Accepting Mr. Qian's favor can only be repaid later.

After a while, Xu Mo came over with five hundred mid-grade Spirit Stones.

After Su Yun's inspection, these medium-grade Spirit Stones were of good quality and the quantity was correct, so he thanked him contentedly, got up and left.

Su Yun found Yunyao with the purple gold jade token.

Now she is standing alone in the hall, angry at being neglected by the three of them!

Seeing Su Yun holding a purple-gold sign flaunting his might, she got so angry that she directly took out the gold sign and waved it in front of Su Yun.

"The Zijinyu brand is so proud, I am a gold member and I didn't say anything!"

Su Yun didn't care at all, and he didn't mean to show off, he just wanted to ask Yunyao something, but now it's inconvenient to have someone behind her.

"Miss Mo, don't send it off, and leave."

Xu Mo stayed where he was, with that warm smile on his face, and finally bowed slightly to see them off.

Leaving Qingfuhang, they found Huang Jianbing who was waiting outside, and the group walked a long way again, Su Yun took out the purple gold jade tablet again, looked at Yunyao, frowned and said: "This jade tablet needs to be dripped with blood to be bound. Certainly?"

"Why? Are you still worried?" Yun Yao didn't know why Su Yun was so cautious, but she still felt that Su Yun must have his own reasons, so she explained: "This is just a very common blood contract method, used to bind this piece The identity of the jade badge."

To be on the safe side, Su Yun didn't bind the jade token. If there was some means of locking the Qi mechanism hidden in it, wouldn't it be possible to leave a handle.

This trip has been around this circle, and I have gained a lot, and it is time to end.

Su Yun straightened his cupped hands to Yunyao, and thanked, "Thank you, the third princess, for condescending to lead us. It's dark now, so you should go back to the palace first. We'll just find a place to stay. See you at the gate of the palace tomorrow morning."

"To kill the donkey, you're going to drive me away after using it!" Yun Yao frowned, pouted, and said in a resentful tone: "My friendship as a landlord should be exhausted to the end! Come with me!"

After a while, the five people arrived at a quiet place at the foot of Yunfeng. In front of them was a quiet courtyard. When the gate was opened, the courtyard was empty and looked very lonely, and even a few oil lamps were not lit.

There is a pond in the middle, reflecting the mottled light on Yunfeng.

Looking up, you can see Yunfeng rising abruptly.

In the eyes of everyone, Yunfeng Mountain is so tall that it can't see the top. It may be more like a skyscraper than a mountain. You can only sigh that it is the natural craftsmanship that has created such a wonder.

"This is a separate courtyard that belongs to me. You can live in it as you like." Yun Yao said, and took out some array cards, which were the keys to the courtyard.

"The mailing address I left for the Rogue Cultivators I met last time is here. You live here. If she has any information, she can find you."

Then, Yun Yao said something to herself, "I'll come and find you tomorrow morning, that's all, goodbye."

Then waved his hand, Yu Jian flew away.

Yunyao is clearly a prominent princess, but her back looks very lonely.

...

Stepping into the courtyard, Su Yun instantly felt that the Spiritual Qi here was much more abundant than the outside world, and it would not be an exaggeration to say that it is a paradise for spiritual practice.

It should be the Spirit Gathering Formation with high rank.

Seeing this, Huang Jianbing expressed eagerness and joy, and cupped hands to everyone, "Brother Su Yun, Spiritual Qi is abundant here, I'll go to practice first, goodbye everyone!"

"You can do as you please." Huang Jianbing was so polite, Su Yun was still a little uncomfortable.

Then, everyone chose their own room.

Su Yun didn't ask for a place to stay, so he chose one at will.

Wen Bai naturally chose to be next to Su Yun.

And Jiang Mu had a hard need to sleep, so he found a quiet place so that no one would disturb him.

Now that it is almost ugly, there is not much time left for Su Yun to be busy.

He first refined some Baili communicators in case of emergencies.

Afterwards, he entered the spiritual space, and began to deduce and ponder the power system suitable for promotion in Immortal World.

The power system includes a series of equipment such as generators, transmission lines, substations, and electrical appliances.

The principle of technology is not difficult, and with the improvement of Realm and the strengthening of spiritual sense, Su Yun's ability to use the spiritual realm has also increased exponentially, and the entire deduction design was completed in a short time.

And many of the parts can be replaced with Immortal World's Spiritual Qi material, which has better performance, safety and easy maintenance.

For example, in the electric lamps that are to be promoted first, the light-emitting semiconductor materials in them can be replaced by the first-order material fluorite, and the input power can emit dazzling white light.

The magnets in the generator can also be replaced by the Spiritual Qi material, which has a higher magnetic field strength and higher power generation efficiency.

As for the power to drive the engine to generate electricity, it is also easy to solve, such as horses, manpower, windmills, spiritual energy, and even classic boiling water.

There will only be more means of generating electricity in Immortal World, not less.

After simply refining a sample of the power system, Su Yun was satisfied, and prepared to show it to the Emperor Ruiguo for a look at the next day's face-to-face, for some convenience.

After all, most of the folks have the habit of imitating the royal family, and spreading it in the royal family first will also help to promote it among the folks.

Afterwards, Su Yun used the Shenwei Yutu Jue to dig out a huge cave overnight in the basement of his own house, and installed the production line of Yunzi No. 1 Flying Sword and ammunition in it.

A steady stream of ammo and Spirit Stones can always give Su Yun an indescribably wonderful sense of security!

Restrictions were set up everywhere in the cave, and the entrance was closed. Su Yun estimated that there was still an hour before entering the palace, so he started to tinker with some gadgets.

It's like promising a warm and white neon tube!

Neon tubes rely on inert gas to ionize and emit light under high voltage, and the colors of light emitted by different filling gases are also different.

The structure of neon lights is also simple, generally only two parts: glass tubes and transformers.

The transformer part is easy to smelt, but the lamp tube made Su Yun difficult.

Su Yun couldn't find a ready-made material that could replace the glass of the lamp tube!

Such an unusual thing as glass has never appeared in Immortal World.

Although there is also natural quartz sand, it has not been smelted into glass.

So much so that Su Yun doesn't know where to get quartz sand, let alone other auxiliary materials for synthetic glass.

Compared with the machinery industry, the chemical industry in Immortal World is a blank slate!

After all, it is a scientific technology that involves the microscopic level. Without the scientific thinking of studying things to learn, it is difficult to notice the underlying principles of material changes!

The use of various metal ores in Immortal World is only an empirical summary, and there is no exploration of the principles.

So Su Yun's plan to develop neon tubes was stranded at the very beginning, because he couldn't find various basic raw materials for glass production.

Similarly, the inert gas filled in it is also impossible to start with.

He doesn't even know the composition of the surrounding air, whether there are those inert gases he needs!

It seems that chemical technology also has to be accumulated from scratch.

Su Yun had to reproduce Lavoisier's experiment first, and figure out the content of basic gases such as oxygen and nitrogen in the air. After simply making a set of experimental devices, Su Yun ignited the first fire of Immortal World's "chemistry", and exhausted the oxygen in the sealed tank. It was measured that the oxygen content of Immortal World was slightly higher than that of the earth, about a hundred 30/30.

As for other components, except for nitrogen, those complex gases are difficult to distinguish with ordinary chemical methods, and perhaps can only be separated by means of low temperature separation!

The liquefaction temperature of different gases is different, but they are all minus 100, or even minus 200, and Su Yun doesn't know if the ice attribute Magical Item can reach such a low temperature.

At least it is difficult for ordinary ice-type artifacts to reach this level.

It can only be known after obtaining ice-type materials.

Of course, it can be done by purely scientific methods, but it is much more complicated, and various chemical synthetic materials are also hard to find.

After being deflated this time, Su Yun finally understood a truth - the immortal cultivator Duan Ye has its limitations! Complementing each other with scientific technology is the right way!

After tossing, it's almost time to face the saint.

The sun outside had risen for a while.

When he stepped out of the room, he saw Huang Jianbing exercising his footwork on the lake. There was something subtle about it. When he stepped on the water, only small ripples were left.

Under the sun, Wen Bai was helping to take care of the flowers and plants in the yard, and she had a lot of affection for these green plants.

She saw Su Yun coming out, and while picking the dead leaves of flowers and plants, she said softly, "Have you been busy all night?"

"Did it bother you?" Su Yun asked lazily.

"That's not true. I'm cultivating in samadhi." Wen Bai didn't look up, the sun shone on the side of her face, and her fair skin was dyed golden, which looked prettier than those rare flowers.

"Go and wake Jiang Mu up, someone should come later."

"That's right!" Su Yun was instantly alert. If outsiders saw that Jiang Mu liked to sleep in coffins, what would they think of them?

Hurriedly came to Jiang Mu's room, opened the door, and walked to a luxurious coffin, Su Yun stretched out his hand to push it, but saw Jiang Mu lifted up from the coffin, with skillful movements, which might rival Newton's.

"Morning, Brother Su!" Jiang Mu stretched.

"It's getting late, the sun is already drying the coffin boards! And can you not wear a shroud when you sleep in the future, it's so frightening." Su Yun pouted.

Jiang Mu frowned, and explained solemnly: "Shrouds are more suitable for sleeping than pajamas. Otherwise, why don't those who sleep forever wear shrouds instead of pajamas?"

"Nonsense!" Su Yun didn't want to argue, so after a few more urgings, he went out of the room and closed the door.

Soon, Su Yun looked up and saw a group of cultivator Yujian flying by, and finally stopped at the gate of the courtyard, and only Yun Yao landed directly in the courtyard.

Things like etiquette are thoroughly implemented by the royal family!

Yun Yao opened the door and brought them to Su Yun.

"Here, these are the people with outstanding hearing you want. They are all professional listeners in the palace." Yun Yao said in a complimenting tone.

But the group of seven people lowered their heads in shame, listening to the corner is not a glorious thing...

Su Yun took out five freshly refined Baili communicators, tuned to the corresponding frequency band, and handed them over to them.

After explaining a few words, Yun Yao drove them away.

And Su Yun took out some communicators and distributed them to the members of the team for easy contact.

Looking at the sun, it was supposed to be the time to face the saint, but Yun Yao was not in a hurry, but noticed the flowers and plants that Wen Bai had taken care of, and exclaimed, "Why do these green plants grow so well all of a sudden?"

Wen Bai carefully explained: "I have used some means of taking care of the elixir. Many rare plants here can actually be used as medicine, so I couldn't help but do it!"

"If you need it, just pull it out." Yun Yao said generously.

"I appreciate your kindness, but let them continue to be part of the garden scenery." Wen Bai smiled while stroking the waist-high flirtatious flowers beside him.

Even the flower buds in the distance are swaying, as if responding to Wen Bai.

Su Yun saw that something was wrong with Yunyao, and said bluntly, "Yunyao, do you have something to say!"

"This... the inner one..." Yun Yao hesitated for a long time before saying in a deep voice, "My father only announced you..."

"It's nothing." Su Yun didn't know why White Cloud Yao was so entangled, probably because of some rules of the royal family.

"Then walk?" Yun Yao winked and asked tentatively.

"Walk!"

Su Yun is still very fortunate that Emperor Ruiguo announced him, not Wang Fu or anyone else, otherwise he would have missed a chance to promote the power system.

As for other things, Su Yun didn't care either.

Following Yunyao, the road to the palace was green all the way, and many guards let her go directly when they saw her, without even interrogating her.

Soon, the two of them went straight up and flew to the top of Yunfeng, which is the most prominent place in the palace, Ziwei Palace!

The emperor's affairs and life are here.

Other palaces are scattered throughout the Yunfeng mountainside.

In front of the Great Hall of Ziwei Palace, Su Yun saw three familiar voices, they were all standing by the door, not daring to go in.

"Why are they here?" Su Yun asked, "Didn't they just announce me?"

Yun Yao's face was a little anxious for a moment, "I wanted to inform them, but they came to wait in front of the Great Hall early and told them about the situation, but they still chose to stay here."

Then Yunyao's tone was gentle, and she said with some reproach: "I wanted to use the Baili messenger to notify them last night, but someone took my messenger and used it as a means of monitoring! Go and explain to them!"

In short, this matter made Yun Yao feel a little embarrassed.

"Well, it's my fault." Su Yun admitted his mistake in a low voice.

The two flew over and greeted casually.

When Wang Fu saw Su Yun, he still nodded eagerly and handed over the written materials he had prepared, which summarized the existing information and his plans.

"Junior Brother Su Yun, please show it to the emperor, I have an explanation."

"Heh!" Wang Chong still had a cold expression on his face, "I said Senior Brother Wang Fu, you might as well leave the responsibility of team leader to Su Yun. After all, Emperor Yun only sees him alone, so let him give the limelight. oh."

Wang Fu smiled awkwardly, mediating from it, "Who does Emperor Yun see? It's all for the mission, so you should say less."

Then he turned around and looked at Su Yun, his eyes were more or less bitter, but they were drowned by dry laughter, he casually cupped his hands, "Then Junior Brother Su Yun, let's take our leave first."

He didn't even wait for Su Yun to respond, he turned around and flew away with his sword.

Su Yun didn't even have time to say anything.

Seeing the three people going away, Su Yun felt very uncomfortable, and this was not his intention.

Yun Yao was a little embarrassed, so she had to pull Su Yun and approach the Great Hall.

The huge Golden Luan Palace was empty, without civil and military officials, no eunuchs and maids around, but a dragon chair was placed in the most prominent position, and a middle-aged man with a casual posture sat.

He was full of air and a little joking, "Are you Su Yun?"

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