In three hours, the spirit body collected more than tens of thousands of cubic meters and weighed tens of thousands of tons. This efficiency was too high. Even the entire Ming Cave Star, tens of thousands of mining workers, and the use of countless mechanical equipment, were far from comparable to Du Jingyan's spirit body.

"Okay, let's go back, you're ready to start working. Every five days, at least one drop of Mingjin liquid, one drop is missing, so you don't think about getting the wages." As he said that, Du Jingyan took Ye Feng back to the fixed eye number.

Ye Feng's cabin is quite large, and the decoration inside is comfortable and beautiful, with a hint of feminine warmth. After taking a cold shower, Ye Feng found Soul Gold in the storage room. Soul Gold is the white fluffy accompanying creature. It turns out that Du Jingyan had known this kind of thing for a long time, and it also has his own name.

The practice beads have no way to deal with soul gold, and they must use ancient extraction methods. After searching for a while, looking at the labels above, Ye Feng brought a storage box of one cubic meter and filled it with bright gold. This thing doesn't need to be weighed, one cubic meter is exactly one ton, which seems to be the density difference from the pure water of the four-star standard in the sky.

Sitting cross-legged in the storage box filled with soul gold, Ye Feng sank into the spiritual sea, controlling the empty spirit, and began to slowly transform soul gold. An energy bead was added in his body, and the conversion speed was significantly faster. This time, it took about three hours to complete the conversion of a drop of Mingjin liquid.

After sensing, the spiritual plant had no need for it, but Ye Feng did not take out the bright gold liquid from the middle of his eyebrows like before, but let it exist in the spiritual sea.

He still remembers that after the first transformation, he felt weak from the depths of his soul, his whole body was weak, his eyes turned black, and he would faint at any time. But this time, although he felt tired, it was obviously not that heavy.

After a while, Ye Feng took out the practice bead and entered the state of practice again. Perhaps the interval was too short, and the time to absorb energy this time was shorter, and only a few minutes, the soul energy became weaker and could only stop temporarily.

"Ye Feng, what is the conversion rate of Mingjin Liquid?" Du Jingyan's voice came from his ears. Ye Feng breathed a sigh of relief. Fortunately, he was careful enough. This woman was indeed monitoring him at any time.

"About five cubic meters." Ye Feng said calmly.

"You have a light brain in your room. You can use it when you are resting." Du Jingyan finished speaking, and then no longer had a sound.

"Oh...thank you..." Ye Feng finished speaking and patted his face. During this period, he said the most.

In the cockpit, the spirit body showed a satisfied smile: "It seems pretty good. His empty spirit is very good. The five-to-one purification ratio is at least the best choice."

"The soul ability is too poor." Du Jingyan shook his head and said. Ye Feng's purification efficiency is still very high, but unfortunately he can work too short every day.

If you change to a slightly stronger apprentice, you can purify at least one drop of Mingjin liquid in a day. Of course, not all apprentice apprentice have such abilities. Everyone’s virtual spirit is completely different. Even if they are the spirit of the heart, there will be too many differences in many details.

Although the soul gold is rare, as long as you are willing to spend time, you can always find it. However, there are very few empty spirits that can extract Mingjin liquid. Not to mention ordinary apprenticeships, even Du Jingyan himself does not have such ability. Otherwise, why bother to grab Ye Feng by his side?

"Yan, the price you paid seems to be too low. A drop of Mingjin liquid is worth at least three thousand spirits."

"Hmph, there are quite a few, one spirit a day, even those guys who come out of the four stars in the sky may not be able to make it." Du Jingyan was like a blood-sucking capitalist, and felt that the price he gave was too high.

Of course, with her ability, this little spirit is nothing, I just don’t want to give Ye Feng too much. Such a person will accumulate enough Mingjin liquid in two or three years, so it’s better to send him back to the four stars in the sky.

"The light brain... Where is the light brain?" Ye Feng walked around his cabin for five or six times. There were many facilities he had never seen before, but where is the light brain? He did not see any equipment similar to the light brain.

"It's not this thing, right?" Ye Feng found a crystal pillar beside the bed and stretched out his hand.

There are four such crystal columns in the room, and I don’t know what they are for? Each crystal column looks similar, but the location is different, and there are different colors flowing inside. The one in front of me is red.

"Idiot, that's a lifesaving system. Do you want to fly out of the fixed eye? The light brain is on the table, and the green button is." Du Jingyan's voice came from his ears.

"Oh...thank you..." Ye Feng replied casually with expressionless face, and his heart rolled in. Du Jingyan was really everywhere on this fixed-eye ship. Did she peek at the toilet when she was using the toilet?

The table is very big, and on the left side of the room, a large recliner looks very comfortable. In fact, it is really comfortable to lie on it. Ye Feng had tried it once before, and it felt better than the bed.

After searching on the table for a while, there was indeed a green button. I stretched out my finger and pressed it. A green crystal pillar rose on the table.

"Why are they all pillars?" Ye Feng murmured to himself, reaching out to hold the crystal pillar. Unexpectedly, when the crystal pillar started, it spread along his fingers like mercury, and wrapped Ye Feng's whole person in a moment.

"Damn...what is this."

"Idiot... This is a photosensitive brain. I lie on the chair and study it myself." Du Jingyan's voice came from my ears again.

Sising the photo brain? Ye Feng has heard of this name. This thing is the direction of the development of the four-star photo brain in the sky. It is said that there are laboratory products. If you want to fully promote it, it will be possible at least a hundred years later. Unexpectedly, there are already mature physical objects here.

Ye Feng's whole body was wrapped in a layer of green, but he didn't feel any discomfort. He lay on the chair, his eyes changed, and he seemed to enter another space.

"Virtual Reality Technology..." Ye Feng was not surprised when he looked at the changes in front of him. After all, the virtual reality of Sky Four Stars has begun to be applied, but the effect is not good. At least the power armor training is not practical in virtual reality. Not only does it lack gravity sensing, but the realism of pain system and force feedback, but it is much worse.

Sky Four Stars uses virtual reality and can only play games and train power armored warriors. The effect is really poor. No matter how good you play in virtual reality, it is a mess if you really use power armor.

The virtual reality space in the brain is not too big. There are more than a dozen rooms and dozens of doors. Each door has a password. Now Ye Feng can only enter one of them. The sign hanging on the room says the material directory room.

This is a library with dense three-dimensional books in it. Ye Feng took out one and clicked it on it. The contents of the book were presented in front of Ye Feng in a three-dimensional way. There were words, pictures, and videos, and detailed explanations.

"There is so much content for a book?" Just a casual look was enough to surprise him. There were at least thousands of such books in this library.

Ye Feng has never studied optical brain specifically, and he also knows that the amount of information stored by ordinary personal optical brains is limited. If it were replaced by the optical brain in Ye Feng's home, such books can only be stored at most about ten books.

"Basic matter, biological, plant, mineral, liquid, energy, soul?" Ye Feng looked at the material classification on rows of bookshelf, and looked at the flowers.

"So many... when can I finish reading it?" Ye Feng moaned. His IQ was not high and his memory was only average. He could recite a normal high school textbook dozens or hundreds of times. But the content of each book here is hundreds of times that of high school textbooks. Even if he read it, it would take a long time, let alone remember it all.

"Hmph, it's so easy to be a distributor. These are just basic materials learning. Only after memorizing them all can you learn advanced materials learning." Sure enough, Du Jingyan was everywhere on the fixed eye, and Ye Feng's muttering to himself in Guang's mind could not escape her ears.

"Can you recite all the contents?" Ye Feng couldn't believe it. There was too much. Even if Zhang Kuangshi came, it would probably take decades.

"Hmph, go for a dream, basic materials science, basic allocation, psychic application science, basic allocation principles, and equipment production are called the five basic subjects. Only after all these five subjects are completed can you be qualified to become a tutor apprentice." Du Jingyan said angrily, he is an intermediate allocation master, and this kid actually doubts his ability?

"Are you appointing an apprentice?" Ye Feng asked curiously.

"Idiot... Yan is an intermediate distributor. Can the apprentice be compared with the distributor?" This time, he couldn't even help but cursed in Du Jingyan's tone.

"Oh...thank you..." Ye Feng responded casually. After saying that, his face changed and he smiled bitterly. Damn... What's the thank you for? During this period, he has really been miserable by Du Jingyan, and he has become accustomed to it.

Basic material is the simplest, with only ten books in total. Open the first one, and a string of words pops up. This is the general outline of basic material materials, a thick male voice, constantly explaining in extremely nice interstellar linguistics.

"Basic matter is the purest matter in the universe. Most of them belong to the classification of energy matter, and a small part is physical matter. This type of matter is extremely difficult to obtain. Human utilization rate of it is very low. Even if you get a little occasionally, it can only be used for research. Due to the limited quantity, the research value is not high..."

The low baritone kept explaining, from all aspects, about the existence of basic matter and the importance of basic matter. Human beings understand such an important thing, and it is the least one among all matter categories, and almost rarely can be applied. Any basic matter that can be applied can be called advanced material materials, and the lowest level can also reach S level.

Ye Feng had seen the materials in the experimental cabin before. Among the many storage cabinets, there were from F to C, but there were no ones above C, but there were no ones above C. Level S should be a better material than A.

Then looking down, Ye Feng found that this set of basic material materials is more like a basic astronomy tutorial, and there is not much content on materials.

Until Ye Feng started to vent his anger, he only read less than one-tenth of this book. You should know that the content in this book is more about the various reasons for the emergence of natural astral bodies, as well as the possible formation of matter and energy under different conditions. There is not much content that Ye Feng needs to remember.

Of course, when Ye Feng gave up seeing thousands of books in this library, which was just one of the five courses that apprentices had to learn. He knew very well that with his intelligence, if he wanted to learn all these contents, perhaps his grandson would be married.

If you really want to study, you may not be able to become a tutored apprentice when you die. Ye Feng doesn’t have that much time and is wasting his study. In his previous life, Ye Feng didn’t like studying very much. He is more willing to control his power armor and wield his saber to fight.

"I'm asleep...good night..." Ye Feng withdrew from his brain and lay on the big bed, falling asleep in a blink of an eye.

In the dream, Ye Feng found that he was in a wonderful space, and in front of him was a towering tree that was not tall and could not be seen. In a very high place, among the leaves, there were several huge fruits of light.

"This... it looks so familiar here." Ye Feng patted his forehead and finally remembered that when he passed through the cracks in the space, he would have hallucinations. Wasn't it this big tree that he saw at that time? He still remembered that there was a messy creature dancing in front of him, and he didn't know what it meant.

"Big tree? Chaotic? The fruit of huge light..." Ye Feng's eyes were dull. Why did he feel extremely familiar? It seems that he had seen it somewhere?

Ye Feng walked under the big tree and reached out to caress the big tree. A feeling of pleasure passed from the tree pole and followed Ye Feng's hand.

"Damn... is this thing alive?"

"Bao, babe, babe... Of course, the big tree is alive. I mean, do you have feelings?"

A more pleasant feeling was passed on, and there was a hint of ridicule, as if laughing at the stupid words Ye Feng had just said.

"Okay, you are alive, you are very happy, I know, who are you..." Ye Feng spoke to a towering tree like a fool. In front of this tree, Ye Feng's figure was as disproportionate as an ant facing a mountain.

A book popped out of the tree pole and opened in front of Ye Feng. It was the first volume of basic material that I saw in the virtual space today.

"What... what does this mean?" Ye Feng flipped quickly, and the part he had finished reading today was word by word. A lot of notes appeared in front of Ye Feng's eyes, while the part that Ye Feng did not see was blank.

"This... this is so fucking dick? I can remember as much as I see? But where do I go to find you? I have to dream every time? Or just pass through the cracks in the space?" Ye Feng was a little dizzy. This tree actually had a memory function, which was definitely a good thing. Ye Feng knew very well that his memory could only be considered ordinary.

The evolution of the four-star human beings in the sky needs to be improved. The brain capacity is limited. Remembering important content will naturally forget the unimportant content.

Ye Feng knocked on his head and murmured to himself: "Big tree, fruit, messy creature... this... isn't this?"

Ye Feng tried his best to stimulate himself, but after no matter how long it took, he finally woke up from his dream. His eyes were not opened and he sank directly into the spiritual sea.

The empty spiritual sea, the palm-high spiritual plants, the messy and empty spirit...

Compared to the scenes in the dream, the difference is too far, but if these three things are magnified countless times, they are eighty-score similar to what they see in the dream. As for those strange creatures, Ye Feng already had speculations in his mind, but he was not sure.

Are I seeing the future of the Linghai?

Ye Feng's consciousness floated in front of the spiritual plant, and reached out to touch the main pole of the spiritual plant carefully. It was too fragile and seemed to break at any time.

"Spiritual plants, where is my book?" Ye Feng's mind kept conveying this message.

The empty spirit floated over, one tentacle connected to the main pole of the spirit plant, and dozens of other tentacles weaved a very simple book in the air.

Although he looked a little weird, Ye Feng still recognized it. This was the cover of the book I saw today.

"I want to see the content inside." Ye Feng conveyed his message again.

The tentacles were constantly changing. A few seconds later, the content of the first page appeared in front of Ye Feng. It was full of words, without sound, and even the words seemed very rough. It required careful definition to see what was written.

"Flip to the last page." Ye Feng issued a new order.

The tentacles were woven quickly, and a few seconds later, the content of the last page appeared in front of Ye Feng. This picture is a picture. Compared with the simulated pictures displayed using virtual three-dimensional technology in the virtual network, if the person who is not familiar with this thing can't even tell what it is.

"It's really... it's really..." Ye Feng's eyes were straight. Does Lingzhu and Xuling have such functions? I haven't heard of it before.

"Find the total number of S-level basic materials." Ye Feng's eyes rolled and conveyed a new information. This time he did not ask to turn to a certain page, but specified the search information.

Now he has only read one of thousands of books, and it is only a small part of the content. As he watches more content, the more he needs to remember. Even if the spiritual train can copy all the content, it is a big problem to find it.

Ye Feng knew very well that with his current intelligence, even if he took the open paper exam, he was afraid that he would not be able to escape the fate of zero points. Not to mention a tutor, even the knowledge needed to be mastered by apprentices is huge.

Moreover, this knowledge is not just forgot to read it, but may be used at any time in future work experiments. If it is just stored in the optical brain, anyone can become a distributor.

This time, Xu Ling's reaction was much slower, until the spirit plant kept shaking for a while, Xu Ling's tentacles moved again, weaving a planetary text.

The content in the book currently shows that there are 188 known S-class basic materials.

"Damn... it's developed..." Ye Feng clenched his fists and waved them hard. Unfortunately, this is the spiritual sea space. All he has is Ye Feng's consciousness, no body, and even clenching his fists is just his own feeling, let alone his desire to make a sound.

In the spacecraft, it is impossible to distinguish the time with light. After Ye Feng got up, he found some food, dealt with it, and came to the storage cabin again to start his work today.
To be continued...