In front of me was a stone mountain, with bare rock walls and no trace of weeds. This mountain is not only high, but also large. What's more, it has almost no slope and is completely straight up and down.

Feng Yuheng looked up and saw that his chin was stretched so hard that he could see a little bit of the mountain tip at the end of the clouds. He couldn't help but sigh: "Standing from the sky, is this kind of mountain you are talking about?"

Xuan Tianming explained to her: "This mountain is called Xutian. It is the highest mountain in the Pingxu Mountains and the most dangerous one. This mountain stands vertically, with peaks entering the sky, and rocks on all sides, and there is no possibility of climbing."

She asked curiously: "What about you? Can you turn it over with your light skills?"

Xuan Tianming shook his head, "We are not gods. Even if we use our light skills to climb over the mountain, we need to step on many steps in the middle. What's more, although the barrier mountain we climbed is high, it is still less than 30% of that of Xutian Mountain. The mountain that enters the clouds is even a master of light skills, and even if we are exhausted, we can't get over it."

"So that's how it is." Feng Yuheng still looked up, thinking, "You said, the camp is not far from the capital. Such a high mountain can be seen in the capital. Why have I never paid attention to it?"

Xuan Tianming pointed ahead and told her: "The capital city is in the back of the mountain. There is a big river there. The air is wet all year round. The water mist rises and connects directly to the clouds, just covering the mountain."

Feng Yuheng heard it and felt magical. Now he was alone at the foot of the mountain, he was extremely shocked. However, something even more shocking was still behind. When Qianli pointed at the big stone mountain in front of her, he told her: "County Lord, Xutian Cave is inside this mountain."

"Huh?" Feng Yuheng was stunned. Inside the mountain? Could it be... "This mountain is actually empty?"

Xuan Tianming couldn't help laughing when he saw her stupidity and said softly: "If you are really curious, you can uproot this mountain, stuff it into your sleeves, and take it back and study it slowly."

She shook her head repeatedly: "No, no, my sleeves are not that big, this is a mountain!"

As she spoke, Qianli had already walked a few more steps forward. There were heavy troops guarding her in front. She looked carefully and found that the mountain opposite seemed to be a little different, but she couldn't tell what it was. She could only push Xuan Tianming and follow Qianli forward.

Finally, the mountain was within reach. When the soldiers guarding the mountain saw that they were coming, they knelt down and saluted. Xuan Tianming called them up and gave a faint command: "Open the mountain." Then dozens of soldiers rushed forward collectively and pushed them up the mountain together.

Feng Yuheng stroked his forehead. He heard of Yugong moving mountains in the fable. Now she saw a realistic version of the soldiers pushing mountains. She was a little excited to think about it!

At this time, with a "boom", the soldiers pushed a gap open on the mountain, and then the soldiers continued to move, and the gap became larger and larger, and finally formed a huge stone door.

The door opened against the mountain is so huge that it will shock people when you see it with your own eyes. In such an era without any mechanical production tools, it is really not easy to open such a mountain gate.

But it was not easy to be behind. As soon as the mountain gate opened, the soldiers immediately returned to their posts. Qianli made an inviting action to everyone, then strode forward and took the lead in entering the mountain gate.

Xuan Tianming pinched Feng Yuheng's little hand and said, "Let's go in, let's take a look at this legendary Xutian Cave."

With twelve-point curiosity, she pushed the wheelchair and walked into the mountain gate with Qianli.

The cool wind came straight, making her shiver on the ground. Suddenly, she remembered the natural caves in the southern part of her previous life, which also hollowed out the mountains. She also visited with a tour group. It was summer inside, as cold as winter, but as beautiful as a fairyland.

Looking at this place, the Xutian Mountain, which was towering into the sky, hollowed out the seven-story building as high as the 21st century, and then various strange buildings were built in this hollow mountain. She noticed that there were also sloping stairs around the mountain wall, and there were patrolling soldiers walking around on it, and there were guardhouses. Five steps were a very high. The soldiers standing on it should be able to see the full picture of the Xutian Cave.

This is just a part that you can see at a glance. There are many passages around you, and I don’t know where it leads to.

Someone inside came forward to greet him, and after saluting, he said, "The sixteen blacksmiths and the apprentices they brought were waiting in the furnace. Should the general go there to see him, or ask them to come?"

Xuan Tianming said: "Let's go to the furnace ground."

The man nodded and took the initiative to walk forward and lead the way.

Before Feng Yuheng came back from the shock, Xuan Tianming had already begun to tell her the origin of Xutian Cave - "This was built by the founding emperor of Dashun. It was poured into 30% of Dashun's labor to dig the mountain to such an extent. Later generations of monarchs were all committed to the construction of Xutian Cave, which was more attentive than the construction of his own tombs. Until my great-grandfather's generation, this Xutian Cave was truly completed and put into use."

Feng Yuheng could imagine the tenacious perseverance of the ancients when they poured into a great building from generation to generation, but she couldn't understand why it was to empty such a mountain?

Xuan Tianming knew that she understood and thought in her heart, so he took the initiative to say, "In fact, when Dashun was established, this place was built to avoid disasters. At that time, Dashun's territory was not so vast. After Changchang's battle, the whole country was in ruins. In addition, the surrounding four countries were eyeing him, and if he was not much, he would encounter a disaster of destruction. Therefore, the king had to pick a place that was easy to defend and difficult to attack in the suburbs of Kyoto as a place to protect his life at a critical moment. The digging of Xutian Cave was proposed at that time. The previous monarchs of Dashun did not live long. After three generations, the national danger was not completely lifted, so the Xutian Cave was dug. Until the fourth monarch succeeded to the throne, the country was firmly settled, but building this place became a habit and a belief."

Feng Yuheng understood, "Xutian Cave has become a symbol. As long as it is good here, the king will be at ease, which also means Dashun and the peace of mind. Now, Dashun is the most powerful country in Middle Earth, with heavy troops guarding the borders of all directions. Even if there is a war, it must be a real sword and gun to fight to the battlefield. Naturally, the king will no longer think about hiding in Xutian Cave. So this place will be cheaper, right?"

Xuan Tianming corrected her: "It's because we're cheap. I chose the steelmaking land here, I'm afraid that in the future, this place will become the place where you spend the most time every day."

Feng Yuheng smiled, "No, I like this place."

While speaking, everyone had walked to the so-called melting pot land of the soldiers. That place was an independent space, connected to the main cave outside by a small path. The small path came in, and this small cave was this small cave.

It is said to be a small cave, which is comparable to the big cave outside. In fact, this cave is not small at all. According to Feng Yuheng's calculations, it must be at least 200 square meters here. Countless wall holes have been dug around the mountain, and someone has already built an iron-smelting furnace there.

Qianli clapped his hands at the people in the furnace ground and shouted: "Everyone is here to see our general and the Lord of Ji'an!"

Everyone knows that the general of the Northwest Army is the ninth prince who is most beloved by the emperor today. Everyone knows that the lord of Ji'an County is the future concubine of the ninth prince. He is also the miracle doctor who is said to be even more powerful than her grandfather Yao Xian. Everyone knows that the only person in Dashun who can make steel is this Ji'an County Lord.

So when he heard that they were coming, sixteen blacksmiths and their apprentices rushed up together, knelt down and bowed, muttering: "Your Highness, County Lord, Thousand Years!"

Feng Yuheng once heard someone shouting Qiansui and brought her with her, and she was a little uncomfortable for a moment. Xuan Tianming was naturally used to this scene. He raised his hand and said, "Get up!"

People stood up tremblingly. Feng Yuheng looked at these blacksmiths. Most of them were older, and the youngest looked to be up forty-five years. So the apprentices they brought were very young, most of them were just teenagers.

Looking around, there were many tools on the edge of the furnace, including a large bellows, charcoal and iron charcoal. After all, they were blacksmiths, and all preparations were made by irons, but the tools were very complete and professional.

She spoke up and asked those people: "Do you know what you are doing when you find this place?"

The blacksmiths nodded and replied, "I know, it's a kind of thing called steel."

The braver asked, "I heard that something called steel is very hard and can break iron like mud. Is that true?"

He asked, and everyone opened their expectant eyes and waited for Feng Yuheng's answer.

But she deliberately did not answer immediately, but took this opportunity to observe the eyes of these people. After seeing all sixteen, she couldn't help but nodded with satisfaction. She was indeed the best blacksmith. Although she did not see their skills, this simple fanaticism that she showed in the face of new and good things was impossible to pretend. Only those who had absolute enthusiasm for their profession would show such an attitude when they heard that they could further improve their realm. These blacksmiths were all such people.

She felt a little relieved. She was afraid of making steel, only craftsmanship and no fanaticism. No one had ever come into contact with real steel in this era. The first time she made it, it was very likely that ten, twenty, or even hundreds of furnaces would fail. Or she did not have a firm belief and persistence, and could not stand this temperament or such torture. She also wanted such a person. Even if her skills were poor, she could teach her little by little. As long as her enthusiasm was still there, everything was possible.

She told everyone: "It is too exaggerated to say that iron is broken like mud, but there is indeed a big difference between steel and iron. Steel is a metal that is harder than iron. Theoretically, steel is an alloy, while iron is a separate texture. The main difference between them is the amount of carbon. To put it bluntly, steel is an alloy with a carbon content greater than or less than a fixed value and based on iron. Maybe everyone is not clear about it when I say this-" She handed her steel knife to Bai Ze, "Bai Ze, go and try it for everyone to understand where the difference between steel and iron is."
Chapter completed!