These days, Jiang Wei has been refining sulfuric acid, and refining sulfuric acid has been available in this era.

Jiang Wei uses green alum as raw material and calcines it in a distillation kettle to obtain sulfuric acid. During the calcination process, the alum decomposes and releases sulfur dioxide and sulfur trioxide, of which sulfur trioxide and water vapor condense at the same time to obtain sulfuric acid

The chemical formula is (FeSO4·7H2O) Fe2O3+SO2+SO3+14H2O.

Later, I felt that it was too hard to refine alone, and the speed was too slow. And when the hatching chicks began to be sold, he decided to buy them from a Taoist priest.

In the afternoon of the same day, the servants who had been buying goods for Jiang Wei bought a large amount of sulfuric acid for him, almost a hundred catties. Jiang Wei was very satisfied with this and rewarded the other party with 30 yuan.

The servant took the reward and prepared to leave with joy. Jiang Wei stopped him.

"By the way, what's your name?"

The middle-aged servant nodded,

"Childe, a certain name is Chen Niu."

Jiang Wei: ......

The name, okay, Jiang Wei just smiled faintly and said that he could leave.

With enough sulfuric acid, is it possible to start making nitric acid?

Then a handmaid walked in,

"Childe, there are a few Hu people outside, saying that they want to see Childe."

"Hu people? Did you tell who it was? ”

Jiang Wei frowned, not understanding why Hu Ren came to him, he barely had much contact with the outside world.

The handmaid nodded,

"Say what the sand of Persia is, what princess."

The maidservant did not express much panic about the princess of the Hu people. If the princess of the Tang Dynasty is here, I'm afraid this maid is already very panicked, right?

After all, in Datang, Datang people's sense of superiority and pride in themselves is bursting. Foreigners, that is, the Hu people, naturally look down on them, which is also the great martial arts of His Majesty Li Er, and the self-confidence of the people of the Tang Dynasty. Moreover, the princess of the Hu people is too far away from their world, and it will not affect them.

Jiang Wei nodded.

Speaking of Persia, he knows a rough idea.

"Bring her in."

At this time, Ruoniang didn't know where to play, Jiang Wei also seemed a little bored, and there was nothing to see the princess of Persia. It is rumored that the three princesses of Persia are beautiful and beautiful.

It's just that he wonders, what is the princess of Persia doing with him as a commoner? Could it be because of the identity of the disciple of the Immortal Family? Didn't Persia have its own sect? With curiosity, Princess Shahr walked into the courtyard with a middle-aged Persian man.

Jiang Wei sat on the Hu chair, shook the fan, and the maid stepped back and left with interest.

"I don't know why Her Royal Highness the Princess of Persia came to me?"

Shahr is very young, with a traditional white face, but his delicate facial features reflect a delicate temperament. Well, it's a strange feeling. It's like a white version of Lin Daiyu. The figure is also very petite, and there is no difference between the figure and the Asian.

"Honorable messenger of the gods of the East. On behalf of Persia, I pay you the highest respect, and we are here to ask for your help. ”

Jiang Wei glanced at the Persian princess differently, but he didn't expect her to be so fluent in Chinese.

He had some knowledge of this period of Persian history.

Because it's so miserable.

In Jiang Wei's impression, he felt that there was no worse history than this history of Persia.

How miserable is it?

After the Persians were wiped out by the Great Cannibals, the Persian emperor Yezdeged III abandoned the city and fled, trying to go to the Iranian plateau to call on the local tribe King Qin. Under the pursuit of strong enemies, in order not to slow down the retreat of the large army, the mother of Yezdegerd III, the empress dowager of the Persian Empire, led a small number of Praetorian Guards to stay, ready to fight to the death with the invaders, but everything was useless, the city was breached, the Persian Empress Dowager died heroically, and the Great Cannibals carried out a brutal massacre and plunder of the Persian capital.

The treasury of the Persian Empire was piled up, and every Arab warrior grabbed a lot of money. In addition to gold, silver and jewelry, the Arabs were also keen to loot another secret treasure of the Persian Empire - beautiful women. For the Persians, this Arab conquest is tantamount to the Persian version of "Jingkang's shame". In Ctesiphon alone, 40,000 noble women were captured by the Arabs, including Yezdeged III's and three princesses, each of whom had a national color.

40,000 noble beauties were loaded into carts by savage and civilized cannibals, or tied up in strings of ropes, and then taken to the slave markets of Damascus and Mecca after long journeys to be sold. At that time, Jiang Wei remembered that the price of a noble woman was quite cheap, and even a donkey could be exchanged for a Persian noble woman.

Speaking of which, it may seem like that, but for the next 800 years. How terrible it would be for a higher civilization to be ruled by a barbaric civilization.

After the fall of the Sassanid Persian Empire, the Persians have been in exile for 800 years, and their own religion has been replaced by the religion of the Great Cannibals, and their own history books have long been destroyed by the Arab army.

The Persians felt more and more vague about the glory of the past, and they were full of affection for the regime that had invaded them. This trend became even more pronounced after Khomeini's Islam revolution.

As for the history of Persian women being occupied by the great cannibals and Persian men not being able to get wives, modern Persians are very proud, believing that they have a sacred bloodline and regard the invaders as their ancestors. Among them, the tragic story of Princess Shahr Banu was also talked about by later generations of Persians, who believed that it was because of her that the Persians would choose Shia ideology as their state religion.

The Persians took the Great Cannibals as their ancestors, and the glorious history of the Achaemenid Dynasty and the Sassanid Dynasty was said by Khomeini and others to be a history deliberately fabricated by Westerners in an attempt to confuse the beliefs of the Persians. The great kings of Cyrus, Darius, and others were lying quietly in their tombs, and their splendor was denied by their own descendants! If you want to destroy your country, you must first lose its history. These monarchs who once shocked the world, looking at the appearance of their descendants, I am afraid they will cry sadly!

When he saw such a period of history, Jiang Wei was chilled all over. A miserable word with a capital letter, how good?

And looking at the watery Persian princess looking at him, Jiang Wei could only sigh, help? I really think Lao Tzu is a god!

But everyone has compassion, Jiang Wei is not a virgin, but he is also a country that has been invaded, he can feel that pain, and that kind of national shame is still engraved in his bones.

But he's not brainless, and although he's sympathetic, he really doesn't have the ability. It's not realistic to let yourself go out of your way to help, after all, he's just a citizen with ordinary people's thinking.

As for the gunpowder formula, it might help the Persians, but what would happen? The West received gunpowder hundreds of years in advance, and he did not dare to bear this consequence, and he did not want to be a national sinner.

"Messenger of the great Eastern God, please help us Persia, I, Shahr Banu, am willing to serve you forever and never betray."