Haitang said: "Your Highness, my father is 49 years old, and there are still many old injuries on his body, I am really worried about him." ”

Li Su held her hand and said, "Haitang, you don't have to worry about him, now that he doesn't need to charge into battle in person, there will be no danger."

Father-in-law, he was a standard soldier, doing some civilian work in the imperial court, and he felt depressed. This person, when you get older, it is most important to maintain a good attitude.

Fighting a war is a very difficult thing for others, but for my father-in-law, it is to relax. ”

Haitang nodded and said, "The concubine also knows this, but she is a little worried about him." ”

Li Su said: "In this way, I asked the General Staff to send him more artillery and musketeers, and send him more good doctors to serve him."

Let Du He send him a battalion of the Flying Tigers to protect his safety, so be it. ”

Seeing that he thought so thoughtfully about his father, Haitang also put his mind at ease, and said movingly: "The concubine thanked you for my father." ”

In the following days, it was uneventful, and Li Su focused on scientific research.

The world's first electric lamp the size of a plowshare was successfully trial-produced by American scientist Thomas Edison on October 21, 1879.

In the process of development, Edison carefully analyzed the gas and arc lamps of the time, and his main direction was to find a heat-resistant material. The electric current burns it to the point of white-hot and emits a blazing light without breaking or melting. He stumbled upon the cotton thread burning to ashes in the air, and the carbon cotton thread glowing when placed inside the treated glass ball. Unfortunately, the light only lasted a few minutes before it faded. He mistakenly abandoned the experiment and tried 1,600 different heat-resistant materials, including cesium, nickel, platinum (platinum) and platinum-iridium alloys, with little success.

Edison returned to the study of carbon. In October of that year, he experimented with a 20-centimeter-long, 0.15-centimeter-diameter carbon rod that could withstand heat for 5.5 hours, and he continued to improve the carbonization method and air extraction treatment.

On October 21, 1879, he used a carbonized cotton thread with a diameter of 0.025 cm as a filament, and the light emitted was bright and stable, and it was illuminated by 4 candles for 1 hour, 2 hours...... It was lit up for 45 hours, after more than 1 year of hard work, thousands of tests. The long-awaited electric light has finally been born.

Li Yu first made a chemical battery, and then made a light bulb according to Edison's method of making a light bulb.

On this day, Li Su suddenly had a childlike idea to see everyone's expressions when they saw the electric light for the first time.

That night, Li Su's wives and concubines were invited into the restaurant, and Zhuge Jun ordered someone to extinguish the palace lights in the room, and it was suddenly dark.

Everyone thought he was going to have some candlelight dinner, and they were looking forward to the upcoming romance.

Wu Cong's eyes were sharp, and she found that something was wrong, so she asked, "Big brother, you haven't prepared the candle yet, why did you put out the light first?" ”

Li Su said: "Don't worry, you will understand immediately." ”

Li Su plugged the bulb into the power supply. Suddenly, the room was filled with light. The women were stunned, and the room was silent, and everyone gathered around and stared at the light bulb in a daze.

Li Ning'er broke the silence first, and she said in surprise: "Brother Liang Wang, what is this?" Can it be lit without ignition? ”

As he spoke, he reached out and touched the bulb.

At this time, the light bulb had just been lit up, and it had not yet heated up, and everyone couldn't help but go up and touch it, and they all felt very strange.

Li Su gave them a brief explanation of the principle of electricity, and used lightning to illuminate as an analogy. He also said that in the future, all electric lights will be used for lighting.

Qibi Wuyun exclaimed: "Husband, you are too powerful. ”

Li Ning'er was more direct, jumped up and hugged Li Su, couldn't help but kiss him on the face, and said, "Brother Liang Wang, you are amazing." ”

Seeing that Li Ning'er took advantage of Li Su, the other women stopped doing it. They all came up to kiss Li Su.

Li Su hugged left and right, very comfortable.

Li Su sorted out the relevant information on electricity and handed it over to the Ministry of Science and Technology to study electric power, and soon made progress.

Soon, electric lighting was the first to be implemented in the palace.

The means of transportation in the Tang Dynasty were mainly horseback riding and carriage riding, which were greatly influenced in the city.

On the one hand, there is danger, the horse is easily frightened, causing the horse to start, and it is difficult to control. On the other hand, there is pollution. Although people used dung bags, it was inevitable that some of them would fall out. Even if you use a dung bag, the smell cannot be solved.

In order to solve this problem, Li Su remembered the bicycle, which is a green means of transportation.

In terms of bicycle manufacturing technology, it can be done with the current industrial level of Datang. But there is a difficulty, that is, the bearing.

In order to improve production efficiency, Zhuge Jun instructed engineers to open many single-function lathes, and used assembly lines to carry out steel cutting, grinding and other processing processes. With the guarantee of these technologies, the manufacture of ball bearings has also become a reality.

Before the Tang Dynasty, wooden and iron bearings were directly rigidly rubbed, unable to withstand rapid operation, and were seriously worn out, and often needed to be repaired and replaced.

When Li Su drew the drawings of the ball bearings and handed them to the engineers, they were extremely amazed by the emperor's ingenuity. This solves the problem of wear and tear of the original bearing, and improves the efficiency of bearing operation.

East Palace.

On this day, Huang Qi and Li Dan came over with a bicycle.

Everyone was curious and gathered around to watch. But everyone looked at the monster on these two wheels in a daze, wondering how it could run.

Yang Kang couldn't let the emperor try this new thing, he had to go up and try it first to see if there was any danger.

Yang Kang pushed the bicycle, not knowing how to start, and then he sat on the seat and pushed forward, but after a few steps, he fell to the ground, causing everyone to laugh.

Li Su deliberately looked at his joke before he came up to show himself.

He got on his bike and ran as fast as he could, looking at everyone's eyes.

Li Su proudly showed off his riding skills, threw his hands wildly, and rode forward as usual, leaving people dumbfounded.

Li Su stopped and said to the dark clouds: "Queen, come, I'll take you." ”

Although she was a little scared, she trusted Li Su very much, so she sat on the back seat of the bicycle, wrapped her hands around his waist, and recently took her to run.

The clouds were very happy, giggling and chuckling.

The other women were also clamoring to sit, and Li Su had no choice but to fulfill their wishes one by one.

Bicycles quickly became popular in Datang and were exported overseas.