For Tan Wei's performance, Purple Pigeon Yuanzun was very satisfied, Tan Wei did not waste the power she gave her to enter her library, since she could see the problems of this world so quickly.

Now that she understands the problem, Zige Yuanzun knows that she has received a good seedling, so she is naturally not stingy, and gives her a lot of opportunities to read her treasured literature.

After leaving from the Purple Pigeon Yuanzun, Tan Wei wondered if his mission here was to use recyclable resources to change the living environment here.

What recyclable resources does she know about? In the real world, wind and water can generate electricity, but she is not a science student!

Although she had learned these things in physics in middle and high school, she had forgotten them.

It seems that if you want to complete the task, you have to find foreign aid and go to the library of the Purple Pigeon Yuanzun to learn relevant knowledge.

After Tan Wei determined the future development direction, Xi Heng's formation learning also made progress.

Regarding the formation, after Xi Heng got started, his skills improved by leaps and bounds, and seeing his learning progress, Tan Wei couldn't help but be jealous when he thought of his difficulties in learning in the interstellar world.

"Tan Wei, take a look at this work again."

"You're already a junior formation mage." Seeing Xi Heng's works, Tan Wei affirmed.

After getting Tan Wei's answer, the smile on Xi Heng's face couldn't be hidden.

"Junior Formation Mage? Then my technique is a little better than that of Shan Yang pear. ”

"Of course, although Shan Yangli is the first entry, in terms of talent, she is not as talented as you, so she still stays in the introductory technique."

Tan Wei didn't say a word, and Shan Yangli didn't have her to open a small stove for her. Even if she wanted to work hard, she couldn't find a way.

"She is a high-level primordial girl, whether she is a formation mage or not has little influence on her." As an indigenous person, Xi Heng, like Professor Xianyang, is the obligation of their Gewu Academy to make things in this regard.

"Xi Heng, have you ever thought that this world only relies on yuan energy and nuclear energy, and the way of energy source is too simple."

Especially Yuan Neng, in Tan Wei's understanding, Yuan Neng is that Yuan Nu uses her body as a medium to quickly absorb the sun's rays through cultivation, store the micro elements in the sun's light, and then force those micro elements out through specific means.

Men need women to provide them with some yuan energy from time to time, that is because their bodies do not absorb a small amount of sunlight in the air, so their bodies lack those micro elements, and can only absorb a little bit when they release a large amount of those micro elements.

"Since ancient times, human beings have used these two ways to obtain energy, is there any other way?" Xi Heng knew that Tan Wei was not a person with no purpose, and she must have a reason for asking this.

"On this planet, we are now facing the point where both energy and nuclear energy are running out, and I think we should make some changes."

There is no development without change, and Xi Heng understands it.

"Where do you think we should go?"

"Isn't there wind and water on this planet? Maybe we can turn them into energy. ”

"I don't know if the wind can make energy, but water, other professors have thought about it, and they can get some energy by breaking it down into molecules, but unfortunately, the cost of getting that energy is not lower than that of nuclear energy."

As students of Gewuyuan, they have to look at various cases and do countless experiments every day.

What Tan Wei said, they have also considered, but the experiment is not good.

Tan Wei has not had much contact with how to do wind energy, but it is not difficult for Tan Wei to know how to use flowing water to generate electricity.

When she was a child, she lived in the countryside, when there was no electricity there, and the families who needed electricity had to buy a small household generator to generate electricity.

In her very small memory, she was often called by her father to check the water level at the place of his generator because there was not enough water at times.

"When I talk about the principle of using wind and water to generate electricity, I don't mean that you can break down water into molecules, but that you use the power of wind and water."

Hearing Tan Wei's explanation, Xi Heng's eyes lit up, "That's right, the blowing of the wind and the flow of water are both a kind of power. ”

Speaking of this, Xi Heng thought of Tan Wei's origin, and he asked: "Have you ever seen something that uses the power of wind and water to make energy?" ”

"I've seen it, but I won't."

"It doesn't matter, do you know the principle?"

Seeing Xi Heng's hopeful eyes, Tan Wei couldn't bear to refuse, so she had to pick up the pen and draw a simple sketch of using the impact of flowing water to generate electricity on it.

"So it's okay?"

Xi Heng has even seen the principle of nuclear energy, let alone this way of using flowing water to generate electricity.

"I asked the Purple Pigeon Yuanzun about this today, and there should be knowledge of this before the dark day, but unfortunately, after the dark day, the geology is unstable, and it is not suitable for building infrastructure in this area."

"It's normal for this principle to be abandoned, according to the drawings you made, the energy created in this way is not strong." Xi Heng said this, which can be regarded as giving Tan Wei more face.

Tan Wei also knows that the principle of this household generator is indeed very chicken, and in her memory, this kind of generator often loses power.

"It's just a simple principle, and if you expand this principle tenses, hundreds, or thousands of times, that energy will be very large."

"You're right, I'm going to look into it."

Xi Heng is willing to study, but Tan Wei can't ask for it.

According to the Purple Pigeon Yuanzun, their Yuan Girls have to cultivate and do research again, plus they are too busy to do all sorts of things.

After handing over the drawings to Xi Heng, Tan Wei didn't care anymore.

Time flies quickly, and in the third year of the laboratory's establishment, Tan Wei finally broke through to become a seven-star yuannu.

According to her agreement with the Purple Pigeon Yuanzun, as long as she becomes the Seven Star Yuannu, she will officially accept her as a student.

It is a very honorable thing to become a student of the Purple Pigeon Yuanzun.

After this news spread, Tan Wei was on the banquet list of the Duyang royal family.

The Purple Pigeon Yuanzun has a lot of things to do, and he can refuse the royal family's banquet on the grounds that he is too busy.

However, Tan Wei can't.

At the same time, Xi Heng, who became a student of Professor Xianyang, also received the invitation.

On the day of the banquet, the two cleaned up, got into the carriage sent by the royal family, and rushed to the manor where the royal family held a banquet.

This royal banquet was not the banquet of King Duyang, but the second princess of King Duyang, Duyang Rongle, who entertained the younger brothers and sisters in the college on the grounds of nostalgia for the life of the college.

"Second sister, it's just a few students, is it necessary for you to be so attentive?" Duyang Sishao didn't understand the second princess's approach.

"The Yuannu Academy and the Gewu Academy in this realm are different from the previous realm, you didn't hear a little wind in the academy?" Duyang Rongle was very suspicious of this half-brother's attitude.

Duyang Sishao has always looked down on the losers of the Gewu Academy, and in the Yuan Women's Academy, except for a few Yuan girls who were messing with him, how could he be in the mood to pay attention to the others.

"Second sister, it's not that you don't know me, how can I care about this."

Thinking of this younger brother's reputation, Du Yang Rongle despised it in his heart, and he really didn't show it on his face.

"It's just to find a few people to chat with me and see what the new students are looking like now, why do you mind so much."

"Second sister, your time is precious, see you waste your time on inconsequential people, I'm not worth it for you!"