Li Mu thought about it for a while, found a piece of paper, and used the secret skills, and immediately various branches and patterns of all primary skills emerged in his mind. However, only the words "forging and woodworking skills" are lit. It seems that this is the meaning of "the recordable secret technique level is lower than the current skill level" in the skill explanation. Li Mu only has two skills upgraded to the intermediate level, and he can record it using the secret skills, and only the primary skills and formulas of these two skills.

Li Mu took a piece of paper and chose primary smelting. The number of times the secret book was used was set to be once, and silently confirmed. A flash of light appeared on the paper. When I picked it up, I saw that it was some tips about smelting skills. Li Mu put down the paper and returned to the system. He found that in the skill branches listed in the secret, the primary smelting had turned red, and there was a cooling progress behind it, which lasted for ten days.

"There are skills that cool down?" Li Mu frowned. This is the first time he has seen a cooling skill since the system was started. But after thinking about it carefully, it doesn't seem surprising. If this secret skill has not cooled down, he will randomly produce 180 secret books. Wouldn't the Tang Dynasty have entered the industrial age?

Li Mu guessed that the cooling time of this skill should be related to the skill level and the number of times the secret skill is used. The higher the level of the secret skill, the longer the cooldown time of the secret skill is. The more times the secret skill is used, the longer the cooldown time of the secret skill should be.

Li Mu was about to try again, but suddenly he saw the currency balance displayed in the system and almost screamed. He just made this secret book and actually spent ten taels of silver! Although he didn't lack these ten taels now, he was also very distressed. You know, he upgraded his woodworking skills from primary to intermediate level, which was only about ten taels. Now he has just made a one-time secret book, which actually costs ten taels, which is like making money!

Li Mu was reluctant to try it randomly. In a short period of time, he did not intend to impart skills to anyone, and there was no need to. The fewer skills in the system would be, the more beneficial it would be to him.

But he was still curious about the effect of this secret. Li Mu thought about it for a while and called Li Chongyi over. There were not many people around Li Mu who could trust him. Li Chongyi was relatively reliable. Moreover, he was strong and strong. He could help smelting ore after learning the smelting skills. Besides, it was just a primary smelting at most. Even if Li Chongyi betrayed, the loss would not be very big.

Li Chongyi entered the house, Li Mu closed the door and handed over the secret paper recording the primary melting. When Li Chongyi saw the paper, he waved his hand and said, "Boss, I can't read and can't understand."

This was unexpected!

Li Mu was a little depressed and put the paper on the table again. Li Chongyi glanced at it and smiled silly, "Boss, I recognize the picture. It seems to be a blacksmith."

"Picture?" Li Mu took a look. There were words on the paper, so how could there be pictures! He pointed at him and said, "Did you see the pictures?"

"Yeah!" Li Chongyi nodded and said, "A man threw the stone into the stove."

"Oh, it's interesting!" Li Mu was amazed. The things made by the system were different. The same piece of paper, those who read literate saw words, those who read illiterate saw pictures, and those who read illiterate saw pictures, and those who also had intelligent choices.

Li Mu handed the paper to Li Chongyi and said, "You can read this picture and learn it, and show it to me."

"Oh." Li Chongyi responded, picked up the paper and looked from the head. After looking for a while, his hands suddenly shivered and the paper fell. Li Chongyi looked at the piece of paper on the ground and said embarrassedly: "Boss, my hand is heavy and it has been torn."

Li Mu glanced at the piece of paper on the ground and asked, "Did you remember?"

"Yeah, remember!"

“Go and do it!”

Li Chongyi nodded and turned around to tinker with the furnace. Li Mu thought to himself that it was also an automatic destruction function, which was indeed a secret that could only be used once.

Li Mu lay on the rocking chair and watched Li Chongyi busy. Starting from lighting the stove, he took a step by step, lattice tongs, clamped crucibles, watered and tempered, and separated impurities... It was somewhat different from when he used his skills. It was not so smooth and seemed a little clumsy. Li Mu knew in his heart that it must be because Li Chongyi's skill was not proficient enough. But this was not something Li Mu was concerned about. What he was most concerned about was whether there was a system in his body after Li Chongyi learned this skill.

When the first furnace of ore was melted, Li Mu checked and found that the iron ingots melted by Li Chongyi were basically the same as those he had used his skills. Li Mu held the iron ingots in his hand and weighed them, and the weight was almost the same.

"How does it feel?"

"No feeling!" Li Chongyi replied honestly. For Li Mu, melting a furnace of ore is considered a physical job, but for Li Chongyi, it is just a little exercise.

"Nothing in my head?"

"Head?" Li Chongyi scratched the back of his head, a little confused, and said for a long time: "Nothing is too much, boss, is there something on my head?"

Li Mu said anxiously: "I mean what you are thinking in your head, are you thinking about anything! Think! Do you understand?"

"Ah! Yes, yes!" Li Chongyi looked dazed and said, "Boss, when I was hitting the iron, I was thinking about what to eat this morning! I want to eat meat!"

“…”

Li Mu pointed to the door. Li Chongyi offended Li Mu for some reason, but he still put down the iron pliers in his hand and went out.

Li Mu lay on the rocking chair, thinking in his heart. He has basically figured out the effect of this secret skill. With this secret skill, he can teach the skills in the system to others.

The secret book made by secret skills can ignore whether the object is literate or not, and teach him the skills in a way that he can understand. After learning this person, the things made using the skills are basically the same as what Li Mu made with his own skills. But he only has skills, no system, which is equivalent to learning a craft. However, this method cannot be applied in large quantities. One is because the skills have cooldown time, and the other is that it costs a lot to make a secret book, and only skill level is lower than his own skill level.

But even so, this is a very useful skill. It seems useless now, because the secrets that Li Mu can make are only two categories of primary forging and primary carpenters, which are not valuable. But what if Li Mu raises his skill level to high or even master level? Li Mu is a senior carpenter. He can train several intermediate carpenters. When he reaches the master level, he can train several advanced carpenters. In this way, this skill is simply priceless.
Chapter completed!