Having many children brings many blessings; the struggle for power begins with marriage.

After subduing Wu Yunwan, Lu Chen stopped going to her room every night. These past few days, he's been busy playing horseback riding games on the grasslands with Xiao Wenyao and Yelü Nanyan.

To be honest, Lu Chen was almost ready to give up on getting Yelü Nanyan or Xiao Wenyao to have his child. After trying for so long, their bellies hadn't shown any signs of pregnancy.

Lu Chen wondered if he had become a pseudo-celestial being, which made it even more difficult for him to get pregnant. Chu Yuqin was able to conceive on her first try, so why couldn't other women? Moreover, even Wang Qingci, who was stubborn and didn't want to get pregnant, was won over, but Yelü Nanyan and Xiao Wenyao, who were the most cooperative, couldn't.

Lu Chen even planned to let Mu Zixuan and the others try again. Although Mu Zixuan, Zhou Youyou, and Zhou Xiaoxiao had all become martial artists, their cultivation levels were still relatively low, and they were still in a stage where it was relatively easy for them to get pregnant. If all three of them got pregnant, then it would have nothing to do with him.

If none of the three women are pregnant, it proves that entering the pseudo-celestial realm has indeed made it much more difficult for him to conceive. If he wants to have children in the future, he will have to put in much more effort.

After a period of verification, neither Mu Zixuan nor Da Zhou and Xiao Zhou were pregnant. Lu Chen basically figured out the reason. It was indeed not a problem with Yelü Nanyan and Xiao Wenyao. It was because he had broken through to the pseudo-celestial realm, which made it more difficult for them to conceive.

Lu Chen had no good solution to the issue of realm-limited reproduction, so he decided to ask the system if it had any good solutions.

It was dusk at the Northern Prince's Mansion.

The Northern Prince's Mansion was quite busy today. Lu Chen stood in Fengyun Courtyard, watching the servants bustling about.

At this moment, apart from Wu Yunwan and Murong Xue'er, almost all of Lu Chen's wives and concubines in the inner courtyard were gathered in Fengyun Courtyard.

Today is a special day; it's the day the electricity was restored.

Lu Chen and his team have already figured out how to make light bulbs and have set up the circuit. There has been a lot of activity at the Prince's Mansion these past few days, and the craftsmen have been busy setting up the wiring every day.

Laying electrical wires is a huge undertaking. Rubber and plastics didn't exist at this time. Although Lu Chen had obtained the blueprints for gasoline refining, the conditions for developing the petroleum industry were simply not present in the northern country at present.

Lu Chen did set up a resource exploration department, sending them to explore for resources such as oil and coal.

However, the department has mainly discovered coal mines, or iron and copper mines; finding oil remains quite difficult.

To find oil, you have to drill, but drilling is difficult, ultimately because the necessary conditions are not available.

Since rubber and plastic are unavailable, we must find other materials to replace insulators. Under the existing conditions, the best insulators are glass and ceramics.

For aesthetic reasons, Lu Chen ultimately chose ceramic pipes. During this period, the ceramic workshop at the Northern Prince's Mansion worked overtime almost every day to produce ceramic pipes in order to lay electrical circuits for the Northern Prince's Mansion.

The laying of ceramic pipes would normally take half a day, but Lu Chen saw that there wasn't much work left, so he decided to work overtime tonight to get the craftsmen to finish it. He couldn't wait for the Northern Prince's Mansion to enter the electrical age.

We used candles every night, but the candlelight was dim and there was a strange smell.

As a time traveler, Lu Chen had long since grown tired of living with candles for light.

Lu Chen stood in the courtyard watching, while his wives and concubines curiously gathered around the craftsmen, watching them check the circuits and install light bulbs.

They had already heard Lu Chen talk about the generator and lights while they were eating. At the time, they found it incredible, as it was the first time they had ever heard of electricity being confined and used.

Lu Chen glanced at the busy crowd and said to the system in his mind, "System, if the higher my cultivation level, the less likely I am to have offspring, then when I break through to the Celestial Realm, or even a higher realm, won't your system become useless?"

[The host's worries are unnecessary. Even if the host breaks through to the Celestial Realm, or even becomes an immortal, the host can still impregnate his wives and concubines, it's just a matter of probability. Of course, this world cannot support true immortals.]

Upon hearing the system's reply, Lu Chen frowned. Although that's what the system said, he had already proven through practice how difficult it was to have a child these days.

Even as a pseudo-celestial being, he already has such difficulty in having offspring. Once he breaks through to the celestial being realm, won't the difficulty increase by an order of magnitude?

No, he had to have as many children as possible while his cultivation level was still relatively low. Thinking of this, Lu Chen glanced at the delicate bodies and buttocks of his wives and concubines in the courtyard.

It seems I'll have to work hard before I become a celestial being.

Just as Lu Chen was lost in thought, Mo Xing came to his side and said, "Your Majesty, the circuit has been fully tested and can now be powered on."

Hearing this, Lu Chen snapped out of his daze and immediately said, "Okay, let's prepare to turn on the power!"

At this moment, Mu Zixuan and the others returned to Lu Chen's side. Chu Yuqin looked curiously at the glass-like objects pressed against the door and asked, "Chen'er, do these things really light up?"

Lu Chen smiled and said, "Just wait and see, it will be lit up soon."

At this point, Lu Chen said to Mo Xing, "Start powering on from point three, switch off every three breaths!"

Although this amount of electricity cannot harm high-level martial artists, and even has virtually no effect on grandmaster-level martial artists, it can still kill ordinary people in this world.

Upon hearing Lu Chen's order, Mo Xing excitedly said:

"Yes, Your Majesty!"

They have witnessed history; the Northern Prince's Mansion will become the first household to use electricity.

As soon as the power was supplied for the first time, all the lights in the Northern Prince's Mansion were turned on.

Upon seeing this, the women gasped in surprise. Not only them, but all the servants, maids, and even the guards in the entire palace were startled by the sudden light.

In an instant, the entire Northern Prince's Mansion became as bright as day.

Although Lu Chen had warned the people in the Prince's Mansion from the beginning that the light bulbs would be shining tonight so they wouldn't be too surprised, hearing about it from others and seeing it with your own eyes are completely different experiences.

They thought these "glass lamps" would be as bright as lanterns at most, but they didn't expect them to be so bright that it made the Northern Prince's Mansion feel no different from daytime.

However, the light quickly disappeared, leaving everyone bewildered.

Xiao Wenyao, standing next to Lu Chen, asked curiously, "Your Highness, why aren't those glass lamps lit? Is there something wrong with them?"

Lu Chen smiled and said, "No problem. I deliberately had people turn off the power. Although these household appliances won't cause too much harm to high-level martial artists, they can still electrocute ordinary people. So, the power needs to be switched on and off three times to prevent anyone from directly touching the wires and getting electrocuted."

Upon hearing Lu Chen's words, the women instantly realized how thoughtful he had been.

Shortly after Lu Chen finished explaining, the lights in the Prince's Mansion came on again, then went out again a moment later. After going out for the third time, the dim lights in the Prince's Mansion never went out again.

Seeing the courtyard illuminated by the glass lamps as if it were daytime, Chu Yuqin couldn't help but exclaim, "I never imagined I would witness such a spectacle in my lifetime!"

Mu Zixuan, standing beside Lu Chen, asked, "Your Highness, will the people of the Northern Kingdom be able to use electricity from now on?"

Lu Chen replied, "Of course, but it will take a long time to manufacture the generator and create the necessary conditions for generating electricity."

"But it is not a problem to bring electricity to the people of the entire northern country, and even the world, within a hundred years."

Upon hearing Lu Chen's answer, the women fell silent. With electricity, the world would become so much better, and nightlife would be so much richer.

Lu Chen said, "Alright, you should all go back and rest. It's already so late."

After hearing Lu Chen's words, the women gradually left Fengyun Courtyard and returned to their own residences.

However, they were destined to have a sleepless night, as the glass lamp had given them such a profound shock.

After all the women had left, Lu Chen looked at Mo Xing not far away and asked, "How long is the lifespan of this light bulb?"

Although the materials used to make the light bulbs have changed, their lifespan is still not good. In addition, since the inside of the light bulb is not a vacuum, the lifespan of these bulbs is still not particularly long.

Mo Xing replied, "Your Highness, the lifespan of these lamps is currently about seven days. However, if the air inside can be removed, the lifespan of these lamps should be able to be extended to several months. The lamps we used in the experiment with the air removed are still lit and show no signs of burning out. However, it is somewhat difficult to make such lamps."

Modern light bulbs are made entirely by hand. To completely remove the air from the glass, the person making the light bulb must be at least a half-step grandmaster, capable of projecting true qi outwards to create such a bulb.

Of course, that's how it is with handmade products. They don't have much experience yet, but once the technology matures and they gain more experience, perhaps ordinary people will also be able to make vacuum light bulbs.

Lu Chen thought for a moment, then said, "Seven days it is, just replace it in time."

This is just a trial run, so there's no need to worry too much about how long the light will stay on.

Lu Chen then said to Mo Xing and the other craftsmen, "Alright, you've all worked hard. Go back and get some rest tonight."

Mo Xing and the other craftsmen said in unison, "Thank you, Your Majesty!"

As soon as he finished speaking, Lu Chen instructed the guards waiting outside the palace to escort the craftsmen back one by one.

at the same time.

Wu Yunwan and Murong Xue'er were sitting in the courtyard, staring in disbelief at the courtyard that was illuminated by the glass lamps as if it were daytime.

The two women had heard that the lamp would be lit tonight, since they had been there when the craftsmen were laying the wires in the yard these past few days. However, neither of them realized that the lamp would be so bright, and that it didn't even need to be lit with candles, which truly amazed them.

Wu Junwan muttered to herself, "How did he do that..." (End of Chapter)