After the meal, everyone went back to their own places.
Li Yi was copying a medical book and learning as he copied.
Pei Yaoqing was also sitting in front of the desk, thinking about something and taking notes from time to time.
Li Chengqi was fiddling with the light bulb and the pedal generator. He found that the light bulb was not so bright when he did not exert force and the speed was slow.
As he gradually sped up and slowed down, the brightness of the light bulb decreased together. When he exerted a lot of force, the light bulb remained the same.
"What's the reason for this?" Li Chengqi wanted to figure out the principle between speed and the brightness of the light bulb.
Then, looking from the outside, the window of the house he was in flashed non-stop, which was a little scary.
In the house next to Li Longji's courtyard, someone was pedaling a bicycle, which was connected to Li Longji's study.
The palace sent him the memorials submitted to the political affairs hall today. Gao Lishi approved the simple ones and sent the ones he could not make up his mind to Zhuangzi.
Li Longji enjoyed the benefits of the electric light bulb, and the people in the house next to him had to rotate.
"It's better than candles." Li Longji found that the light hanging in front of him did not sway and was always so bright.
Empress Wang could not sleep, so she strolled slowly in the house and chatted with Taohong.
There was also a light bulb in her bedroom. It was covered with a red gauze frame, and the light it emitted was warm.
"Taohong, what do you think will happen if the rich people use this light?" Empress Wang looked up and avoided the light.
"Some people will be punished by pedaling. If they can't pedal and the light doesn't shine, they will be beaten." Taohong saw the people pedaling in the house outside.
Zhuangzi installed cast iron gears and chains. There was a chair to sit on, so the people pedaling were not very fast.
If it were other people, they would not bear to use good iron to make gears. According to Dongzhu, the gears could not be used after a few turns.
Empress Wang was originally full of light, but when she heard Taohong's words, she rolled her eyes. "It's not like I'm asking you to pedal. Will the people in the world feel bad?"
"Isn't it the same in the palace?" Taohong pouted.
"Don't be afraid. Let's see what uncle will do. The windmill turns and doesn't turn. He can't let the villagers pedal all day long."
Empress Wang didn't seem to be in a hurry at all as she waited.
Zhuangzi came up with a new idea and brought it back to the palace.
As for now … he continued to let people kick him.
"Tomorrow, bring the things back and send a set to Hundred Blessings Palace. As for the others …" Empress Wang stopped.
"I heard that there are a few people in the palace who are complaining," Taohong revealed.
"Third Young Master is with me, so of course they won't do it. Zhao Li Fei's son, Li Ying, almost became the Crown Prince. That was close."
Empress Wang was unhappy when she said this.
There were too many women. There were all kinds of concubines, Zhao Yi, Jie Yu, and Cairen.
"Your Majesty, you have to come to Zhuangzi every few days. Only when you come to Zhuangzi will His Majesty not bring anyone else, unless he's sick and the imperial physicians can't cure him."
Taohong suggested.
"You won't bring anyone else?" Empress Wang wasn't sure.
"Dongzhu said that a wife who has gone through hardships will not leave the court. If His Majesty brings another woman, Dongzhu will definitely not give her a good face," Taohong analyzed.
"Good, Uncle is a good person." Empress Wang gave out a card. As long as he could stabilize her position, he was a good person.
***
The good person Li Yi copied very seriously. He checked every page he copied and didn't dare to make any mistakes.
After writing for two hours, Li Yi stopped. He would copy this today.
He looked up at the light bulb. The farmer insisted on coming over to generate electricity. Li Yi tried to stop him, but he didn't succeed, so he let the farmer exercise there.
"Wind power and hydroelectric power can't be combined into a unit, so the current and voltage are unstable.
Hydroelectric power is not a problem under supersaturated conditions, but there aren't rivers everywhere.
There's lead, and it's very pure. There's also green alum oil. Yes, it's dilute sulfuric acid. "
Li Yi thought of lead-acid batteries. Lead was already available, and its purity was very high.
As for dilute sulfuric acid, he had to admire the alchemists. They refined all kinds of things, added things, and then took it out for people to eat. There were a lot of heavy metals.
"After the New Year. It's cold and there's a lot of work to do. I can't handle it." Li Yi muttered and shouted outside, "I'm going to sleep."
"Dongzhu, I'm going back." Swoosh. Accompanied by the sound, the light went out.
The next morning, everyone left in a hubbub after they had finished eating.
Li Longji brought three sets of human-powered generators and a big box of light bulbs. The light bulbs were not portable and there was no tungsten wire.
Li Yi brought five sets, saying that he would help Brother Yi test them. Li Yi expressed that he didn't believe him.
Pei Yaoqing took a set. He wanted to promote it and let the rich people see it first, then he would make it himself.
He took free light bulbs from Li Yi. After the New Year, he would have to pay if he wanted to use light bulbs again.
As they left, the ice skaters came. The people who stayed in the Zhang Family's village last night were the most convenient.
"Li Dongzhu, show me the one where you jump and spin. I think I can do it if I see it." Someone shouted to Li Yi.
"I can't." Li Yi felt uncomfortable in his right ankle when he heard about jumping and spinning, so he firmly refused.
He turned back to take a walk to digest the food and then went to teach the students for half a day.
As soon as Li Longji went back, he was entangled by the three prime ministers.
The morning court had not been held yet, so Yao Chong was in charge of everything that needed to be discussed with the officials and departments.
"What did Your Majesty bring back today?" Yao Chong didn't mention official business and asked curiously.
"Uh …" Li Longji was in a dilemma. He didn't bring enough. The Political Affairs Hall should have a set.
"It's something similar to a candle. I'll use it for you first and give it to the Political Affairs Hall if it's useful." Li Longji found an excuse.
The three prime ministers looked at each other and felt very sad.
"Your Majesty, the marriage between the Turks …" Yao Chong said.
"No. In the future, if anyone wants to marry into the Tang dynasty, only the daughter of an outsider is allowed to enter the Tang dynasty. Tang daughters are not allowed to marry outside." Li Longji gave the answer.
"Why?" Yao Chong asked.
"The mountain is high and the road is long. It's difficult to meet. I don't want the princess to suffer outside." Li Longji looked like a good father.
The three prime ministers looked at each other again. How could there be such a reason? Your Majesty, the princess you promised to someone else wasn't yours, right?
In the past, Princess Wencheng was a distant relative.
Princess Jincheng in Tubo was Li Shouli's daughter.
You don't want to give up someone else's daughter? Oh my god!
Li Longji didn't want to explain. He said to the three, "Regardless of whether it's a private market or not, no one is allowed to bring Tang dynasty tools out of the border markets with Tubo and Turks. All craftsmen are not allowed to bring them out.
Good technology should be left in the Tang dynasty. If we can stop them, we should stop them. If we let them learn it, won't they have the money to fight us? "
When the prime ministers heard this, they instantly understood why they didn't marry outside. Every time they married a princess, they had to bring craftsmen and technology.
"We understand." Yao Chong agreed.
He was narrow-minded to begin with. He also felt uncomfortable giving away good things.
On the other side, Empress Wang went to Baifu Palace to deliver a set of things.
There were three sets. One set was with her, one set was in His Majesty's office, and the last set was for the retired emperor.
Others didn't have it. Even the favored Wu Jieyu, who was good at singing and dancing, didn't need it.
As soon as Empress Wang arrived at Baifu Palace with a large group of people, Noble Consort Lu took her hand and asked her to sit down and talk.
"Empress, you can't walk too fast in the palace. Be careful of your body." Noble Consort Lu glanced at Empress Wang's belly and said.
"I know. I was in a hurry to send you good things today. Now they all know, right?"
Empress Wang was asking about her pregnancy. No matter how hard she tried to hide it, she couldn't hide it forever.
"I don't know if it's a boy or a girl." Noble Consort Lu told Empress Wang. Others could only guess.
"I don't eat the food in the palace. I don't drink any medicine. I'm not afraid." Empress Wang said casually.
Noble Consort Lu was slightly relieved. She heard from her man that Zhuangzi's Li Yi's medical skills were top-notch.
She knew that she could only be at ease if Empress Wang's position was stable. At the same time, Li Dan was also safe.
Noble Consort Lu didn't know the history, but she could feel it.
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