The observation and description of geological phenomena and the understanding of rocks and minerals can be traced back to ancient times. Some chapters in the "Classic of Mountains and Seas" and "Guanzi" written in the Spring and Autumn Period and the Warring States Period in China are the earliest summary of rock minerals by human beings, and summarize some mineral distribution laws and prospecting signs from the discovered mineral fields.

With the prosperity and development of the iron smelting industry, more and more iron ore fields have been discovered and mined from generation to generation.

During the Spring and Autumn Period and the Warring States Period (770 B.C. ~ 221 B.C.), according to the "Classic of Mountains and Seas, Wuzang Mountain Classic", there were 37 iron-producing mountains. Emperor Wu of the Han Dynasty (119 BC) set up iron officials in 49 iron-producing regions. In the Tang Dynasty, according to the records of the New Tang Dynasty Book and Geographical Chronicles, there were 104 iron-producing mountains in the country at that time.

"Your Majesty, I came to you, not because I wanted you to find General Li Ji for iron ore for me, but because I plan to go to Jinzhou to open a mine by myself." After listening to Li Shimin's words, Wang Dazhui knew that Li Shimin had misunderstood, so he quickly explained.

"You want to go to Jinju to open a mine yourself?" Li Shimin listened to Wang Dazhu's words, and put down the wine bowl that he had just picked up in his hand. With doubts on his face.

"Yes, Your Majesty, I inquired carefully, our Datang is now rich in iron ore in Jinzhou, shallow burial, large reserves, and easy to mine." Wang Dazhui came to Li Shimin and said with a smile.

"You know how to mine iron ore? Besides, the existing iron ore mines are all famous, you don't want to find a new one yourself, right? Li Shimin asked curiously.

"Your Majesty, you are wise, I haven't said it yet, you can guess it, I really plan to explore and develop new iron ore by myself. Didn't I come here to ask you to get me an approval for mining iron ore? In order to get the mining rights of iron ore, Wang Da Hammer began to flatter.

"Hehe, I know you have a lot of ghost ideas, but I didn't expect you to be interested in mining iron ore? You must know that those iron mines are all in the mountains, and they are not a fun place. Besides, if you want to find an iron ore that has not been discovered, it depends on luck, not if you want to find it. Li Shimin looked at Wang Dazhui and felt that Wang Dazhui was still thinking too simply.

"Your Majesty, you don't have to worry about me, as long as you give me the approval, you don't have to worry about other things, just wait for the good news of my triumphant return." Wang Dazhui gave Li Shimin a hammer on the shoulder, and swore at the same time.

"Okay, I want to see what tricks you can toss, isn't it just a piece of paper, I gave it to you, and it should be regarded as compensation for your previous losses." Li Shimin thought about it for a while, and knew that Wang Dazhui was the kind of person who would not give up until he reached his goal, and if he didn't agree to him, it was estimated that he would not be able to drink this wine today.

"Thank you, Your Majesty!" Wang Dazhui listened to Li Shimin's back and rubbed his shoulders even harder.

"Sledgehammer, although you are smart, but after all, you are still young, and the matter of studying must not be wasted, as for other things, just let your subordinates run errands." Li Shimin is a person who values love and righteousness, and saw that Wang Dazhui was well-behaved and sensible, so he reminded him seriously.

"Thank you Your Majesty for reminding me, I will definitely obey your will, study hard, and become a great official in the future." Wang Dazhui said to Li Shimin with a grin.

To tell the truth, Wang Dazhui and Li Shimin are very close now, even closer than the crown prince Li Chengqian in front of Li Shimin.

On the one hand, Wang Dazhui is smart and sensible, and on the other hand, Wang Dazhui is not as restrained as Li Chengqian in front of Li Shimin.

The two of them talk together very easily and naturally, not informal, Li Shimin is deceitful and troublesome in the court on weekdays, and it is rare to relax with Wang Dazhui, so he will naturally be in a particularly happy mood.

"I heard that you invented something called cement in Longyou Road? Paving roads, building bridges, and building buildings are particularly easy to use? Li Shimin asked.

"That's nature, this cement is a good thing, using it to build a city wall, not only saves manpower and material resources, but also is particularly strong and firm, water and fire do not invade, and ordinary impact will not cause any damage at all." When it comes to cement, Wang Dazhui is very proud and can't help but talk eloquently.

"Sledgehammer, you are really our noble man of the Tang Dynasty, you invented gunpowder at a young age, and now you didn't expect to invent cement, I really don't know what strange things are in your brain." Li Shimin drank wine and enjoyed Wang Dazhui's massage, very happy.

"Your Majesty, these are nothing, and with good steel, I can make something even more eye-opening." In Wang's view, these things are just casual ones.

"Did you learn all these things in your dreams? What are the things you said in your dreams in the future? Li Shimin remembered the first time he saw Wang Dazhu.

"Your Majesty, only the unthinkable, nothing can't be done, as long as the generation after generation continues to work hard, of course these things will become a reality." As Wang Dazhui spoke, he couldn't help but think of the scene in the future.

"You are a child, sometimes your mind is more mature than us adults, this is not good, children should be like children, and play when it is time to play." Li Shimin looked at Wang Dazhu, and the expression on his face was very kind, as if he was looking at his own child.

Listening to Li Shimin's words, Wang Dazhui's heart was particularly moved, at this moment Li Shimin was no longer a high-ranking emperor in his eyes, but like a kind elder.

After chatting with Li Shimin for a long time, and having the imperial meal together, Wang Dazhui said goodbye satisfied.

……

"Brother Sledgehammer, can you play with Min'er for a while?" As soon as Wang Dazhui entered the door, his cousin Min'er greeted him.

"Min'er, why do you say you're so ignorant? Your Sledgehammer cousin just came back from a busy day outside, and you're tired from a day, and you won't let him take a break? Aunt Wang Xuemei saw that as soon as Wang Dazhui came home, her daughter pestered Wang Dazhui to play with him, and hurriedly reprimanded.

"No, Brother Sledgehammer hasn't played with me for a long time." Listening to her mother's words, Min'er muttered dissatisfiedly.

"Auntie, you don't have to blame Sister Min'er, I'm not tired at all, and besides, I, as a cousin, should play with my cousin." Wang Dazhui looked at Min'er, who was pouting and holding his arm, and said to his aunt with a smile.

Aunt Wang Xuemei, after hearing Wang Dazhui's words, shook her head helplessly, "You, just get used to her like this!" However, he no longer cares about the two siblings playing.

"Brother Sledgehammer, why do you see your face is so dark?" Wang Dazhui has been running outside lately, and he has been in the mountains for a while, so his skin is naturally a little dark.

Wang Dazhui smiled and said, "It's okay, it's all sunburned, cousin, I'm not your girl, it's okay to be dark." As long as our Min'er sister is white and tender. ”

(End of chapter)