Although Li Qingyu recognized that the thing on the picture was a first-level spiritual crystal, he did not make a statement. He just listened to Zhou Xianguang's continued introduction: "This thing is called a spiritual crystal, which is very expensive. At least in our space, we have never found that this thing naturally exists. This thing not only contains spiritual power, but also the spiritual power it contains is exhausted by the cultivator. As long as the absorption array is carved on it, he can absorb the spiritual energy of heaven and earth and restore it to a spiritual crystal containing spiritual power!"

Li Qingyu's eyes lit up and he asked, "What Commander Zhou means is that a piece of spiritual crystal can be used in circulation like a battery charging and discharging?"

"Rechargeable battery? Haha, your metaphor is appropriate. But if you want the spirit crystal to be reused, you must first portray the absorption array on it. Otherwise, after the spiritual power in the spirit crystal is released, it will just enter the garbage pile!" Zhou Xianguang said with a smile.

Li Qingyu couldn't help but feel ecstatic!

When Niu Dahuang handed him fifty-three spiritual crystals, he just told him to hold the spiritual crystal with his hand and use the silent mind method to absorb the spiritual power in the spiritual crystal for himself and speed up the cultivation speed. If the spiritual power contained in the spiritual crystal is exhausted, the spiritual crystal will become a stubborn stone and lose its effect.

Now Zhou Xianguang said that the spirit crystal can be recycled! That's great!

Although the overall spiritual energy on the earth is exhausted, there are still spiritual energy in some places, such as Dongshan Mountain in Dashangou Village, Li Qingyu’s hometown, and Koi Lake in Jinjiao University!

In the future, Li Qingyu puts the spiritual crystals that have exhausted their spiritual power in these places, and can re-suck the spiritual energy of heaven and earth. In this way, Li Qingyu can recycle these spiritual crystals and use them to quickly practice anywhere!

However, Li Qingyu knew nothing about how to portray the absorption formation, so he asked again: "Can Commander Zhou understand how to portray the formation on the spiritual crystal?"

Because the spirit crystal is too precious, Zhou Xianguang didn't expect Li Qingyu to have this thing at all. He thought Li Qingyu was just asking casually, so he said casually: "I don't understand. Currently, only the formation masters in Lingxu Realm understand this. But we also have a special formation research center, where the professors there are overcome this difficulty. Perhaps one day, we can also portray the absorption formation."

"What level of warriors are these old professors?" Li Qingyu asked subconsciously.

"Haha, you're wrong this time. They are not warriors at all, but just researchers! But they are all knowledgeable national academicians!" Zhou Xianguang said.

"Ah? How is this possible?" Li Qingyu said incrediblely. In his impression, cultivation and science are mutually exclusive. How could those scientists know how to portray magic circles?

Zhou Xianguang seemed to guess Li Qingyu's idea and smiled: "The magic array is composed of two parts: array base and spiritual power. The depiction of the array base is to rearrange and combine the molecules of matter based on mathematical models so that they can accommodate spiritual power. This process does not require warriors to participate at all. For example, the magic array on the special bullet for the warriors of the Galaxy Fleet. The design of the array base is completed by scientists from the research center, and the depiction is completed by high-precision lathes. Finally, the injecting spiritual power into the array base and the activation of the array base is done by warriors, and at least a small-achieved warrior in the Xuan Realm can be competent!"

Li Qingyu couldn't help but feel refreshed. This was the first time he heard that the magic circle could be played like this!

It seems that the Demon Stars with developed cultivation civilization are also inferior to those of the earth! At least they don’t know how to carve magic arrays on the spiritual crystals and let the spiritual crystals reuse them!

Of course, it may also be because the Demon Star does not lack spiritual crystals, so no one studies the reuse of used spiritual crystals, right?

"No, you must visit the old scholars in the Formation Research Center when you have time! Learn how to portray formations! Then see if the high-end and sophisticated instruments are for sale. If they are for sale, you must buy one!" Li Qingyu said in his heart.

Zhou Xianguang didn't know what the hell was Li Qingyu's idea, but just manipulated the scroll display on the wall to continue playing the animation.

I saw thirteen spiritual crystals appearing on the scroll screen. After being arranged according to certain rules, they fell into a green field. Then there was a gas like water vapor, which quickly gathered towards the thirteen spiritual crystals from a distance, and then all of these water vapors submerged into the spiritual crystals!

Some of the animals around this spirit crystal began to escape, some gradually died, and the green trees and grass began to wither and wither quickly, and then disappeared invisible by wind and rain. Even the living substances in the soil died quickly, and the soil quickly sanded, and finally turned into a desert!

"This is the simulation animation in which the Hidden Family uses spiritual crystals to plunder the spiritual energy of the world in the first world and then sand the soil. Of course, this is just a simulation animation after all. In reality, spiritual energy is not visible like the animation shows, as it is like water vapor. They are invisible and intangible, and even ordinary people cannot feel it. Moreover, the speed at which the spiritual crystals absorb spiritual energy is not as fast as it is, so the Hidden Family's plunder of spiritual energy in our space is a hidden process, and the formation of the desert is also a gradual process."

Zhou Xianguang said, suddenly remembered something and asked, "By the way, we have been talking about spiritual energy for a long time. I guess you should know what spiritual energy is, right?"

"I know." Li Qingyu told the truth, Niu Dahuang explained it in detail to him.

"Then do you know what the use of spiritual energy is?" Zhou Xianguang asked again.

"It can assist monks in practicing. It is because of the weak spiritual energy and the monks have no spiritual energy to absorb and utilize, so they enter the Dharma-Ending Age, resulting in only warriors on the earth, but few real monks!" Li Qingyu repeated what Niu Dahuang told him.

Zhou Xianguang's eyes lit up and he smiled and said, "Haha, Mr. Li did have an adventure! But Mr. Li only knows one thing, not the other. Spiritual energy can not only assist monks in their cultivation, but also the source of life! It is precisely because of spiritual energy that gives birth to life on the earth! Moreover, spiritual energy also has a strong purification effect on the environment. Now the earth's environment is getting worse and worse, not only because of industrial pollution, but also because of the exhaustion of spiritual energy, the earth has lost its ability to self-purify!"

"The Hidden Family is really vicious! It's so damn!" Li Qingyu couldn't help but complain.

"The sins of the hidden family are more than that. They even went to the First World to find children with cultivation qualifications, and then forced them to the Lingxu Realm to be disciples! Simply put, they steal children! According to our incomplete statistics, from the plane calendar 1956 to today---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Li Qingyu's cheeks trembled!
Chapter completed!