It was already early in the morning, and Li Yunfei was still quickly drawing drawings in the design institute, which were the design drawings of several new equipment. After saying that, when he really wants to design something and draw some design drawings, Li Yunfei usually doesn't stay in the palace.

Because Li Yunfei really can't calm down and do things in the palace, Xiaobu will always be very enthusiastic to massage himself and beat his back with tea and drip water, Diao Chan is always very enthusiastic to stew soup for himself, Zhen Mi always wants to ask himself for some things about literature...... In fact, the main problem is that these singing beauties are all beautiful, and their own concentration is average, and they can't withstand the various temptations of their sisters.

The equipment being designed is for oil refining, and the oil refining industry is about to officially start, this kind of brand-new industry, of course, no one knows how to get this, so Li Yunfei can only design some equipment for everyone to do first.

This oil refining industry was originally launched so quickly, but Guangling, a few hundred miles away, accidentally discovered an oil field, so this industry was officially launched.

At that time, they were just going to dig a deep well, the purpose was just to get water for irrigation, but they accidentally found a kind of black oil, and the matter was quickly reported to the magistrate, and the magistrate, who happened to be one of Li Yunfei's disciples, was still a little knowledgeable, after seeing the black oil, he hurriedly sent some samples to Li Yunfei, so the oil refining industry was officially launched a long time in advance.

Oil refining sounds like high-tech, in fact, the process is not too complicated, only the crude oil needs to be preliminarily processed, and then through heating distillation and separation, gasoline, diesel, kerosene, asphalt and other things can be obtained, of course, when the chemical industry comes in the future, there will be countless petroleum products have been developed.

When the sky is slightly bright, I finally got all the design drawings of several equipment, in fact, there is a single-cylinder engine design drawing, since you can diesel and gasoline immediately, then the diesel gasoline engine is best to get out, so that the diesel can really make perfect use of diesel.

Maybe in a year or two, a simple tractor or motorcycle will be able to run all over the streets in a hurry. It was primitive, but if it was used for transportation, it would be much more powerful than a horse-drawn carriage.

As for the current industrial base, whether you can make a single-cylinder engine, to be honest, I used to think that I could get it, but after seeing Huang Yueying's generator, I can indeed be sure that there is still a way to build it with the current means, and the lathe has been processed and upgraded to the second generation, and the accuracy has also improved a lot, but the processing of a simple single-cylinder engine can barely be done.

"Thirty-nine, send this drawing to Huang Yueying, and send this to Ma Jun." A bunch of drawings, each packed into two large bags, handed over to Thirty-Nine for a command.

"No...... Your Majesty, today is the day when the two ladies officially enter the palace! Thirty-nine reminded in a whisper after taking the two large bags of drawings.

"I know, that's why I stayed up late to get things done!"

"Do you need to call a carriage to deliver it?"

"No need, you can send the drawings over first, let them get a few pieces of equipment as soon as possible, and I'll ride back by myself." Saying that, Li Yunfei walked out of the design institute directly, took the war horse from one of the guards, jumped on the horse and galloped away, and more than a dozen guards could only try to keep up.

……

Of course, there are no pedestrians on the street when the genius is slightly bright, so Li Yunfei can also rest assured that he can ride a horse and gallop, he just wants to go back early and sleep well, recharge his energy, and really ride a horse at night, it is a long-awaited ......

Suddenly, I felt a flash of white light in front of me, and a figure appeared on the empty street, an old man with white hair and a plain white robe, seeing that he was about to collide, Li Yunfei was also in a hurry to pull the reins, but something more unexpected happened, the old man glanced at himself, was slightly stunned, and then there was a burst of white light, and the person disappeared silently, from appearance to disappearance in less than a second.

It is indeed a little unbelievable that such a bizarre thing would happen, and what makes Li Yunfei even more puzzled is that this old man looks very familiar, with the blessing of dynamic vision, the old man looks very clear, and there is always a feeling of déjà vu.

The beard and hair are all white and he is dressed in a white robe, which looks like a fairy wind and bones, which makes people feel close at a glance...... Li Yunfei carefully searched his memories, and soon remembered the events of his previous life, when he went to the parallel world of the Northern and Southern Dynasties in his dream, and then entered the gate of time and space, and met an old man in the world of cultivators......

Now it is almost certain that this world has some kind of special connection with the world of cultivators who had been to the Tao in his dream, and perhaps there is also a connection channel such as the gate of time and space, otherwise it is unlikely that the old man would suddenly appear in this world.

Dismounted and carefully walked around the same place for a long time, and did not find anything abnormal, so he could only continue to ride back to the palace.

In his heart, he began to think about how to find the gate of time and space in the future, if there is still a chance to go to the world of cultivators, then can he still use the coordinates of that formation to discover that medicine valley?

If you find Medicine Valley, can you go to another parallel time and space? I don't know what the situation is in that world now, are they okay......

"The concubine welcomes His Majesty back to the palace!" Diao Chan, who was exercising in the morning, saw Li Yunfei coming back, and hurriedly came over to greet him.

"Hurry up, how many times have you said it, there is no need to salute between you and me!" Li Yunfei hurriedly helped people up.

"Etiquette cannot be abolished, concubines need to lead by example!"

"You only need to make a show at some important celebrations...... Well, it seems that your complexion is not very good, so don't get up so early in the future, smelling the chicken and dancing is not necessarily good for the body. I wanted to continue, but seeing that Diao Chan was also a little haggard, I didn't say anything.

"Thank you Your Majesty for your concern, it's just that Your Majesty is no longer in the palace, and the concubine always doesn't sleep well!" In fact, she is not jealous because she helps take care of the affairs of Xiao Qiao's entry into the palace, but she is always a little unhappy in her heart, and she doesn't want to face those things, but now as the master of the harem, she has to face all this and pretend to be very generous, so it is a little hard.

Li Yunfei is not a stupid person, of course he knows this, but he has given her the most honorable position, and he still cares about her, it seems that he has really done a good job by the standards of this era.

"Cicada, it's been hard for you these days!" I'm so careful.,Of course it's fake to say that you don't feel guilty at all.,Although I'm already very engraving.,It's just that there are still several beauties in this harem.,As a normal man.,Many times I really can't control my lust.。

"The concubine just did what she had to do, and it wasn't hard, but Your Majesty doesn't seem to be in good spirits, so you should take care of your dragon body!"

"Well, I'm not a dragon, I know a dragon!" As soon as Diao Chan said about the dragon body, Li Yunfei suddenly remembered the green dragon, as well as the reminder of the increasingly huge big black, and he didn't know how their current situation was different.

“…… Your Majesty has seen a real dragon? Although it seemed a bit disrespectful to ask such a question, it was still asked.

"Of course I did...... But I've seen it in a dream, I'm really sleepy, little beauty, can I sleep with you in my arms, I like to smell you. ”

Although he was still asking Diao Chan's opinion, but before she could answer, Li Yunfei had already gone back to the room with someone, this time he really just hugged her to sleep, as a person whose soul has not been replenished, he has not slept all night until now, and he has not fallen asleep yet, which is already very remarkable.

Of course, there is one of the most important reasons, tonight is to face the big event of the two sisters together, but you have to recuperate, so as not to be cleaned up by the two sisters when the candle night is spent in the cave room, and then in front of the two of them, it will be a little embarrassing.