It was five days before Zhao Xun was issued a cotton coat by the Black Turban Army, and everyone knew that the cotton clothes were used for winter, and immediately some people half-jokingly doubted whether it would snow, and was laughed at by everyone.

Zhao Xun naturally didn't believe it, he had been in Xianxi County for seven or eight years, and it had never snowed in winter, and he had hardly even seen frost, let alone snow.

So overnight sent people to the Tianjian of the Lingling Division to inquire about the stars, consult the historical classics and calendars, there was no record of snow in the capital for one hundred and fifty years, and the only seventeen frost falls also occurred in the middle of winter, as soon as the sun came out, the temperature rose at any time, so Zhao Xun probably did not believe that it would snow on such a hot day.

At this time, Bai Liyan (Wei Xian) said:

"Zhao Shuai, more than forty miles west of the Yongxing River, but there is Miaotian Mountain?"

"Yes, Mr. Wei is trying to say that the Black Turban Army wants to use demonic art to attract Blizzard to freeze to death our soldiers?"

Bai Liyan was not in a hurry to affirm what Zhao Xun said, but said for example:

"Has General Zhao ever climbed the Miao Tian Mountain and seen the sea of clouds?"

"Two years ago, I followed King Xian to worship the sky and climbed the Miao Tian Mountain. The mountain is quite steep and steep, up to more than 700 zhang, and it will be difficult to climb without the stone steps carved by craftsmen. The sea of clouds at the top of the mountain is majestic and breathtaking. ”

"That's it. Then Zhao Shuai can know that firewood is piled up under this pot, which can be seen the principle of water vapor. ”

"Ben Shuai naturally knows about this, but what does it have to do with Miao Tianshan?"

Bai Liyan smiled:

"The top of this Miaotian Mountain is far above the clouds, can the general know that this clouds and water are the same source as the water vapor in the pot?"

Zhao Xun nodded in affirmation of Baili Yan's words, he said

"I've seen the mist on the glass of Miaotian Mountain, and it makes sense that the clouds and water have the same origin."

"Then if you put a big fire on the top of Miaotian Mountain, use the sky as a furnace and the clouds as water, Zhao Shuai thinks, what is the result?"

Zhao Xun didn't know what he meant when he heard the news, and tried to imagine the scene of Miaotian Mountain, and was immediately taken aback:

"Could it be that it will be like firewood to boil water, and let the clouds turn into water and fall on the world?"

Bai Liyan nodded and said against her will:

"This way is a fire that smokes the eyes of the heavens and weeps."

"But, even if you can make the clouds turn into water and fall on the world, how can you turn into frost?"

"Then after the general climbs the mountain, do you want to wear cotton clothes?"

Zhao Xun was stunned when he heard the news, and suddenly realized:

"I see, Miaotian Mountain freezes at night, and tears are made by fire, which makes sense."

The so-called crying with fire is a lie compiled by Bailiyan in desperation. Where are there any eyes in the sky, it is really a helpless move that Zhao Xun can't understand the knowledge principle of cold and warm strong convection to produce rain and snow.

Bailiyan judged that the top of this Miaotian Mountain is above the clouds, and it should be below or below zero for most of the time throughout the year. In this way, there is no possibility of strong convective weather near the second sky.

Because the prefecture is located in the subtropics, the cold air comes from thousands of kilometers in the south, and it is impossible to reach the North Sea in summer, so the atmospheric circulation of the North Sea is in a relatively balanced state, and unless the atmospheric environment changes extremely badly, it is a rainy season all year round.

In order for rain to turn into snow and ice, it is necessary to drive down the cirrus and cirrocumulus clouds that are higher and cooler above the stratocumulus clouds at an appropriate height.

Cirrus clouds and cirrocumulus clouds are mostly more than 3,000 meters above sea level, or even 10,000 meters at sea level. When a fire is set on Mt. Myocheon, the hot air rises to the level of cirrus clouds and cirrocumulus clouds, and the heat exchange occurs between the cirrus clouds and cirrocumulus clouds in which the hot air contains a large number of ice crystals, causing the ice crystals to expand and lose their stable structure at high altitudes and fall.

When a large number of ice crystals fall to a cloud zone at a height of 2,000 to 1,000 meters, a large number of ice crystals are enveloped in water mist to cool down, forming snowflakes and even hailstones, resulting in snowfall.

As long as the fire does not stop, Cirrus and Cirrocumulus will theoretically carry the clouds containing ice crystals to the vicinity of Miaotian Mountain, forming a huge spiral nest, which can theoretically snowfall infinitely, so that the temperature near the Yongxing River will drop again and again until it is below freezing.

Of course, this cycle cannot occur indefinitely, and when the ground temperature is low enough, it will produce cold air effects and atmospheric vortices, blocking the alien clouds from the snow radius of the Yongxing River, thus gradually stopping this unnatural snowfall.

However, no one knows how long this snowfall process will last, and as long as the fire in Myohtensan Mountain does not stop all day, this snowfall and cooling process will continue until a regional vortex is generated to prevent cloud gathering.

If it had lasted for ten days and half a month, the Xianjun army would have been frozen into popsicles. Even if you bake a fire around a stove, it can freeze people to death at minus ten degrees.

These truths are equivalent to playing the piano to the cow to the people of the world, and they only think that it is the witchcraft of the Black Turban Army.

"Zhao Shuai, there is a chance that the snow will come true, and you should prepare early."

Zhao Xun had a gloomy face, not that he didn't believe Bailiyan, but that he was imminent, where to get hundreds of thousands of cotton clothes.

"Mr. Wei, since you have decided that there will be a blizzard, you have a plan to break the black turban traitor."

"This ......"

Baili Yan had concerns and wanted to stop talking, Zhao Xun saw the clue, he said:

"But it doesn't hurt to say it."

Xie Zhaoshuai trusted. I am worried that even if the black turban traitor's poisonous plan is broken, the morale of the army will be weakened. Zhao Shuai needs to know that this black turban army can make the sky snow, and in the eyes of many soldiers, it is like a god, and the next method can only be effective after the first snowflakes. Once the soldiers feel that the Black Turban Army can summon the sky to help in the battle, where will the hearts of the army go, Zhao Shuai has thought about it. ”

The Black Turban Army is nothing more than using strong convection to make the sky snow, and the only way to deal with it is to return it to its own way.

The reason why the clouds float in the sky is that the water molecules are smaller and lighter than the air, and the second is the air convection from the lower layers, which enters a certain height space, and this convection will intensify, so even if it stops at high altitude, the wind is actually very strong, and it is this convection that further drags the clouds to float in the sky.

The only way to break the game is to create a stronger upward convection on the ground at the beginning of a slow drop in temperature.

Thermal convection rises to the height of cumulus clouds and stratocumulus clouds, and interacts with ice crystals descended by cirrus clouds and cirrocumulus clouds, resulting in more intense super convection, which in turn heats up the ice and snow into water, which rains when it falls to the ground.

Thermal convection can be created either early or late, and hot air must begin at the beginning of snowfall.

As soon as the hot air goes up early, it is suppressed by the cold air, and late, the cold air is too strong, and it is useless to turn the hot air into cold air without waiting for the hot air to reach the clouds.

It is only shortly after the snow passage opens that the cold air begins to fall, at which point a fire creates a heat convection, and the cold and warm air convection slightly below the clouds. The best result is that the snow melts into the water, and the snow is invisible. The worst outcome is that the operation fails, and the snow falls correctly, and at most the end of the total army is avoided.

Of course, under strong convection, snowy clouds may be driven to other places by convection, and the transpiration of the Yongxing River happens to provide convective water vapor, which is also possible.

Therefore, the ultimate way to restrain snow is to gather firewood and set fire to the hinterland of the east along the Yongxing River, and artificially create a layer of hot air on the ground from morning to night, shielding the cold air falling from the sky, so that the snow will become invisible.

However, once the snow falls, what will the soldiers who have never seen the snowfall in the Xianguo country think, and the shock in their hearts is no less than throwing an atomic bomb, and at this time, the Black Turban Army will cheer miracles on the other side, and the morale of the Xian army will inevitably be frustrated, and the morale of the army will also be shaken. Even if Bailiyan broke the Black Turban Army's snow poison plan, ordinary soldiers would not think so.

"So Zhao Shuai, on the day of the next suggestion, when the whole line crosses the Yongxing River."

"Attack the Woody River?!"

"Yes, there will be a torrential rain on the day the plan is broken, and if the black turban army wears cotton clothes, they will take off their armor, and then there will be a torrential rain, and the more straw in this water, the heavier it is. The black scarf army's cotton clothes are too heavy, and the cold water is possessed, how can they fight again vigorously. If our army can attack the Yongxing River, it can give a powerful blow, boost morale, turn passive into active, and defeat the Black Turban Army for a while, so that the soldiers also know that people will be able to win the truth. ”

"Man is better than heaven!" Zhao Xun looked at it in surprise, and his shock at these four words was no less than the spirit of Daigo's empowerment.

But after thinking about it, after all, it is a mysterious strategy, in case it is a miss, but it is not Yin Yangcheng who fought against the water back then, and if he dies, he will die, this battle must not be a little wrong, and a little carelessness is the danger of losing the country, and he can't be careless.

"Mr. Wei, this plan is too dangerous, so there is nothing else to do?"

"If Zhao Shuai doesn't want to take advantage of the situation, he can take the risk of breaking the black turban military poison plan, but once the limelight passes, the morale of our army will be hit hard. Even if the army is not in danger, no one can guarantee that the Black Turban Army will have any poisonous plans under the pretense of providence.

Once or twice is acceptable, but if this is ten times or eight times, I am afraid that no matter how powerful it is, it will not be able to win the hearts of hundreds of thousands of troops. Even if not a single person dies, the army will collapse on its own. ”

Bai Liyan himself is not very sure about this matter, and he will definitely be able to stop the Black Turban Army from snowing, but the Black Turban Army occupies Miaotian Mountain, which has an absolute geographical advantage, as long as there is a skyrocketing fire, the probability of causing snowfall is extremely high.

In this case, if it fails, it will be enough to urge the army not to fight, and the battle will be defeated, and the morale of the army will be severely damaged if it does not fight.

Zhao Xun, as the commander-in-chief, must be responsible for the whole army and the whole country, if Bailiyan fails, someone must take responsibility, and then he is afraid that he will kill Bailiyan's head, and the hearts of hundreds of thousands of troops will not be recovered, Zhao Xun has to be cautious.

"This matter needs to be considered for a day, and tomorrow you will return to Wuping first, and you will give Mr. Wei an answer within five days."

"Okay, the last general is waiting for Zhao Shuai to decide."

Bai Liyan just turned around, suddenly remembered something, turned around and said:

"Zhao Shuai, there are two bags of things here, if there are any of the following offenders among the generals in the coming day, the generals can use this thing to deter the generals."

When the words fell, Bai Liyan took out two packets of potassium nitrate prepared in advance and handed them to Zhao Xun, Zhao Xun opened it and saw that it was two packets of white powder, and couldn't help asking:

"What is this?"

"This is a secret recipe for making ice, the general only needs to pour white powder into the water, and the water will freeze on its own."

"Shhh...... It has long been rumored that Mr. turns ice into money and makes money, and there really is such a secret recipe. ”

"Yes, but this method is poisonous to the general, and ice water must not be taken, because it will be poisoned. Therefore, the white powder is poisonous and should not be ingested. ”

"In that case, Sir is not afraid of poisoning people?"

Bai Liyan smiled, with a relaxed face:

"The ice that is sold below is non-poisonous ice, so it is edible."

"I see, this has helped Ben Shuai a lot."

Zhao Xun ordered someone to bring a basin of water and introduced a packet of potassium nitrate into the water, and after a while, the clear water turned into ice.

The poisonous plan of the Black Turban Army is actually a conspiracy, and I am not afraid that the Xian Army will know, just because the Xian Country is located in the tropics, it is impossible to have cotton clothes, even if the conspiracy of the Black Turban Army is discovered, it is only a matter of waiting for death. If they retreated, they would completely lose the Yongxing River barrier and be forced to fight a decisive battle with the Black Turban Army, not to mention that no one believed that it could snow on such a hot day.

However, the Black Turban Army also overestimated their own strength, and if the distribution of cotton clothes was carried out secretly and before the snow fell, the Xian Army would definitely be defeated.

How do you know that the sky is not as good as people, the Black Turban Army expects that their spells will not be able to be cracked, but they don't know that there is such a rare phenomenon as crossing parasitism in this world, and when they encounter Baili Yan, how can they hide such tricks.

At the same time, Bai Liyan couldn't help but wonder if the person who used this trick was also a parasite, otherwise how could he have a whimsical idea and set a fire on Miaotian Mountain to create strong convection. Unless someone who is proficient in the calendar and accidentally discovers the weather patterns in certain situations, and leaves some information for the present person, there is no way to explain this matter.