In fact, everyone underestimated Yi Nan's determination to make great efforts, and early the next morning he began his investigation of Shanyang City, which can be defined by the words "state visit" if it is in the future.

On a cold day, Sun Xiangfu didn't have the habit of getting up early, so he didn't accompany Yi Nan, for the stewards of all departments in the city, Sun Xiangfu had already explained, in addition to the vaults of the cabinet room and the top secret production technology of the major workshops, Yi Nan could let him see whatever he wanted, of course, those top secret production technologies, Yi Nan even saw it, and he may not understand.

His first stop was the off-site livestock trading market, which is also the largest greenhouse breeding area in Shanyang.

Nomads are no strangers to captivity, every winter, they have to find shelter for cattle and sheep, in the col with forage shed is what they have to do every year, however, their shed, compared with the old city of Shanyang, the kind of basically impermeable brick structure shed, the gap is simply too big.

As people who have lived half their lives in the herd of cattle and sheep, they will not dislike the smell of cattle and sheep, when Yi Nan entered the cowshed with his subordinate generals, the first thing he felt was a warmth, and he didn't smell any pungent smell.

"This cowshed is so clean, you have cleaned it up deliberately?"

Yi Nan turned to a Han steward who led him over and asked.

The steward pointed to a worker patrolling the cowshed with a cart, "Yes, we have special personnel to clean up the cow dung in the cowshed three times a day. ”

"You have so many cattle and sheep, how many people do you need to clean up!" Yi Nan asked in surprise.

"In this old city alone, there are nearly 1,000 people who are responsible for taking care of these tens of thousands of animals, of course, there are only a few hundred people who clean the dung, most of them are forage, and there are also people who process cow and sheep dung and grow mushrooms."

"Growing mushrooms?"

Yi Nan heard a new word again, in fact, in the Eastern Han Dynasty, the Han people mastered the cultivation method of mushrooms, Wang Chong recorded the cultivation method of mushrooms in the book "On Heng", during the Three Kingdoms period, the cultivation of mushrooms began to rise in the people, but the yield was not very high.

As a graduate student of the University of Agricultural Science and Technology who guided farmers to farm in the countryside in later generations, Sun Xiangfu simply came at his fingertips on the simple technique of growing mushrooms.

Fermentation of cow dung mixed with forage as a base can grow relatively high-yield mushrooms, of course, this is a kind of Yi man wants to learn, but also difficult to learn to go to the technology, for the control of room temperature, you need to calculate the size of heating fuel and heating space, when sprinkling, you need to calculate the amount of water, what the thickness of the soil cover, sunshine disinfection and other things, you want a barbarian state of people to understand, it is too difficult.

Those who are in charge of growing mushrooms are just doing some regular work under the command of a few people arranged by Sun Xiangfu, and they have been planting for two or three months, and they don't know why they are doing this, and no one can write down all the main points.

The steward looked at Yi Nan and asked himself, and replied, "Yes, the fresh mushrooms that Shanyang City eats now are all grown in our greenhouse, and the main use of mushrooms is cow dung. ”

After thinking carefully about the dishes eaten in Wangjianglou yesterday, there were indeed several kinds of mushrooms, and they were very delicious, Yi Nan immediately became interested in this mushroom, however, like the workers who worked here, he couldn't understand this thing at all, but he felt that it was too luxurious for the Han people to even grow vegetables in a warm house.

There are many places he doesn't understand, as a later generation, Sun Xiangfu knows too well the importance of cluster farming, disease prevention and epidemic prevention, although the ecological environment in this period is very good, the probability of disease in the cold north is not high, but the epidemic prevention work, Sun Xiangfu is full of effort.

It is necessary to keep the cattle shed and sheepfold clean, and regular scrubbing and parasite cleaning have never stopped, as long as these works are done, the probability of plague is extremely low in the excellent ecological environment without chemical pollution sources.

Yi Nan saw more than that, those feed with a little bit of alcohol, he couldn't wait to grab a handful and taste it in his mouth, because the cows that ate this thing were covered in meat, and those cows that were specially used for milking cows could actually squeeze out half a bucket of milk.

When did the Han people become more able to feed cattle and sheep than we nomads?

This question has been lingering in Yi Nan's mind for a whole day.

After seeing the city, Yi Nan went to see the outside of the city, this method of digging holes underground for cattle and sheep to spend the winter, only the Han people can do, they have enough iron tools and digging tools, enough manpower, they can quickly dig a big hole, but Xue Yantuo is difficult to do.

There is no need to burn any coal for heating in the hole, it is hot, although someone cleans up the manure, but the smell is slightly bigger than the greenhouse on the ground, but it is within the tolerance range of the cattle and sheep themselves, generally, a hole will not be dug too big, hundreds of thousands, separated and raised, responsible for taking care of the cattle and sheep in the hole, but also responsible for taking care of the vegetables grown in the low wall, the same is the very small number of Han people are responsible for technical management, the herdsmen only need to do what they are told.

The earliest tenants in Sun Xiangfu Shiyi are now almost all in various management positions, and with them maintaining on the scene, these aspects of Shanyang will not be chaotic.

In just one day, Yi Nan determined that Sun Xiangfu had the ability to protect cattle and sheep for the winter, Shanyang had been operated by him for more than a year, and there was the current situation.

The next day, Yi Nan still got up early in the morning, saw the way cattle and sheep were raised, and he also wanted to see how Shanyang City solved the livelihood problems of those herdsmen.

The industrial area of Shanyang Castle occupies almost a quarter of the entire city, and on the south side of the city wall is a tall brick house production workshop.

For Yi Nan's arrival, the steward here seems to have expected it, and he didn't need Yi Nan to ask more, so he began to introduce him to the situation of the workshop, of course, he was also afraid that Yi Nan didn't understand these things and couldn't ask the point.

He was the first to go to the leather workshop, and then he witnessed the whole process of a sheepskin, from the top to the table, to the whole process of turning into a sheepskin jacket, very quickly, and the finished product was beautifully made.

From which round faces, with traces of grassland wind and frost, Yi Nan recognized at a glance that these women were originally herdsmen on the grassland, they may be good at killing sheep and skinning sheepskins, but they definitely can't make the kind of sheepskin jackets that look very slim and warm after wearing, and the most important thing is that they could not have lined the sheepskin jackets in the past, let alone embroider on the sheepskin.

"Like this jacket Hu people like it very much, we Han people also like it, since the Hu people bought all our inventory, the orders of merchants from all over the world are squeezed here, just in the Guanzhong area, there are 200,000 orders, our workshop only produces 2,000 pieces a day, and it takes several months to finish it!"

Showing off his achievements in a complaining tone, the steward in charge of the leather workshop was very talented, and his words made Yi Nan very melancholy.

Out of the leather workshop, he went to the carpentry workshop, which had the largest number of people, and then he was dumbfounded.

Could it be that there is such a big gap between his Xue Yantuo Department and the Turks?

There are more than 10,000 craftsmen here, and all of them look familiar, and their appearance can be seen at a glance to be Turkic!

When did the Turks have so many craftsmen who can make Han farming tools and furniture?

Yi Nan looked here for a long time with doubts, and finally saw a little way, that is, all the people who work seem to only do the same, and then, after their process, will enter the next process, and the final product is exquisite, good-looking, and firm and easy to use.

Yi Nan felt that he had found some characteristics of the Han people's affairs, perhaps, he could also open such a workshop, for the people of Xue Yantuo to make boxes, chairs, rakes and other daily utensils, however, he thought of another problem, if you don't build a city, learn the way of life of the Han people, these things don't seem to need to be built, in the past, he never sat on a chair, he always spread a blanket on the ground to sit, now, only two or three days, I habitually sit on the chair, which will make him more comfortable.

Again gloomy walked out of the carpentry workshop, and entered the ironsmith workshop, which was supposed to be open to an outsider, but no one stopped him from entering, and even a steward was waiting at the door early in the morning, as if waiting for him to come and ask questions.

The ironware workshop in the city is only for civilian ironware, and it does not involve relatively high-end smelting knowledge, but even so, Yi Nan also watched here for an afternoon.

He did not miss all the process of turning molten iron into plowshares, iron pots, kitchen knives, etc., and he also asked his subordinates to remember with him, and when he was hungry and had to go back to eat, the steward's words almost made him fall on the spot.

"My Metropolitan Governor said that if the leader of Yi Nan declares himself a vassal to the Tang Dynasty, the Metropolitan Governor will open an ironware workshop in the city he helped you build, not only for foreign trade, but also for sending someone to teach you these fighting techniques until you know."

Iron production process, is not a secret at all, as early as the Han Dynasty, the Huns produced their own iron weapons, to this era, has made a lot of progress, Shanyang iron workshop this set of production mode, but to increase the efficiency of civil iron production, in Sun Xiangfu's view, there is not much value, after all, the grassland is lacking iron.

And the real high-end smelting process is in the workshop of the military camp, where the production is not iron, but steel.

In the next few days, Yi Nan continued to look down, spirits, perfumes, antifreeze, as well as coal, coal furnace production workshops, he went to see them, basically did not understand the same, because he had no basic knowledge, no understanding of why these scattered processes did this, let alone those special combinations.

The reason why Sun Xiangfu relieved him to see it was that when he learned all this knowledge and understood the principles, he would almost die of old age, and at that time, the Xue Yantuo Khanate he established was no longer a problem for the Tang Dynasty, a turtle that crawled hard will never be able to catch up with a horse that runs hard, not to mention, what Sun Xiangfu wants is just a time difference of one or two years.