Gao Yuan was fighting with the enemy with a spear in his hand, Gao Yun hid behind Gao Yuan, but there were more and more enemies coming towards Gao Yuan, Zhou Nan looked at the blood veins, the knife in his hand was just about to be pulled out, an alien cavalryman jumped off the horse, and pressed his right hand to draw the knife, Zhou Nan was in a hurry, exerted all his strength, struggled hard, and suddenly loosened his wrist, Zhou Nan found himself sitting on the bed, the oil lamp on the wall was like a bean, it turned out to be a dream.

Zhou Nan looked left and right, Gao Yuan was still sleeping soundly in bed, and it was silent outside like a dark night. Zhou Nan relaxed, lay down again, looked at the roof, but couldn't sleep.

It's already the middle of April, and in a little more than a month, I'm afraid this place will not be a pure land outside the world; In the following days, the Song and Liao armies fought twice, and in October, the Jin army invaded Yanjing City from outside the Guan, and lived until April next year, because the Jin army was very unsuitable for the hot summer, and bargained with the Song Dynasty, so that the Song Dynasty took out 200,000 taels of silver, 400,000 horses of silk, and 1 million copper coins before withdrawing. After the Song Dynasty spent a lot of money to buy back this Yanjing City and the nearby four prefectures of Jizhou, Danzhou, and Shunzhou from the Jin Army, they had nothing to do in the takeover area, and sent a eunuch to manage Yanjing City, because people who were in the imperial examination did not come to this wild place at all, even if the emperor issued a holy decree, he was looking for a reason to stay in the capital. It has made the people of Youzhou and some nearby states and counties miserable, even worse than in Liao. Because the Song Dynasty from the emperor and the ministers felt that the people in these places in Youzhou were included in the Great Song Dynasty, weren't they grateful to Dade? So all kinds of tricks were taken out, saying that it was tax reduction, but it was actually heavier than the tax in Liao. Guo Yaoshi, a traitor who has been the most badly rated in history, "three dynasties with one body", has already surrendered to the Jin army to offer Yanjing City, and the emperor of the Song Dynasty is still pondering the title of Guo Yaoshi as the king of Yongzhen Yanjing, which has become a joke in the Jin army.

is still this Guo Yaoshi, relying on the Song Dynasty's dependence on him, openly asking the Song court for food and salary, and secretly conniving at his subordinates to plunder caravans. Even the Song Dynasty's ace troops, the Western Army, were about to be pushed aside. You can imagine how chaotic the surroundings of Yanjing were at that time.

As a result, after two years of chaos and disorder, in October 1125, after the Jin army digested a large area of the occupied Liao State, it finally couldn't bear it anymore and found an excuse to launch an ancient version of the "Lugou Bridge Incident", and the troops began to attack the Song Dynasty in two ways.

It's April now, and this chaotic state is about to begin, and now Zhou Nan is only a little more than a month to prepare. Just like the army that appeared in his sleep, the army that came like a tide was simply something that this cottage could not resist. What Zhou Nan could bring to Sanssouci was to store enough food in the cottage during the period from the Jin army's invasion of Yanjing City to the withdrawal of the second year, arrange the preparation of food, clothing and other things, reduce the contact between the cottage and the outside world, and even close the mountain road when necessary, making this Sanssouci a closed paradise.

Now there are people in the cottage who have land, there are crops to cultivate in the spring, and they can be harvested in the summer, there are wild animals in the mountains to hunt, and there are mountain streams that are continuous all year round, so drinking water will not be a problem. There are accumulated cloths and furs in the public treasury, and now the Family Protector is also steadily practicing, and Zhou Nan is no longer worried about these things. The matter of steaming wine has also been handed over to Lao Zheng Tou and Shen Ding, and it can already be steamed normally, all that remains is to let Gao Yuan arrange for someone to transport it to Yanjing City to sell, anyway, before the Jin army invaded Yanjing City in October, Yanjing City was basically stable, and there were many Khitan nobles and high-ranking officials in the city, and there was also a wine market.

So the only other thing Zhou Nan cared about, and the only thing he couldn't rely on, was that he asked Guo Xingzu to make gunpowder weapons.

At this time, people like Guo Xingzu and others were just called fire bombs, tribulus fireballs, and fireballs, but in fact, just by listening to the names, you can know that these are just explosive firearms, and they have not yet reached explosive lethality. To put it bluntly, it is bluffing, at most like a poisonous fireball, with something poisonous added to it, and the poison is used to kill and maim the enemy.

Just like the last time, when he checked the craftsman's skills, he learned that Guo Xingzu was a craftsman made of gunpowder in the Song Dynasty Tokyo City, so he asked Guo Xingzu to try to make one for him to see, but Guo Xingzu tinkered for a few days, found a mountain col, lit a thunderbolt for him to see, but the fire and smoke were amazing, and in addition to this, there was not much power, but the next day the cottage spread the joke that there was a mountain demon in the mountains.

So he was tired and had to ask Guo Xingzu specifically, this was the only craftsman in Zhou Nan who had asked about specific things among the eleven craftsmen. The request he made to Guo Xingzu was to try to make "Earthquake Thunder", and asked Guo Xingzu to find raw materials from the cottage to make gunpowder, instead of buying raw materials from outside the cottage to prepare gunpowder like the first time he made the Thunderbolt.

Zhou Nan didn't want to do that kind of stupid thing of "having no dragon slaying skills, but no dragon slaying knives".

Therefore, what he asked Guo Xingzu was to first find the raw materials needed to prepare gunpowder from the cottage. Instead of sending someone out to buy raw materials when they need it in the future, they end up helpless because they don't have raw materials.

Early in the morning of this day, Zhou Nan was watching Gao Yuan and their drills in the playground, and Guo Xingzu, a craftsman made of gunpowder, came to him with a sad face, still holding a piece of paper in his hand. As soon as Guo Xingzu saw Zhou Nan, he bowed to Zhou Nan with a shameful face and said: "The big village master, the small one is really ashamed to treat the big village master well. ”

Zhou Nan saw that it was Guo Xingzu, and knew that it must be for the production of gunpowder, and there were many people on the playground, so Zhou Nan patted Guo Xingzu on the shoulder, didn't say anything, and walked forward. Guo Xingzu didn't ask much, just followed behind. Zhou Nan led Guo Xingzu to the wall, and walked east along the wall. Because it is normal time, there are only guards at both ends of the walled wall and a few places at the gate of the wall, seeing Zhou Nan coming up, the guards of the family guard immediately greeted Zhou Nan Station, Zhou Nan smiled and nodded. When he came to a place where no one was, Zhou Nan turned around and asked Guo Xingzu, "But what about gunpowder?" ”

Guo Xingzu still had the bitter gourd face, and said to Zhou Nan: "The little one is really ashamed of the big village master. That Shen Ding and others can contribute to the cottage, only I ...... A few days ago, the owner of the village instructed that the raw materials should be found from the cottage, and the small ones worked hard to find only these, and nothing else could be found. Saying that, he handed Zhou Nan the piece of paper, Zhou Nan took it, and saw that there were several rows of words written vertically with a pen, although it was crooked, but it was also written with heart, Zhou Nan roughly counted, and there were nearly twenty kinds of material names.

Zhou Nan was taken aback, what kind of advanced formula is this? Could it be that the gunpowder formula in the ancient history books was added by later generations? Or is it for the sake of secrecy that has been handed down a reduced version of the gunpowder recipe?

According to the formula in Guo Xingzu's hand, he can simply open a crude medicine shop.