The scale of the Shen family is much larger than that of the Cheng family, but in terms of its influence and control power in the capital, it is less than one-third of the Cheng family's Yu Shaonan. The carriage with the Shen banner could not even guarantee the privilege of ordinary nobles - when passing through the second gate, there were city guards who collected money.

Cheng Jinzhou, who was still familiar with aristocratic life, couldn't help but widen his eyes. This kind of thing is not to mention the Great Xia Dynasty, which emphasizes the difference in identity, in a more mature era, the gentleman with a special license plate was stopped on the spot at the high highway toll station, no matter how it is normal, what he didn't expect was that Lin Bo paid the money in a proper manner, and Shen Cong was silent.

"The Emperor's Rules." Shen Cong explained weakly, feeling that he had lost face in front of the rural nobles.

"I thought the nobility didn't have to pay taxes." Cheng Jinzhou didn't hurt him lightly, and stimulated the son of the Shen family with his nostrils facing the sky.

In fact, not only did the nobles not have to pay taxes, the officials did not have to pay taxes, the meritorious gentlemen did not have to pay taxes, and the astral warlocks recognized by the Astral Warlock Association did not have to pay taxes, and so on, so that a huge tax-free class was formed within the Great Xia Dynasty, which had been founded for hundreds of years. On the plus side, it was also this tax-exempt class that supported the normal functioning of the state - without any benefit, who would support His Majesty the Emperor to live a happy and leisurely life.

Shen Cong blushed slightly because of anger and said: "Our Emperor Xià wants to go crazy thinking about money, the capital is fine, it's just a card to collect money, Hexi is bad, I heard that the transfer envoy wants to try the new tax law......"

"You know all this?"

"There are no diaper toilets." Shen Cong finally got rid of the topic of suitable talents.

Cheng Jinzhou had a close relationship with Liu Bin, and he had no other way to learn about the news of the imperial court, so he took the opportunity to ask carefully.

When a 17-year-old boy needs to be recognized by others and is eager to express, Cheng Jinzhou only makes a moderate expression of admiration, which can make Shen Cong talk endlessly. The latter had nothing to worry about in the face of a 13-year-old child, and his face flushed with excitement while dancing. Because the little unhappiness brought by the city guards has long been thrown out of the clouds.

For a while, Shen Cong even felt that his new classmates were knowledgeable and interesting, and it was also very good to cultivate them as a junior brother.

……

Entering the warehouse area of the wharf, the bumps of the carriage became violent, and the concession of people and cars came and went sharply, and the strong men who worked saw the noble banner, except for giving way, but very few deliberately avoided the road, perhaps because the number of nobles in the capital was too much, so that they could not avoid it while being familiar.

Because it is built in the place of the 6th thoroughfare of the water, although the population of Xiajing is not one million, the regional materials are more abundant, and the west wharf built according to the Jingzhou Canal stretches for more than ten miles, and it is not an exaggeration to say that there are thousands of ships and thousands of sails in the case of the largest navigable ship is only three or four hundred tons.

Shen Cong was disgusted with the fishy, sweat and ** smell wafting on the dock, pinched his nose and scolded something, jumped out of the car stiffly, and said viciously: "You'd better let me see the interesting, this place ......"

On the potholed ground, it is natural for the boots to splash some muddy water, but it is a bit costly to stain a pair of Nanhu silk uppers and small sheepskin turns. Shen Cong frowned as if he had been molested: "Shaw's boots are not easy to buy." ”

"It's still a limited edition." Cheng Jinzhou lowered his head two heads than him, but said with his chest held high: "Lin Bo, please lead the way in front of the trouble, did you get the sulfuric acid?" ”

"There are 4 jars of things you call 'sour' in the shop, and it is not clear if they flow or not. It's been delivered. Lin Bo laughed, the prime minister's seven rank officials in front of the door, for a 13-year-old child, he was much more natural.

"That'll do." There are almost some things that can be fooled, and Cheng Jinzhou is satisfied.

The location of the Shen family's warehouse is very good, about three or four hundred meters after getting off the carriage, due to the deliberate vacancy, only one-third of it is filled with pottery, lacquerware and other goods, the empty space is the size of two basketball courts, 3oo surplus stones of grain are piled alone in the corner of the door, it looks as if it has been abandoned.

Cheng Jinzhou picked up the wheat with his hand and looked at it for a while, then said with satisfaction: "It's good, I'm sorry for you." ”

The so-called practice makes perfect, and he can also see the quality of some food.

Lin Bo didn't know if he could understand it as a child, so he smiled: "It's good if the son likes it." ”

For a family like the Shen family, court restrictions such as grain reporting have no effect, and when the magistrate wants to claim to be humble, there is no need to expect officials to question the court officials for this. In the end, it is still a situation in which the people do not hold officials accountable. Moreover, the transaction volume in the capital is huge, and it is difficult to clarify the accounts like Shaonan, so the Shen family is naturally not as cautious as the Cheng family.

Cheng Jinzhou rubbed his face slightly, turned around and smiled: "Do you want to leave me alone inside?" ”

"After walking with you for half an hour, all the clothes and shoes are scrapped, you dare to block me outside?" Shen Cong didn't know where to get a silk scarf, covering his face like Zorro in a third-level film, and said hatefully: "In the Hongwen Pavilion, we are also the number one person." ”

"What about sulfuric acid?" Cheng Jinzhou smiled casually, the latter looked at him like a 13-year-old child, and he looked at a 17-year-old child.

"In that corner, I'm worried about dyeing the grain." Lin Bo said cautiously.

Cheng Jinzhou looked at it, and there were really 4 small jars piled up in the opposite corner, the size of a 1o catty soju jar. Walking in a little, you can smell the familiar pungent smell of sulfuric acid, and Xiao Cheng covered his nose and laughed.

It is much more wonderful to encounter sulfuric acid through the crowd than to meet the old people in other places.

On the open interface, the customer service o1o had been waiting impatiently for a long time, and urged: "If you buy a book, there is a copy of 70,000 words, are you sure?" ”

Cheng Jinzhou turned his back to the son of the Shen family, pretending to look at sulfuric acid, and turned his mouth up and down: "Change a book, you need more words." ”

In his understanding, the few words in the library are mostly papers, magazines and pamphlets, and the slightly better ones are the "cultural relics and monuments" left over from the previous generation. For him, relative to the timeliness and professionalism of the paper, those books that have been summarized and matured may be more useful, although from another point of view, the content of the book is bound to be uneven, and the probability of getting good things does not necessarily increase, but Cheng Jinzhou still wants to try it, previous experience has proved that it is difficult to encounter satisfactory content when only buying short books, and it is not easy to encounter, and it will be like "Mechanical Metrology", only the previous part, which is very unpleasant to read.

Customer service o1o didn't need to study Cheng Jinzhou's psychology, and said bluntly: "If you want to determine the number of words, then you have to relax the requirements in other aspects." ”

"I've heard a lot of quantum laws and stuff like that." Cheng Jinzhou pouted and said, "Then you don't need to determine the number of words, I'll decide by myself." ”

Last time, he played a similar game with his customer service comrades, and although both of them were so tired that they were foaming at the mouth, he obviously won. As a customer service, Comrade O1O definitely can't compare with Cheng Jinzhou to practice endurance in his spare time, seeing his tough attitude, he can only reluctantly compromise: "120,000 words, are you sure?" ”

"When I say yes, we'll trade again." After Cheng Jinzhou finished speaking, he wrapped a rag and took out a jar of sulfuric acid, covering his nose with one hand and untying it with the other.

The first thing that mixed into the air was the smell of sulfur, and in terms of the feeling of the nasal mucosa, there was little change in the whole.

"Distilled and calcined." Cheng Jinzhou sighed, although he is a doctor of theoretical physics with cheating as his main tool, simple chemistry is still difficult.

The so-called distillation calcination is to distill ferrous sulfate, what the Chinese call alum oil, in a sealed environment, the main purpose is to decompose ferrous sulfate at high temperature, and let it decompose sulfur dioxide and sulfur trioxide, the latter fused with water, that is, sulfuric acid. The more advanced practice is to find a way to convert sulfur dioxide into sulfur trioxide to increase its concentration, and in the environment of the Great Xia Dynasty, when you smell the strong smell of sulfur dioxide, you basically know how to make it.

"These four cans cost a lot of money." Cheng Jinzhou specially asked, distillation and calcination consume manpower and firewood, and the price cannot be as refreshing as in the industrial age.

"A jar of 3 taels of silver." Limber replied.

The price of 1o catties is the yield of two acres of land, but it is much cheaper than Cheng Jinzhou imagined.

Before he could speak, Shen Cong couldn't wait and said, "Don't worry about a little money?" ”

Despite covering his nose, Shen still looked at the viscous liquid in the jar with curious eyes, and wanted to touch it with his hands.

"It'll be cooked." Cheng Jinzhou hurriedly grabbed him and said, "This thing can corrode all the iron." ”

After saying that, he commanded: "Go and get a larger basin, preferably ceramic, and bring clean water."

"Ceramics don't rot? No harm to food? Shen Cong looked at it curiously, and deliberately showed a nostril.

Cheng Jinzhou ignored him. After a while, the people brought two large stone troughs, one for storing water on the boat, and the other for drinking water for cattle and horses, both of which were more than two meters long, and four or five bags of water were packed with leather bags. ”

"Enough, enough." Cheng Jinzhou said, called another subordinate, carefully lifted the sulfuric acid, and slowly poured it into the stone trough.

An unpleasant white gas rose rapidly, mixed with the stench accumulated in the stone trough for many years, like a praying mantis soaring.

Cheng Jinzhou casually grabbed two handfuls of wheat and threw them into the sulfuric acid, and said, "Look at how powerful it is." ”

The wheat fell into the trough and became charred and blackened. The only thing that can compete with the dehydration of concentrated sulfuric acid is government taxes.

"What are you going to do? I see that other astral warlocks use a lot of things and cook them together. "After all, Shen Cong was born in a family, and he can be regarded as well-informed in this era.

Cheng Jinzhou smiled and didn't explain, where did he really know what star alchemy, and commanded a few times in a low voice, and the two subordinates immediately took action.

A long bamboo pipe was brought in again, and a skin bag with water was attached to it for later use, and another man shoveled the wheat in a dustpan, ready to be raised at any moment. Cheng Jinzhou stood far behind the wheat pile and beckoned the others to stay away.

Sulfuric acid itself contains a large amount of dilution heat, simply put, it will release a large amount of heat when it is diluted. And because sulfuric acid is heavier than water, if the water is poured into the sulfuric acid, it will make the water float on the sulfuric acid, only the contact surface of the two sides is heated, and it becomes local heat, which causes the liquid to tumble, a large amount of contact causes more violent churning, and even the sulfuric acid is splashed out.

Therefore, the correct approach should be to slowly add sulfuric acid to the water and stir it constantly to dissipate the heat sufficiently. Due to its inherent danger, in the chemistry class at school, the teacher will inevitably give thousands of instructions and never tire of shouting: "Pour sulfuric acid into the water against the wall and stir it with a glass rod ......"

If it weren't for the dilute of sulphuric acid that was used too much in the real yàn, it was inevitable that the talents of the Ministry of Education would have come up with 10,000 reasons to demand that secondary school chemistry classes stop this terrible and dangerous practice.

Cheng Jinzhou didn't have any consciousness of talent at all, except for shouting "everyone retreat", he kept rubbing the ring in his hand and whispered: "Mr. Ke, when I say a deal, you will accept something." ”

"Okay." Customer service O1O has no objection to this.

Shen Cong and Lin Bo's eyes widened, ready to enjoy the performance of the star warlock with water into sulfuric acid.

"Pour water." Cheng Jinzhou shouted.

A skin bag of clear water is quickly injected into the bamboo tube, flowing down the bamboo gurgling downward, followed by the second skin bag, and the third skin bag.

The concentration of sulfuric acid obtained by distillation and calcination is usually very difficult to exceed 76%, but even if the quality is worse, the heat contained in 1o catties of sulfuric acid is still quite terrifying.

The clear water of the first skin bag flowed into the sulfuric acid in a calm manner, with a sound of squeezing, accompanied by a faint white smoke, Shen Cong waited for three or five seconds, and was about to turn around and laugh, when the water surface suddenly rolled up, and in another two or three seconds, the entire stone trough was as violent as water into boiling oil, and splashed water droplets containing concentrated sulfuric acid in all directions. The man who poured water on a high place snorted and hid behind the door, while the one with the dustpan lifted the wheat out with all his might, and then hid his head behind the dustpan and ran backwards.

If it was just a skin bag of water, the performance might end there, but the water stored in the bamboo pipe was continuously injected into the sulfuric acid, and the water that had not been fully reacted before also accumulated together, and the increasing cold and heat changes made the sulfuric acid in the sink fly up like an explosion, whether it fell on the ground or hit the wall, the hot sulfuric acid would continue to dissipate heat, and the white gas with a scorching spicy smell soon filled the entire warehouse.

Cheng Jinzhou rubbed his face in a low voice and said, "Mr. Ke, it's a deal." ”

Piles of grain quickly disappeared without a trace.

"Star Alliance Reading, "Elementary Mental Arithmetic Course", translation needs to be added by 5o%." The voice of the customer service o1o is dry.

"Elementary mental arithmetic tutorial?" Cheng Jinzhou silently read the name and said decisively: "Sure."

120,000 words cost 12o star yuan, and an additional 5o percent will cost 18o star yuan, which is really not a small amount, but when Cheng Jinzhou saw the content on the ring, he no longer thought about the small question of how much money was spent.

The door of the warehouse was wide open, and the warehouse where the smoke had dispersed smelled like barbecue shit, Shen Cong coughed and ran over, and shouted with a magical face: "What was burned just now is grain?" ”

It was no surprise that the grain that was bigger than a truckload was gone, and the smoke and scorching smell of sulphur were all over the place.

Cheng Jinzhou, who was originally going to continue to lie, couldn't take care of him, rubbed his fingers, and looked at the pages. The book in front of him turned out to be a calculation technique that he had never even heard of - in the 21st century, there are countless methods of mental arithmetic, such as the famous mental arithmetic, after systematic training, it can complete the multiplication of 18 digits in one second, which is terrifying, but it is also a calculation method after all, and does not have the ability to face the analysis of problems, and the user is more inclined to deal with the numbers, and cannot take into account other things.

However, the "Elementary Mental Arithmetic Tutorial" displayed on the ring surface is obviously a computing technique used to deal with practical problems.

"Star Alliance Readers......" Cheng Jinzhou repeated the previous statement of customer service O1O.

"What did you say?" Shen Cong asked Cheng Jinzhou with an excited face.

"Do you know how many steps we'll have to take from here to the lighthouse ahead and back to the largest ship on the right?" Cheng Jinzhou looked at the example in the void and smirked.

The children of the family will learn more mathematical foundations, and Shen Cong asked inexplicably: "You can calculate things with that acid?" ”

Cheng Jinzhou stretched out a thumbs up and said to the position of the carriage in front of him: "Do you know how humans determined the latitude and longitude back then?" It is a projection of the stars and the sun. ”

With a mysterious expression, he said to himself: "If you know the angle, if you know the height, I will know everything." ”

"Who said that?"

"It's in the book." Cheng Jinzhou laughed and said: "Trigonometric functions plus rulers and gauges are plotted, there is nothing else to ask for." ”

……

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