paint to enclose the entire Stone Castle City······"

Xu Yi couldn't explain to these that once the fire broke out, it would instantly drain the oxygen in Stone Castle City, and they didn't understand it.

Why do you have to see blood to kill someone? Isn't it fragrant to watch the Tibetan people suffocate to death?

Maybe it's really not fragrant, and it may stink, maybe those Tubo people in Shibao City will become barbecued meat······ It's disgusting to think about.

Li Wei seemed to calm down a little, looked at Xu Yi solemnly, and couldn't see that this kid was abnormal.

"Xu joins the army, what do you need?"

"Stone paint, a lot of stone paint, jars, jars of stone paint, the rest is trebuchets."

"Also, it's better to have some reliable craftsmen, and forget it if you don't have it."

Xu Yi said this, even Cui Jue seemed to be relieved, especially Xu Yi said: Reliable craftsman, that is, Xu Yi may have something new.

Okay, let him try, with himself and King Xin'an here, he won't let him suffer a loss after all.