At the home of Wang Yiyong, deputy envoy of the Privy Councilor, Du Zhongxiao directed a group of servants to steam wine, and Su Song stood aside and watched.

Everything was about to stop. Du Zhongxiao and Su Song sat down under the tree in the shade, watching the people in the Wang family busy and talking about gossip.

Su Song said: "I heard from someone that Wu Kejiu, who came from Xuzhou with you, has also helped the ministers in the court to steam wine these days. This person is very well-behaved and I don't know who he has asked. In a few days, he will go to the mansion of Lu's house and say it whenever he sees."

Du Zhongxiao said lightly: "Let him go. Is this a good job? We scholars don't study hard and help wealthy families do these miscellaneous things, which is a waste of time. Although every family has Xie Yi, how can I make this money when I come to the capital?"

Su Song said: "I heard from Brother Du's opinion, this is annoying. Yet, some families are fine, they can give advice and broaden their channels, while some wealthy families just give some money, so they don't have much meaning."

Du Zhongxiao took out a booklet from his arms and handed it to Su Song: "How to steam wine from wine lees? I wrote a booklet and gave it to the court in a few days. This matter has been settled. From then on, the court collected wine lees from various families and made wine by the government, so I didn't need me to do it. This time I came to Beijing, I was just a student who traveled to visit and bought some books that were difficult to see in prefectures and counties. These days I lived in Daxiangguo Temple, and I bought almost all the books I could buy. The scholars who spoke were just Brother Su and I had several people. It was not very interesting to stay in the capital."

Su Song nodded and took the booklet handed over by Du Zhongxiao. He has been a child and has a lot of knowledge, not just a collection of classics, history, and literature, but also a variety of miscellaneous studies. Du Zhongxiao's utensils are constantly improved, and many things are very interesting. Su Song is interested in technology, so the two of them come together.

After rummaging through the booklet for a while, Su Song said: "It is mentioned here that the top of the steamer should be empty, the bamboo tube that attracts the wine should be thin, and the wet cloth that wraps the bamboo tube should be replaced. I think you didn't do this when you first steamed wine, and I don't know why it changed it to this?"

"In the pot, wine and water are mixed together. When it is heated, it becomes water vapor. The water vapor has wine and water. The station is large, so the top of the steamer should be empty and the wine is filled and mixed. The bamboo tube should be fine, so the water vapor will come out of the steamer and become dense in the bamboo tube, which will easily condense into wine. The water vapor should condense into wine. One should be dense and the other should be cool. Therefore, the wet cloth wrapped around the bamboo tube should be replaced at any time to be useful."

The wine production is actually the process of steam condensation. Cooling is on one hand, and volume compression is on the other hand. Therefore, the steam comes out of the steamer and quickly enters the thinning bamboo tube. The cooling effect of the wet cloth greatly improves the efficiency of the wine production. This is the inertia of Du Zhongxiao's previous life thinking. If you keep doing this, you will habitually improve. Therefore, Wu Kejiu learned the method of Du Zhongxiao's wine steaming, but the efficiency and quality are always far inferior.

But this matter is not very meaningful. Du Zhongxiao did it for more than half a month and then didn't want to do it. Every time he gave a steamed wine, he would give a gift, which was very expensive. But Du Zhongxiao came to the capital to make money, but for studying abroad, how could he do such things every day?

But Wu Kejiu was envious, especially when he took this opportunity to meet many officials in the court. After all, he couldn't help but recommend himself to steam wine for others. Du Zhongxiao didn't need to let Wu Kejiu use his own technology to be a good person, so he simply wrote the technology into a booklet and waited for the right time to present it. According to the habit at this time, the Du family's monopoly position in the Xuzhou area was at least unbreakable. With a restaurant as a foundation, Du Zhongxiao would not have to worry about food and clothing in this life, and could use all his energy to his future.

In this era, big businessmen are useless. Not to mention whether they can keep money by making money, it is difficult to do daily business. At this time, business is not centered on merchants, but on fangs. Similar to Du Zhongxiao's previous life, the most similar market is a market like renting a house. The one who truly grasps the lifeline of the industry is an intermediary, not a person who has a house or rents a house. The person with a special identity and close contact with the government, and Du Zhongxiao's business experience in his previous life is basically useless.

If you want to build an industrial and commercial empire in this era, at least it is not possible now, and neither reality nor law allows it. So your family business is stable, Du Zhongxiao thought about the Jinshi because this is the only way out in this era.

Su Song had a natural interest in technology. While flipping through Du Zhongxiao's booklet, he asked about technical details. Du Zhongxiao explained patiently, but he was not impatient. This is a great scientist who left his name in later generations. What is rare is that he came from a family of officials and made friends with him.

After reading the booklet, Su Song got up and went to the place where the wine was steamed, read it carefully, and remembered the technical details in his heart.

Du Zhongxiao sat on the chair, picked up the poems and essays from the previous imperial examinations I bought a few days ago and read them casually. The reference books for the imperial examinations at this time are roughly divided into two categories. One is the real questions that started from the Tang Dynasty, and the excellent works of the poems and essays of the students in each imperial examination. The other is the writings of scholars, some based on historical questions, and some write their own questions. Reading these articles is a real exam-oriented education, which is much more useful than memorizing the classics. There are only a few classics in the imperial examinations. In Du Zhongxiao's opinion, there is no need to work too hard.

After seeing it, Su Song suddenly said, "As Brother Du said, the water becomes water vapor when it is hot, and the space it takes up becomes much larger. So, what if it is a closed pot, just heat it up? Could it be blown up?"

Du Zhongxiao was stunned when he heard this, and then laughed: "Eight out of ten will blow up. If you have time, Brother Su can give it a try."

When it is closed and heated, the steam expands when heated. As long as the seal is well enough, it will certainly explode. If it is opened and closed, it is the most primitive steam engine. Du Zhongxiao studied engineering and of course knew that the steam engine in history had actually developed for a long time. Watt only made sufficient improvements to make the steam engine a general power, thus opening up the industrial age.

It is not difficult to make a primitive steam engine, but it is too low in efficiency and not very practical. In this era, there are actually no difficulties that cannot be overcome. It is just that it can be achieved at any point.

This is quite interesting. Du Zhongxiao put down the book in his hand and closed his eyes for a while. The boiler can be cast, and the technology of casting a large bell can be made or forged. If necessary, brazing technology is used. The most difficult thing is sealing, especially steam sealing, which must be resistant to high temperatures. However, the technology for making brass is mature at this time. You can use brass to make a sealing gasket, which can withstand higher pressure.

After thinking about it carefully, Du Zhongxiao felt that it is actually feasible to build a steam engine by hand, but it only takes a lot of time and energy. Of course, sufficient material support is even more indispensable. With a steam engine, it is not necessarily possible to start the industrial era. Industry needs the support of the entire social system and requires the development of the entire society to a certain extent. However, with a steam engine, a large number of problems in this era should be solved.

Opening his eyes, Du Zhongxiao looked at Su Song and couldn't help laughing. The person in front of him was a technical maniac of this era. He didn't have the energy to do this, but Su Song might not have it. As long as he told him the principle, Su Song didn't know where he would go. He had to stay in the capital for a while, so why not discuss this issue with Su Song and build the basic principles framework first. As for when it will be able to bear fruit, only God knows that Du Zhongxiao needs to pursue his future in this world, and there is no time for several years.
Chapter completed!