The tomb of Mr. Yu is probably the most heavily guarded tomb in the world. There are two armored ships constantly swimming on the sea, and howitzers are mounted on the hilltop. Less than a hundred meters away from Li Xiao, there are more than a dozen mortars scattered

.

Sun Xing also serves as Li Xiao's security guard, and he always wants to visit the Mouse Cave on the mountain.

In the early morning, Xiaoyu went up the mountain to deliver breakfast to her brother. Li Xiao understood what she was thinking, but she just wanted to go up the mountain to see the old man every day. This child had been following the old man since he was a child, and his relationship was not as deep as usual. After the funeral, the stubborn Xiaoyu

I live at the foot of the mountain on Changxing Island, and I come every morning to clean up the old fisherman’s house and bring breakfast to Li Xiao.

If there were no rules for women to observe filial piety, Xiaoyu would probably have gone to the mountains to build a thatched hut and be Li Xiao's neighbor.

"Auntie, the commander is thinking about something inside. I told you not to disturb anyone." Today was a bit special. Xiaoyu walked to the door of the hut but was blocked by Shunzi.

"You're thinking about something, and you don't even see me?" Xiaoyu glanced at Shunzi dissatisfied. This was the first time she was blocked in front of her eldest brother's house.

"Auntie, really, that's what the commander ordered. He said he was tinkering with something important inside, so he issued a special sealing order this morning. Not to mention you, even I can't go in without passing the news." Shunzi was a little agitated.

Afraid of Xiaoyu.

If this girl becomes really unruly, she will be the one who will destroy the world. Not to mention that she can't afford to offend her, even the commander-in-chief can't afford to offend her. Anyone in the world who offends this aunt will definitely be torn apart by his violent brothers.

Broken into pieces, even being a ghost requires playing a jigsaw puzzle.

"I have to go in! Get out of the way!" Sure enough, my aunt's stubborn temper got worse.

"Auntie! Auntie! Don't make things difficult for me, you...!" Shunzi reached out to stop her, Xiaoyu's chest puffed up, and Shunzi was so frightened that she quickly retracted her claws.

"Xiaoyu, don't be ridiculous. Big brother has something to do today. Let's put the breakfast outside for a while and bring the Shunzi in." When the fuss was getting louder, Li Xiao's voice came from inside.

Shunzi felt as if she had been granted amnesty, and felt confident in her heart and chest.

"Brother, what's the matter with you? Why are you still hiding from people?" Xiaoyu shouted through the door.

"Let's work on something new. Leave breakfast at the door and obey me." Li Xiao seemed to be really busy with something, and the sound of glass clashing came from inside.

"Oh!" The elder brother spoke, and Xiaoyu couldn't help but listen. She glared at Shunzi and turned around to sweep the fisherman's tomb.

A statue was just erected in front of Yulao's tomb the day before yesterday. It is a statue made of pure steel and painted with black paint. Xiaoyu has to wipe it with a cloth every day!

The old fisherman on the statue is wearing a coat with his chest bare, holding a wrench in one hand, and wiping sweat with the other hand. Li Xiao would like to kindly remind you that the statues in the square in later generations all have key parts of the upper and lower bodies covered with iron.

It's shiny to the touch.

But after thinking about it for a moment, Li Xiao didn't say anything. If he did this to this statue on Changxing Island, his disciples and grandsons would definitely cut it into pieces and then throw it into the sea to feed the sharks. Not even the dregs would be left behind.

Picking off a leaf that fell on the shoulder of the statue, Xiaoyu smiled at the old fisherman.

Li Xiao didn't have time to care about these things. He was busy working in the hut. He couldn't be idle this month, he had to tinker with something new.

Carefully put a two-inch long wooden tube into the melted wax. After the wooden tube is wrapped with wax oil, carefully pinch it out with tweezers and put it away. While the wooden tube is not completely cool, quickly wrap it with oil paper, and then wrap it with oil paper.

A wooden tube wrapped with oil paper is put into wax and then coated with wax.

After finally completing this process, I checked that the seal was pretty good. Without plastic, I had to make do with this thing.

Find two thin zinc plates and cut them into two circles against the wooden pipe. One of the circles is firmly glued to the bottom of the wooden pipe.

Drill a hole in the middle of another zinc plate and insert the polished carbon rod into it.

Carefully mix manganese dioxide and graphite together, and put the two things inside a mesh made of fine linen. The mesh has long been brushed with ammonium chloride solution and starch from potatoes.

.

After it is done, put it into a wooden tube with a zinc plate bottom. Li Xiao carefully pours in a little gelatin. Stir it carefully with a small wooden stick for a few times. The manganese dioxide and graphite gelatin are mixed into a ball, forming a sticky paste.

Paste.

Then insert the carbon rod in the middle and glue the zinc plate with holes to cover it.

Li Xiao breathed a sigh of relief, and now it's time to test whether it was successful.

I found two wires, one was glued to the zinc plate at the bottom, and the other was glued to the head of the carbon rod. The small light bulb connected in the middle of the wires suddenly lit up.

"Hahaha! Success!" Li Xiao looked at the world's first battery excitedly.

The reason why the wax dipping process is required is because there is no plastic. When the battery gets wet, it will significantly affect the battery life and quality. Li Xiao does not want his soldiers to run out of power after using it!

Ming Dynasty already has primary refineries that can refine gasoline, diesel and kerosene. But the chemical industry is basically zero. The reason is... Li Xiao doesn't know how to make plastic.

Materials science is a basic subject, and it requires the joint efforts of many generations to see benefits. The current level of science and technology in the Ming Dynasty is entirely the result of Li Xiao’s efforts to pull out the seedlings. Once the sapling exceeds the height of the person who pulled it out, it will be difficult to pull it out again.

.

The small light bulb stayed on for ten hours and twenty-five minutes without blinking. Although the quality was not very good, it was just okay. I had no choice but to make the gadgets I made by myself. Maybe after passing by the Xu family

Brother's hand can be improved a bit, but I'm at this level anyway.

After tinkering with the battery, Li Xiao thought carefully about what a single-unit telephone was. Li Xiao had been exposed to a single-unit wired telephone when he was a recruit. At that time, he was still a communications soldier, carrying a wired roller back and forth all day long. His physical fitness was that

The foundation was laid during that time.

Fortunately, this is Changxing Island. Li Xiao ordered to go down, and the Yu Lao's men quickly found all the materials. According to the appearance of the field phone in his memory, Li Xiao assembled it exactly the same.

A standard old-fashioned telephone, the microphone and receiver are still separate. There is no dialing button, so you need to pick up the phone number you want.

The ringing ring was forged by Mr. Yu's apprentice himself. The sound is clear, loud and pleasant to the ear, but whose phone ring is made of silver. There will be more and more telephones in the future. How much money will it cost? You are a prodigal who can't live a good life.

He kicked this gangster hard and didn't tell him the reason, so he figured it out on his own. Li Xiao was very worried that these gangsters would harm his own money. It seemed that the scientific research department would have to manage its money well in the future.

Hmm! You need someone to take a good look at it.

He asked Shunzi to lay the line all the way to the villa at the foot of the mountain, and he rang the bell himself in the hut. He picked up the receiver and put it to his ear. After a while, he heard Xiaoyu's trembling voice: "Who are you?"

Li Xiao was obviously a little uncomfortable without the habitual "Hello" of later generations: "I am your eldest brother, how can I hear my voice clearly?"

"Oh my god!" Then there was the sound of the microphone falling to the ground.

"Commander!" Shunzi's voice came from the receiver.

"How is Xiaoyu?" Li Xiao quickly asked Xiaoyu what was going on.

"My aunt was scared away...!" Shunzi said in a very helpless tone.

"Give it to me." Sister Qiao's voice sounded again from the receiver, her tone full of excitement.

"Sister Qiao, how is the voice? Can you hear it clearly?"

"Oh my god! I can really hear the sound. I'm so unlucky! Brother Xiao, you can hear it clearly, very clearly. I can even hear the birds chirping over there clearly!"

"Birds calling?" Li Xiao looked around, but there were no birds! His stomach growled unsatisfactorily at this time, holy shit!

Only then did Li Xiao remember that he had still not made any progress since last night.

"As long as it's clear, Sister Qiao, give the phone to Shunzi. Shunzi! Call the Xu brothers over. I have something to tell you."

"promise!"

Li Xiao can still play with wired phones, but if he plays with wireless phones, Li Xiao won't be able to do that. But at least the radio needs to be invented. Morse code is already very mature in the Ming Dynasty. As long as the radio is tinkered with, Li Xiao can immediately

Stay on top of the latest situation across the country.

If the telegrams are forwarded, it is not difficult to know what is happening on the front line of Ceylon. In fact, the navy is most in need of wireless communication. Nowadays, communications between navy ships still rely on lights.

Light signals can expose targets at night, but are sometimes less obvious during the day. Moreover, the information they convey is very limited. If you want to convey more complicated things, you can only use semaphores. But semaphores cannot be used at night.

Having a radio is much easier. No matter what kind of sea conditions and weather, you can use radio to communicate. As long as different code books are used, confidentiality is not a problem.

This is what the Ming Dynasty does now. It is extremely difficult for people without a code book to unlock the secrets inside. In these days, there are no mathematicians like Turing.

But this kind of thing can only be done by the Xu brothers. When Mr. Yu was here, the two brothers were the ones who tinkered with electrical appliances. The last time Li Xiao saw them, these two guys had already started researching

diode.

It was worth a thousand dollars to ask Li Xiu to go to Jiangxi and invite these two people from Xu Guangqi's family.

Shunzi was always quick to deliver news, and the Xu brothers quickly arrived at Li Xiao's hut. After the funeral, the two did not leave at all. According to etiquette, they, the younger generation, had to burn the first seven before leaving.

But there was a guy standing behind them. He looked about sixteen or seventeen years old and looked like a servant. This made Li Xiao a little strange. Anyone who knows the rules knows that you can't lead all kinds of people to Li Xiao. Let's talk about meeting Li Xiao.

Xiao also needs to bring Chang Sui with him, which is quite a big deal.

"Who is this person?" Li Xiao glanced at Xu Ermo dissatisfied.

"In response to the commander-in-chief, this is the talent our brothers are going to recommend to the commander-in-chief." Xu Ermo has become good at speaking Mandarin in the past two years, and his mouth is no longer the kind of Jiangxi dialect that has to be repeated several times and requires translation.

"Talent?" Li Xiao liked hearing these two words the most, and he immediately became interested.

"Yes! He is a talented person. You will know it if you look at the firearms he made, Marshal."

"Gun? Bring it here and take a look." Li Xiao ordered, and the boy who looked like a servant immediately ran out, came in with a cloth bag, opened the bag and held it to Li Xiao with both hands.

As soon as this gun came into Li Xiao's hands, Li Xiao was really surprised. This...how does this thing look like the famous MG-34? I remember that I had thought about equipping this famous general-purpose machine gun before, but in the end it was because of the craftsmanship and

I gave up because of the materials. How did this guy come up with it? Could it be that he stole my drawings?

The general purpose machine gun means that this thing can be used as a heavy machine gun or a light machine gun.

The thing in front of me, with a barrel full of heat dissipation holes, a magazine feed, and a front-mounted tripod, is so similar, so similar.

"How to use this thing?" Li Xiao pretended not to understand.

"Big...! Handsome!" This little guy was obviously nervous and stuttered a bit.

"Don't be afraid. Since you made it yourself, you can do it yourself. This can be considered a test for you. If you can't even understand your words when I see Shangguan from now on, how can I trust you and use you?" Li Xiao stretched out his hand to stop him.
To be continued...