Chapter 1609

Swish, swish, swish!

As soon as this was said, everyone looked at Li Erji.

"Brother Ji, you understand?"

Pu Duo said in astonishment.

Li Erji was stunned, "Uh, what's the situation?"

"You didn't understand?"

Why was everyone staring at him with blank faces?

Even Gao Yang was shocked.

He said with a guilty conscience, "Shouldn't I understand?"

"If this is difficult, then most likely... most likely I understood it wrong."

Gao Yang: "..."

He also smiled dumbly; this thing was too complicated to say.

Let alone Li Erji, even when he first learned it, he felt it was extremely obscure and difficult to understand, and he could only calculate it roughly.

"Don't worry about it. In short, according to this calculation, you can roughly calculate the wind force of the horizontal speed and avoid the march route in advance."

"What about the altitude?"

"If it's an estimate, is it as difficult as this?"

Wang Xiao said with a tingling scalp.

"That's not difficult. Just send scouts to take snow from the leeward place, put it in a copper basin, heat it with fire, and when it just melts into water, leave it for a period of time."

"Generally speaking, it won't freeze below two thousand meters. Above two thousand to two thousand five hundred meters, because the temperature continues to drop, it will freeze in about four hours. If it freezes within two hours, it must be over three thousand meters. I have already sent people to do experiments and made a rough estimate!"

"My Lord, what about the direction?" Gao Bushi asked curiously.

Gao Yang took out a compass and said, "As for the direction, naturally rely on it."

"Forget it, the so-called trigonometric functions are too complicated. You won't be able to understand them even if I explain them. You just need to know that I have done a lot of homework."

"It's getting late, go down and rest. After resting today, march faster tomorrow, and we can rush out of Canglan Mountain and enter the Hexi territory!"

The generals heard Gao Yang's voice and bowed together, "Yes!"

After leaving the camp.

Pu Duo asked curiously, "Brother Zhao, do you think the Prime Minister calculating wind direction with sulfur smoke is really confident, or did he just happen to hit it?"

"And this tan something angle, have you heard of it?"

Gao Bushi frowned and then shook his head.

"I haven't heard a damn thing. This is the first time in my life I've heard this word!"

"But although the Prime Minister is strong, the white-haired gale should also be the power of heaven. How can this be measured?"

"Forget it, let's just do as he says. Rest quickly. Tomorrow, our army can kill into the Hexi territory. It doesn't matter if this is true or false."

Pu Duo nodded. "That's true."

"It's just that this ghost place is too evil. It's only June, and there is unmelted snow on it. This Canglan Mountain is worthy of the word natural barrier."

Pu Duo cursed.

A night passed without incident.

Although Da Qian did not carry much baggage, the fuel needed for camping was necessary.

Once the altitude approached three thousand meters, various problems followed. The most important was that the temperature difference between day and night was too large, and the temperature at night was too low. If there was no protection and no fuel, people would freeze to death in less than half an hour.

"Pass my order!"

"The entire army is to set off, scouts first!"

Gao Yang gave the order and spoke.

He walked out of the tent, but his brows locked tightly.

The wind today didn't seem small.

Gao Yang looked up at the sky.

Very soon, the scouts carrying fire starters and sulfur and other things set off first. They were to survey the army's forward route and find the mountain ridge.

When the army was five miles away, the scouts ignited the sulfur.

A light yellow smoke column instantly rushed toward the sky.

Seeing this, the expression on Gao Yang's face changed quietly.

"Prime Minister Gao, what are you doing?"

Pu Duo was also stunned and looked up at the sky.

Although Pu Duo didn't understand much, he felt that the angle of this smoke column was very different from yesterday's, almost reaching a horizontal position.

Gao Yang took out a crossbow, aimed at the light yellow smoke column, and there were scales already engraved on it, each small grid being 5 degrees.

"Nearly eighty degrees, tan80 should be 5.6, this multiplied by two... is more than ten meters per second, this is a level six gale!" Gao Yang muttered, his expression solemn.

"Just ahead is a level six gale. According to fluid mechanics, the wind speed at the mountain pass is equal to the plain wind speed multiplied by 3. The wind speed ahead must exceed level seven!"

"This wind is not small!"

Gao Yang decisively ordered, "Pass the order down, find cover, granite mountain ridges with an inclination of more than thirty degrees are best, the avoidance distance is seventy to two hundred zhang, use shields to form a turtle formation, with a distance of no more than 1.5 steps between front and back. The white-haired gale is coming, pay attention to precautions!"

As soon as the words fell.

The entire Da Qian army moved one after another.

Everyone found cover on the spot and gathered together.

"The Prime Minister has an order, form a formation!"

"The Prime Minister has an order, form a formation!"

"If the cold current persists, ignite fuel inside, pay attention to keeping warm, leave a small hole!"

Accompanied by urgent voices, everyone quickly formed a formation.

Clang!

Clang!

Shields were brought close, and the Da Qian soldiers formed a circle. The heavy armored soldiers in the outer layer knelt down halfway and smashed their shields into the ground, fixing them tightly, just like a big turtle shell, indestructible.

Pu Duo and Gao Bushi were also shocked, but their movements were not slow.

Not long after.

Crash!

Outside the shields, a strong wind rose, and the temperature dropped accordingly.

The snow on the ground was rolled up, snowflakes fell in the sky, carrying a bone-chilling coolness. Between the howling wind, the entire Canglan Mountain summit was white.

"It's here!"

"It actually came!"

Pu Duo's expression was shocked.

Zhao Bushi was also shocked.

Gao Yang... actually predicted the white-haired gale.

And he had made preparations in advance!

This method was simply shocking!

The white-haired gale came quickly, but it did not last for several days like in winter. On the contrary, it only lasted for a few hours before the wind speed gradually weakened.

Gao Yang looked at the sky and said decisively, "Accelerate the advance, don't delay any longer!"

"Cross this Canglan Mountain today, but be careful, the distance between front and back is at most 1.5 steps, rely on each other!"

Accompanied by Gao Yang's order.

The army stepped forward against the weakening wind and snow.

Two hours later.

Finally.

The view in front of Gao Yang suddenly opened up.