The fighting in the city did not last long, and Wang Yu, who was watching the battle in the rear, was worried that the Bai Bo army would set fire to it after the victory, but he didn't know if it was because he had collected all the things that started the fire, or because the Bai Bo army did not have this habit. In short, although the killing in the city was terrible, there was no large smoke rising.

Wang Yu was relieved, turned his head and stretched out his hand, and said, "General Yang, the general trend has been decided, let's go into the city to have a look?" ”

"Uh, it's a good ......" Yang Feng has been sitting on the altar in a daze, stunned to answer, hesitated to stretch out his hand, but caught a glimpse of a few gray-faced old pawns under the altar, his heart moved, and politely refused: "It's better to let you enter the city first, so's legs are very sore, and he can't walk for a while, so it's good to wait for a while." ”

"It's fine." Wang Yu nodded and went into the city on his own. The evaluation of Yang Feng is a little higher, and this person's mind is still very detailed.

When Wang Yu walked away, Yang Feng jumped up from the ground with a carp, got off the altar in three or five steps, rushed to the front of the old pawns, and startled the old pawns.

"What the hell is going on in the tunnels? What exactly did you do? So how did the wall collapse? Yang Feng didn't care if the other party was surprised or not, and asked the question that had been held in his heart for a long time.

Because he was too uncomfortable to hold back for too long, after asking the question, he actually had a sense of comfort that he had been rescued from drowning.

"Huh? Yang Shuai ......" The old man subconsciously replied: "Well, it's the spell of the little heavenly master, the wind and hot wheels ......"

"Of course so-and-so knows it's a spell!" Yang Feng said very depressedly: "Eh, it's not this that I'm asking you, it's what he did in the tunnel before he did it?" From the beginning, the more detailed the better! ”

He doesn't want to be regarded as a person who is jealous of the virtuous and capable at this moment, after this battle, Wang Yu's prestige in the Baibo army is probably comparable to the Zhang Jiao brothers, and he is jealous of this kind of person, even if it is Qu Shuai, there is no good fruit to eat.

Yang Feng just wanted to get the truth of the spell by knocking on the side, such a powerful spell was in front of him, if he didn't try to learn the hand, wouldn't it be a tyrannical thing? Even if you can't learn everything, you can learn a little bit.

These old pawns were specially left by Wang Yu to help with auxiliary work, until the last moment, they were still in the tunnel, if in addition to Wang Yu, who knows this spell best, it is none other than these people.

"Before the practice? As you all know, the little heavenly master asked people to dig tunnels, saying that they didn't need to be too spacious, and that they could accommodate almost three or five people in parallel...... When he dug under the wall, he didn't let people dig too deep, but dug a few long gaps under the wall, and then he said that he wanted to find a few wooden boxes, and we didn't have time to do it, so we dug up a few coffins, and his face was a little strange at that time, but he didn't say anything......

The old pawn's narrative is a little messy and trivial, but Yang Bong is not impatient, and years of experience have taught him that the truth is often hidden in the details.

In other words, the circle is set under the base of the wall, and it is to be made of wooden boxes...... Well, wood makes fire, that's true, but fire makes earth, where does this wind come from? How did fire break through the walls? It's weird, you wait, write a note ......."

Yang Feng's learning attitude was very serious, and several old soldiers looked at each other, but there was a trace of disdain in their eyes. Want to learn the immortal method of the little heavenly master? Don't look at what qualifications you have? After being a marshal for so many years, I haven't learned it, can I succeed by following the cat and the tiger?

Those who can learn the immortal law are all people of destiny favored by God, just like the great sages and good teachers of the past, where can anyone follow them?

After thinking about the previous content and thinking about it, whether it was understood or not, it was all in his mind, and Yang Feng asked again: "Then what?" ”

Then, there were a few ignition leads, which were soaked in oil and were more than a dozen feet long...... Finally, the section of tunnel that turned horizontally under the city wall was sealed with bricks and stones, and it was done. And then this morning, as soon as I heard the signal of the little heavenly master, I immediately lit the fire......"

The old pawn suddenly patted his head and smiled proudly at a few companions: "Uh, by the way, the little heavenly master also asked people to dig a hiding hole in advance, and told us that after lighting the fire, we will immediately drill into it and use thick wooden planks against the hole opening...... At first, Lao Wang and the others were not convinced, and they wanted to run out, but they were pulled in by me, what was the result? Little Heavenly Master's spell is really powerful, right? ”

"Isn't it? Brother Zhang saved everyone's lives this time. The other people also had no words to praise, and in amazement, there was a little palpitation.

Yang Feng can understand that the fireworks that erupted from the entrance of the cave later have already explained everything. A few hundred steps away, the aftermath has such a momentum, and the person or thing that bears the brunt of it can have other fate besides being shattered? Isn't the wall of Yuncheng proof of this?

Although he hasn't checked it yet, after a few glances from afar, Yang Feng can make an approximation.

The city wall of Yuncheng is a few points thicker than that of Bai Bolei, more than three zhang! And the material is not the same, the one in Bai Bolei is an earthen wall, which is much worse than the wall of Yuncheng masonry, and what kind of huge strength is needed to blast such a city wall into the sky? There really is no other way to explain it other than spells.

"The problem may be...... What the hell was in that wooden box? After thinking about it, Yang Feng came to a conclusion.

The old pawn shook his head in unison: "It's nothing special, it's just the usual practice, those things that make runes, salt, nitrate, sulfur or something, it's very ordinary......"

"Nothing else?" Yang Feng was also puzzled.

These things are indeed very ordinary, salt and sulfur are all fire-causing things, and they must be used in the practice of opening the altar, in addition, salt and nitrate are also one of the main raw materials of Fu Shui, if the situation allows, the Yellow Turban Army in various places will have these things in the army.

Hedong, Bingzhou, Yong, and Liang are all rich in this thing, and the Bai Bojun took advantage of the geographical advantage, and the reserves are particularly sufficient.

This time it was called by Wang Yu, it seems that the art of wind and fire is indeed related to these fire-causing things, but this is also a normal phenomenon, even if it is the three brothers of the great sage and good teacher, when doing it, they also need some mediums, rather than summoning the spell out of thin air.

"Something else? It's hard to say. The old man surnamed Zhang shook his head thoughtfully, but refused to speak, Yang Feng understood at a glance, immediately waved his hand, and said: "If you know something, say it quickly, and when you turn around, your family will choose a hundred acres of land first." ”

"Xie Yangshuai!" The old man surnamed Zhang was overjoyed, but several other people shouted that they didn't follow, and Yang Feng allowed more than 100 acres of paddy fields one after another, and everyone stopped.

When Wang Yu recruited people, he clearly said that if he was not afraid of death, he would really die in the tunnel, and he would be given a heavy pen. Now that a few people have come out unharmed, Wang Yu has entered the city, they don't know if the heavy reward can be cashed, and they are panicking, but they didn't expect that selling news is so profitable.

Several people are making up their minds in their hearts, after this big victory, the hometown of the Wei family from Yuncheng to Yongji will be occupied, and the army will have a place to recuperate, and there should be no need to live a precarious life.

At my age, there is no need to continue to eat in the army, beg for some fields to plant, and tell people about the experience of these days, the days must be very tasteful, right?

"Inside the coffin, there must be something else." The old man surnamed Zhang is indeed a caring person, and he noticed a lot of details that others did not pay attention to: "The salt, nitrate and sulfur sent into the military tent of the little heavenly master are a total of several hundred catties, and by the time he packed the box and carried it out, it had become ten coffins, each weighing one hundred and ten catties, which weighed ......."

"Nearly doubled!" Yang Feng's eyes flashed. Obviously, there was something else mixed in there, and he pinched his chin and fell into deep thought: "What is it mixed with?" ”

"Yang Shuai, don't blame the old man for being so talkative." The old man surnamed Zhang persuaded earnestly.

"This inheritance of the Dao system is not ordinary, how can the secret of the little heavenly master be revealed at will? Besides, this kind of thing also depends on chance and qualifications, back then, the great sages and good teachers accepted so many apprentices, and in the end, how many of them inherited the true know-how? Not a single one! Otherwise, the brothers everywhere have gone through so many dangers over the years, how could the Yellow Turban Lux not reappear until today? ”

"Makes sense." Yang Feng was relieved, he found that he was indeed a little obsessed.

This kind of spell, even the great sages and good teachers don't understand, how can they learn it as soon as they learn it, qualification is the most unattainable, or stick to Zhu Yuanjun and capture the remaining four dock forts of the Wei family.

Turning his head to look at the old man surnamed Zhang, Yang Feng commanded in a deep voice: "You are good, you will be a counselor in a certain army in the future." Now, you go and gather people and collect salt, salt, sulfur, the more the better, you know? ”

The identity of the Yellow Turban Army has brought a lot of helplessness, and talent is a major constraint.

The Wei family wants to find a staff, as long as the news is released, local or foreign celebrities and celebrities will flock to the threshold and break the threshold, but Yang Feng will not have this treatment, celebrities will definitely not have it, at most, between the ranks, find a few relatively flexible brains to come out.

"Whoa!" The old pawn was overjoyed, hurriedly agreed, and then pulled a few companions and began to assign tasks.

Although Yuncheng is down, the Wei family still has four big dock forts and more than ten small dock forts, although the little heavenly master is incomparable, it is difficult to defend his family and live up to the stubborn resistance, and the preparation for casting spells must be sufficient.

Seeing that the new subordinates were able to do things well and were very disciplined, Yang Feng, who was disappointed, was not without relief. Looking around, his heart was full of pride, with this fertile soil between the two rivers, the voice of the Bai Bo Army is bound to spread all over the world, so that the official position of the imperial court will definitely not be small.

Of course, before that, we must serve the envoy of the imperial court, Zhu Xiaotianshi!

Yang Feng made up his mind not to find out the roots, but to hide the secret in his heart, as if nothing had happened. With that in mind, he walked briskly towards the city.

……

"The power of the primordial black powder is really ordinary." Standing in front of the gap in the city wall, Wang Yu shook his head: "I put nearly a thousand catties of gunpowder, and I only blew up such a small hole, if it weren't for the good work of incitement, and I was able to pretend to be a ghost, it would be really hard to say whether the outcome would be true." ”

Saltpeter, sulfur and charcoal, Wang Yu stuffed it in the coffin, and the only thing used for blasting was, of course, black powder.

The first two materials have been widely used in this era, and charcoal is even more commonplace. After studying the siege tactics that the Yellow Turban Army is capable of, launching underground blasting in the mode of cave attack has become the only choice for attacking Yuncheng, which is also the most feasible strategy.

Now it seems that the effect is very mediocre, if you use more advanced explosives, with the layout at that time, maybe half of the city wall will collapse.

Of course, the effect is insufficient, in addition to the limited power of gunpowder, the solidity of the city wall may also be one of the main reasons, these factors must be taken into account next time.

Still, the overall effect is good. Wang Yu nodded, even if this move can't cause decisive damage to the city wall, it can play a considerable role in the growth and decline of the morale of both sides, and it is basically very good.

Wang Yu was not ready to promote gunpowder, the basic technology of this era was not mature enough, and it would take a long time from promotion to application.

Since it doesn't help much to improve technology and productivity, it's better to keep it in your hands and use it as a secret weapon for siege and use it at critical moments.

After determining the effect, Wang Yu did not delay much, walked leisurely, and walked towards the city, the battle has ended, and now it is time to review the results of the battle.