"I have another question." Liu Ji's calm expression disappeared and he looked at Liu Yi with a smile.
"Does your car run on gasoline? If so, could you give me some more? I've heard from travelers from the modern world that gasoline doesn't burn very well."
Gasoline, another similar thing, Liu Yi wrote it down calmly.
"Don't worry about that. Our car uses hydrogen metal batteries, and a single battery can travel 100,000 kilometers."
"Hydrogen metal battery, what is that?"
Liu Yi was about to explain when Liu Ji waved his hand and said, "Forget it, don't tell me. I won't understand even if you tell me."
"Then let's talk about electricity and communications equipment."
"As for electricity, I suggest solar power. Lord Duan and I have learned about your world. Your world is vast and sparsely populated. Large cities are still small, and villages are far apart. The spirit beasts are also very powerful. If you run wires, they will soon be destroyed by the spirit beasts, and running the wires will be useless."
Liu Yi's words made Liu Ji blush quietly. He couldn't let Lord Liu know that Zhao Minggen had never considered the problems of the countryside. As long as the villagers could have enough food to eat, they would kneel down and thank the emperor for his wisdom.
Liu Yi did not notice the change in Liu Ji's expression and continued to introduce Liu Ji.
"Our current Chinese solar photovoltaic panels, combined with interstellar technology, have achieved a 98% utilization rate of the sun (our current conversion rate is around 16%).
A family only needs one solar photovoltaic panel to meet their daily needs for lighting, warmth, cooking, and more. Any unused electricity can be stored for use on cloudy or rainy days.
"How big is the solar photovoltaic panel you are talking about?"
The scene Liu Yi described was so beautiful that Duan Qianyang unconsciously used a respectful title for Liu Yi.
Hearing this, Liu Yi raised his lip corners and replied: "Half a square meter will be enough. If you are worried that it is not enough, one square meter of solar photovoltaic panels is definitely enough."
"What do solar photovoltaic panels look like?"
Liu Yi pulled out pictures of solar photovoltaic panels from his mobile phone and showed them to Liu Ji and Duan Qianyang.
The picture on the phone clearly marked the length, width, and thickness. After looking at it, Liu Ji looked up confused and asked Liu Yi: "Such a small thing can meet the needs of a family for lighting, heating, and cooking."
"Yes," Liu Yi answered affirmatively. Thinking of the fact that people in ancient times basically lived together in clans, Liu Yi reminded: "But the family I am referring to here refers to a family of no more than 10 people."
"Even if it can only meet the needs of a family of four, this solar photovoltaic panel is already amazing. I want this solar-powered one."
Liu Ji agreed without any hesitation. He had talked with time travelers from the modern world before. Not to mention the technical issues of generating electricity, a power station would be enough to stump him.
Solar energy is still simple, and can be done with just a photovoltaic panel.
"The solar photovoltaic panels have a 20-day usage limit. With that 20-day window, we'll definitely meet again."
"Solar photovoltaic panels are easy to install, but indoor lighting requires some knowledge of wiring, which is straightforward and not complicated at all."
When Liu Ji heard that he had to learn something, his eyes rolled around, he took a big step back and grabbed Ah Hai's arm.
"Ahai, it's okay for you to learn this, right?"
Before Ah Hai could answer, he patted Ah Hai on the shoulder and said, "I knew Ah Hai was the most loyal. Go ahead and study. I will definitely reward you handsomely later."
Ah Hai opened his mouth but said nothing. His prince still didn't like to study.
"Hey, I'm going to learn."
Liu Yi watched Liu Ji's actions and smiled without saying anything. It was normal for a young boy not to want to study, but Liu Ji could not escape the fate of studying.
"Enough with the lighting, let's move on to communications. For the same reason that telephones don't work in your world, we've prepared a new type of signal tower for you. It has a very large signal range, covering half of your Tiancheng Continent."
"As long as the signal tower is protected, it can be used forever."
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