When he was young, all the generals gathered in the Chinese military tent:

"Ladies and gentlemen, I have just reported that the defenders of Calezer opened the west gate and let the people flee west. The general judged that General Gongliang had succeeded in the south, and it had become a climate, and the people of Jin Xuedi intended to fight a decisive battle under the city, and opened the city gate to let the people go west. Therefore, the general is determined to lead the army to avoid the battle and go south to join General Gongliang, what do you think? ”

After speaking, the generals under the tent were discussing, and Lu Gao stepped forward and said:

"General! Our army still has a large number of women, new subjects, children and young children, and countless cattle and sheep, and the withdrawal of troops at this time will be extremely difficult, I don't know how the general will withdraw his troops? ”

"What General Lu said is extremely true!" Sikong Nan said: "Our army is a lot of burdens, withdraw at this time, the march will be extremely difficult, Jin Xuedi people will definitely chase and kill behind, so that our army is passive, please think twice." ”

Bai Liyan stood up at this time, took out his horizontal knife, drew a sketch on the ground, pointed to the sketch and said:

"This is the camp of our army, there are 70,000 barbarian troops in the east, and Calezer in the west as a shield, our army is sandwiched between the two places, after several days of preparation, the Jinxuedi people have 40,000 or 50,000 troops in the city, even if they are farmers, but if we are surrounded on all sides, the situation of our army will become extremely unfavorable.

At present, we have not received any news from General Gongliang, so it can be assumed that Gongliang's army is still far from our army, so if our army cannot break through, it will soon be surrounded by 1560,000 men on all sides, and the civilian army of other small cities nearby will also arrive, and the situation will be even more unfavorable to us.

In order to smoothly withdraw the army, the general decided to provoke the city in the future, concentrated all the soldiers and horses in the city of Jinxuedi under the eastern city wall, and at the same time blasted the Kaleze city wall to create chaos, so as to facilitate the withdrawal of our army.

When the troops were withdrawn, the army formed a square formation, and the new vassals and women, children, and teenagers withdrew with the army in the formation, and all the baggage that could be taken away collided with horses and unicorns, and pigs, cattle and sheep and other slower domestic animals could not be transferred quickly. ”

"There is still one thing that is not clear about the last general."

"General Lu, please speak."

"Even if it can blow up the city wall and create a temporary chaos, it will still not be able to inflict heavy damage on the Jinxuedi people, if they stabilize their position to chase, our army is still very passive and difficult to get rid of the pursuit."

"Then create a big bang that Jin Xuedi people will never forget! Blow up most of the walls and bury them under the city. ”

When the generals heard the news, they were incredible, and Sikong Nan stepped forward and said:

"The wall of the East Gate of Calize is less than ten miles long from north to south, and our army has only dug four tunnels, even if we can blow up these four places, we will not be able to collapse the wall of the East Gate. I don't know if the general has any other way? ”

Bai Liyan grinned coldly on his face, faintly revealing indescribable ruthlessness, and he said:

"Tonight, immediately expand the cave at the end of the tunnel, dig along the north and south of the city wall, the width can be one zhang, one day and two nights, dig as much as you can dig in the north and south depths, after digging, add another hundred catties of gunpowder to each cave, and stuff as much flour as you can with it, and the tighter and fuller the stuff, the better."

In a word, he was even more confused, and Lu Gao asked without confusion:

"General, what's the use of piling up flour?"

Bai Liyan's gaze turned to Jiang Jie:

"Jiang Jie, go to the camp to get a bag of flour, a long spoon, and a long spoon with a wooden stick."

"No!"

When Jiang Jie left, Bai Liyan put a torch on the ground between the people, and then sat on the table, waiting for Jiang Jie to take the flour.

After a while, Jiang Jie took the flour and a long spoon, Bai Liyan opened the noodle bag, reached out and grabbed a handful, confirmed that the particles were delicate and dry, and said to everyone:

"Please step back a little so that you don't get hurt."

As soon as the words came out, the generals were even more confused, and each took three steps back to stand in the distance, quietly watching the changes. At this time, Bailiyan took the flour bag aside, scooped out a spoonful of flour with an elongated iron spoon, and turned it upside down with a spoonful of torches on the ground.

The moment the flour touched the flame, it exploded with a bang, igniting an astonishing fire, and the generals were shocked when they saw this, and they were stunned that they were all dumbfounded and shocked, no one dared to look at each other, and the flour that people and animals eat harmlessly in their stomachs on weekdays can also explode in an instant.

Handing the long spoon to Jiang Jie, Bai Liyan was already confident, and he said calmly:

"Ladies and gentlemen, this is a spoonful of flour, if it is a hundred stones, a thousand stones of flour, you should know very well what the result will be."

The tent was silent, and all the generals were shocked by what they had just seen, and after a moment of silence, Lu Gao took the lead in expressing his position:

"The last general obeys the general's orders!"

"The last general seconded it!"

Sikong Nandao, and then all the generals expressed their positions.

"Okay, starting tonight, step up loading baggage, dig the cave, and prepare to evacuate in two days!"

After the account was dispersed, Bai Liyan took the pen to give the Kaleze defenders a battle letter, and when he saw Bai Liyan shoot Jin Xue Diwen, Jiang Jie said with a smile:

"General, you can't make a mistake in your brute words."

Bai Liyan raised his head and stopped writing and said:

"Jin Xuedi's writing is actually very simple, very methodical, very easy to learn, as short as two years, as long as three or five years can be learned, it is not a difficult task."

"Then subordinates can also learn?"

"Well, forget it. You are not this material, you are good at counting, and it will be good for you to learn more in the future. ”

"Oh......"

Jin Xuedi's humanoid style is very simple and regular, and the strokes of each word have their pronunciation combinations, and you can read the sound when you see the words. However, the congenital defects of this kind of writing are very serious, and the expression efficiency and information content of the text are extremely narrow.

The original text is a simple hieroglyphs, and the pictographs have the same magic, the efficiency of text expression is extremely high, Jin Xuedi people translate the Central Plains literature, a large number of new words are created to express, with the emergence of new concepts of new things, Jin Xuedi people express the language system of new things with new words, because they cannot use the existing words to express new concepts, they need to constantly create new combinations of words to express the new belongings, this kind of writing will collapse with the explosion of information.

Although it is easy to use, with the development of technology, the accumulation and expansion of systematic knowledge, and the emergence of professional fields, their language will be difficult to carry the increasingly large amount of information and decline.

After writing the battle book and reading it again to confirm that it was correct, Bailiyan took an arrow cluster, trapped it on the arrow and handed it to Jiang Jie:

"Find a marksman and shoot this war book into the city with a strong bow!"

"No!"

"In addition, charcoal is smoldered, and it is crushed into a fine powder mixed with flour piled into the caves under the city, and it is important not to get wet."

"My lord, why is that?"

"The reasoning in this is complicated, and it is difficult for you to understand it now, so don't ask more questions, and send this letter out as soon as possible."

"Oh......"

Flour explosion is a very simple principle, is a common dust explosion, when the flour particles are heated and expanded, carbon molecules reach the ignition point and burn rapidly, and the flour particles reach the critical point of deflagration density, deflagration will occur.

When the magnitude is large enough, due to the decrease in the relative density of oxygen, the rapid expansion of flour particles, combustion turns into thermal rapid expansion, causing a large area of particle deflagration, and then into combustion explosion.

All dry fine dust will theoretically explode, aluminum powder, cotton, coal dust, and even ordinary PM2.5 dust particles, as long as the concentration saturation zero point is reached, and the air is dry enough, a fire center can quickly ignite the explosion.

At the moment of the detonation of the gunpowder, after the local city wall collapsed, the flour within the explosion range of the gunpowder was quickly thrown into the air and deflagrated, triggering a second explosion, thereby detonating other flours again, and then creating a chain explosion to form a larger scale and stronger impact.

Bailiyan was worried that the gunpowder was not enough to completely detonate the flour, so it was necessary to mix the flour with toner, which is more likely to reach the saturation threshold and lower ignition point than flour. The alcohol clay pot buried in the gunpowder room will also quickly deflagrate and volatilize in the explosion, which in turn will promote the combustion of carbon.

As the energy enters the cyclic reaction, the explosion will continue to consume more combustibles and combustibles until the amount of material continuously consumed in the relative space is reduced to a safe order of magnitude.

Jiang Jie took the arrow, ordered the marksman to approach the outside of Calezer City, and shot the arrow tied with the war book into the city, and the war book was quickly delivered to the barbarian general Yabuk.

"Your Excellency Commander-in-Chief, the northerners are really rampant, and they dare to issue a war letter to us, and they should be taught a hard lesson!" Nasdepo, the administrator of Calezer, said viciously.

Yabuk frowned, and a suspicious look appeared on his face:

"No, there's a problem with that. One of their men and horses swept through hundreds of thousands of untouchables, and the northerners outside the city asked for a fighter at this time, there must be a problem and they couldn't fight. ”

"But if it drags on like this, this year's spring ploughing is about to end, and if we let them plunder our land, what will happen to the more than 200,000 people in Calezer."

"The untouchables are a rabble, but the northerners in front of me are real armies, very cunning, and I can't take that risk until I find out their intentions."

Yabuk flatly rejected Nasdepo's request to send troops, and he knew very well that neither the Central Plains army outside the city nor Gongliangwen, who was heading south, were ordinary people.

"Immediately send an order to the whole city, strengthen vigilance, the northerners must have something abnormal in the past few days!"

"It's not that serious."

Nasdepo disagreed, and in a blink of an eye, Yabuk angrily rebuked:

"If you don't want their heads to be cut off and hung on the city, do as I say."

"Yes, yes, I'll do it right away......"

Nasdebo turned to leave, and Yabuk looked at the war book in his hand again, the war book was not signed, but the handwriting was the handwriting of the Central Plains.

"Not a good sign......"

Secretly saying in his heart, Yabuk put away the war book, wrote and repaired a book, and sent it to the camp of Nakikas together with the war book overnight.

At the same time, the coalition forces stepped up the excavation of the cave, and Bailiyan personally went deep into the cave to arrange the detonation route. A total of four caves, from north to south are distributed under the city wall of the East Gate, in order to delay the Jin Xuedi people to follow the pursuit, the explosion needs to create enough chaos and casualties, shake the morale of the army, especially at the moment when superstition is prevalent, "unjustified disaster" is undoubtedly an excellent means to hit people's hearts.

The four caverns will eventually explode in order, with the first and second at an interval of a quarter of an hour, the second and third at an interval of half an hour, and the third and fourth at an interval of three hours. Of course, the delay cannot be accurate, after all, there is no timekeeping device at the moment, and in most cases it is a gross estimate, and the larger the time value, the greater the error.