Tibet

On the way back, Li Ye sat in the carriage and pondered silently. He knew that the iron fire thunder would succeed sooner or later, and the Song Dynasty succeeded, but the power of the iron fire thunder was still not enough.

If explosives are available, they can be used in large quantities on battlefields and for civilian use.

Explosives, also known as nitroglycerin, is not difficult to make. Nitroglycerin can be synthesized by combining nitric acid and glycerin and using concentrated sulfuric acid as a catalyst.

When he was in middle school, he read the book "The Mysterious Island" more than once. The engineers in it created nitroglycerine with nothing.

The key here is sulfuric acid, but his middle school chemistry teacher said that the alchemists of the Tang Dynasty had already created sulfuric acid. Why could European chemists create sulfuric acid and nitric acid out of thin air? In fact, I learned it from Chinese classical literature.

China is far more than the four great inventions. Missionaries who came to China discussed the inventions and creations of ancient China and listed papermaking, printing, gunpowder and the compass as China's "four great inventions".

On the surface, this formulation boosts the confidence of the Chinese people, but in fact it obscures China's other inventions and creations, which are as bright as the stars and countless.

The Industrial Revolution in Europe was actually based on thousands of years of accumulation of ancient Chinese civilization.

The so-called Renaissance was nothing more than the fall of Eastern Rome. Missionaries transported a large amount of Eastern literature to Europe. The first stop was Greece. This is why Western civilization was born in Greece.

In the Tang Dynasty, sulfuric acid was called green vitriol, and thieves in the Tang Dynasty also knew how to use it to corrode walls and steal property, which shows that sulfuric acid has become relatively popular.

What is green vitriol? It is ferrous sulfate crystal. It was used as medicine in the Tang Dynasty.

During the Northern Song Dynasty, the alum-making industry was extremely developed. The most famous nightclub in Bianliang was called Alum Tower, also known as Fengle Tower.

Li Ye would like to find an opportunity to ask Li Tengkong, how to make green vitriol oil?

Li Tengkong is a famous alchemist, but she is an alchemist who studies medicine.

Back at Qi Palace, it was already dark.

As soon as he returned to his home, his wife Dugu Xinyue came up to him and said, "Li Dutong has been waiting for your husband for a long time!"

Li Ye suddenly felt dizzy. He knew that Li Chenghua was going to be verbose again.

When they arrived at the guest room, before Li Chenghua could speak, Li Ye smiled and said, "Let's not talk about business for now. Come have dinner with us!"

Li Chenghua stared at Li Ye for a long time and said, "Your Highness promised me that he would not run around in these two days!"

"Today is a special situation. I promise to be honest tomorrow and not run around anywhere. Come! Let's have dinner together."

Dugu Xinyue stepped forward and took Li Chenghua's hand and smiled: "Don't be angry now, let's talk about it after dinner!"

It was all because of women that Li Chenghua was very close to Li Ye's wives. When Li Ye was not at home, Princess Dugu Xinyue often asked her to bring her daughter to have dinner with her family.

Li Chenghua is still single, but her daughter is thirteen years old, and she herself is in her mid-thirties. She has never been able to find the right person, and she no longer considers remarrying in the past two years.

She is the commander-in-chief of the Internal Guard. Next, Li Ye plans to make her the chief of the Department of Punishment. In the Tang Dynasty, a woman could be the emperor, let alone the chief of a department.

Once the official reached this point, she no longer considered getting married.

After dinner and tea, Li Chenghua said to Li Ye: "Today, three cases of money theft occurred in Chang'an. There was no robbery case, but they had nothing to do with Han Zaiyu. This shows that Han Zaiyu does not intend to lurk in Chang'an for a long time. I guess he will probably take action today and tomorrow."

Li Ye smiled slightly and said: "He can also steal money and goods in Xianyang and Xinfeng!"

"Your Highness, the fact that he stole weapons in Dongshi shows that he has not considered the counties around Chang'an at all."

Li Ye nodded and said, "How do you arrange it?"

"In order not to alert others, I have not deployed internal guards around Qi Palace, but I have been prepared. If there is an emergency, three thousand internal guards will be dispatched immediately to surround the outside of Qi Palace. In addition, Aunt Gongsun is already stationed at Jinhualuo. Please ask Your Highness and your family to stay in the Zhen'an Building tonight."

Zhen'an Tower is a four-story tower located in Chenxiang Pavilion. It is made of wood on the outside and huge stones on the inside. It has no windows and only one door for entry and exit. It is actually the place where the emperor hides from assassins.

Dugu Xinyue on the side said: "Li Dutong also asked us to go to Zhen'an Tower just now. I said I want my husband to come back and make a decision!"

Li Ye thought for a moment and said, "You can go, but you must trust Li Dutong's experience and judgment."

"Then I'll make arrangements!"

Li Ye nodded, and Dugu Xinyue immediately got up and hurried away.

Li Chenghua glared at Li Ye and said, "The key is that His Highness is going. If Your Highness is not going, what's the point?"

Li Ye smiled slightly and said, "Li Dutong wants to use the empty city strategy?"

"That's right. As long as His Highness and his family are safe, we might as well dig a trap in the palace to let him in."

Han Zaiyu had already appeared under the East City. The moat was frozen solid. He walked across the ice and stood close to the city wall.

He looked at the top of the city, flicked his hand, and threw a fine steel flying claw onto the top of the city. He pulled hard and the flying claw hooked the top of the city. Han Zaiyu jumped lightly and climbed up.

It was already the first watch, the surroundings were very quiet, and the city wall was also very quiet. There were only a few fires lit at the top of the city, and the guards gathered around the fires to keep warm.

The winter night was very cold. If you were still patrolling the city at this time, you would be half frozen to death. However, the guards could not leave their posts without permission, so lighting a fire to keep warm was the only way.

Warm up the fire for a while, go on patrol, then come back and continue to light the fire, and switch to another group of people to patrol. Everyone takes turns to light the fire and patrol, so that they can keep warm and fulfill their duties.

But this also has a drawback, that is, if there are half fewer people on duty, there will inevitably be defensive loopholes.

When a group of more than 20 female soldiers walked past, Han Zaiyu jumped up to the top of the city, ran along the overpass to the inner city wall, then turned over and entered the city, grabbed the city head with one hand, and pressed his body against the city wall.

The rabbit rises and the falcon falls, moving very quickly. Han Zaiyu slowly slid down the city wall. He had already entered the Qi Palace. He ran for more than ten steps, climbed a big tree, and looked around the palace. There was deathly silence and darkness all around, except for the northeast. The horn lights are bright, shining like daylight.

He remembered that this place was called Jinhualuo. Judging from the layout and structure, it looked like a mansion. He immediately concluded that the palace inside the palace must be the residence of King Qi.

He slowly climbed down the tree and ran towards Jinhualuo.

Zhen'an Building is located in the middle of Chenxiang Pavilion. It has four floors. Although it is airtight and has no windows, it is well ventilated inside.

The iron gate on the first floor is the only place for entry and exit. There are twelve female guards guarding the first floor.

The second floor is the living area, where meals and gatherings are usually held, just like the living room and dining hall. The third floor is everyone's bedroom. There are seven bedrooms in a circle. Although it is a place to avoid assassination, it is very comfortably furnished for the whole family. It's totally possible to live here.

By this time, the whole family had fallen asleep in their respective rooms, and the lights were dimmed, except for a few wall lamps.

The fourth floor is the study room. The light in the study room is bright. Li Ye is still pacing back and forth in the study room, thinking about the overall situation of his future. He doesn't care about trivial things like assassins at all, and he has no interest in participating in catching assassins.