Yang Dejin took Li Zichou to walk along the outer wall of the palace. After walking for a while, he saw the familiar gate of the palace.

"Oh, by the way, I went to eat with Ji Zhuilu this morning." Yang Dejin said as he walked.

"Captain Ji, what did you talk about?"

Yang Dejin was leading Li Zishou into the bustling area around the capital: "He's talking nonsense, just talking awkwardly."

Li Zichou: "Then what's your reaction?"

"Let's chat with him, I think I should pay attention to the city defense department."

"Then you can get close to him more, but be careful that your identity as a girl won't be discovered."

"Ah, ah, ah."

Li Zichou was still a little worried, Yang Dejin said that she was worried like a mother character, Li Zichou smiled and cursed.

"Speaking of which, where are you taking me?"

"Hey!" Yang Dejin said mysteriously, "Today I will take you to visit some of the most interesting places in the capital."

Li Zichou had no choice but to nod suspiciously: "Hey..."

So the whole afternoon, the two of them went to see the Zaju performance with the highest ticket price in Linjing. Watching other people playing polo, two people who had just started riding horses looked at each other and decided not to overextend themselves and compete with others. I ate at the small but very popular Xiaolongbao shop in Xishi, and went to a few Hu merchants in the capital to find some weird goods.

In one day, what they saw was only the tip of the iceberg in Linjing.

Yang Dejin bought a lot of miscellaneous things, including but not limited to wood, spices, fur and so on.

Li Zichou was confused and asked her why she bought those things?

Yang Dejin said that he would buy it if he liked it, and keep it for making raw materials. What if one day he invents and creates it himself and uses it?

When she said this, she suddenly thought of something. Seeing that it was getting late, she hurriedly took her to the Prince's Mansion.

Yang Dejin: "Zifu, I have two big treasures to show you."

Li Zishou: "I have to go back to the palace."

Yang Dejin suddenly became forceful: "Stop talking nonsense, and Bai Qingyang will not chase after you when you return to the palace later to question the teacher. Don't look at it and regret it."

Li Zichou: Bai Qingyang is now at Xie Zhi's house...

//

Today was supposed to be Xiu Mu, but Xie Zhi went to the Ministry of Criminal Justice to look at some cases at noon.

There are no people in the public office of the Ministry of punishment, only a few small officials on duty.

What she didn't know was that the stake she stayed by Yang Dejin's side was blocked by the people from the Prince's Mansion, and she had no chance to tell her about Qu Jiangye.

Zhang Keji was also investigating the case at Qujiang Pavilion with other people from the Ministry of Criminal Justice. He hasn’t returned since the banquet last night. The empress has issued a death order and said no rumors are allowed, so basically no one can tell her the news. No one dragged her to work overtime.

She thought that other officials were on vacation, so she read some cases by herself, and did not leave the office of the Ministry of Punishment until the time when the office was usually released.

On the way, Xie Zhi kept his head down slightly, thinking about things while walking.

Now Bai Qingyang is temporarily staying in her own mansion. After the brief reunion, she will return to the palace by tomorrow night at the latest.

Because there will be a trip to the lake by Jinshi the day after tomorrow, as a queen, she must not be absent, but Mrs. Bai has seen Bai Qingyang this time, and she does not know when the next time will be. After Bai Qingyang becomes the emperor, they will be able to see each other every day.

I don't know if there is any problem with the Empress, did Li Chou really not find out that Bai Qingyang went out of the palace secretly?

Prince Yu is really supernatural, he can even cover the view of the Empress, Xie Zhi is becoming more and more curious about Yang Dejin's abilities.

Now there are secret guards guarding the Prince's Mansion on the outside of my house, and there are guards raised by myself inside, but whenever a fly enters, they will know.

Yang Dejin should have attached great importance to the matter of Bai Qingyang leaving the palace, otherwise he would not have sent so many people to secretly protect him, but what surprised Xie Zhi was that Yang Dejin had never come to him even after this day had passed, so he was so relieved ?

Thinking about it, Xie Zhi looked up at the sky, and happened to catch a glimpse of two young people passing by in a hurry at the intersection of the street.

Xie Zhi felt that she must have seen a ghost, otherwise how could she have seen a man who looked exactly like Yang Dejin walking down the street in women's attire?

Next to him was a man.

Yang Dejin forgot one thing - the Prince's Mansion is only about ten minutes away from Xie Zhi's house, if she and Xie Zhi both go back to their respective homes, then the chances of meeting them on the road are actually very high.

Li Zifu canceled today's Xiu Mu, but Xie Zhi who left early last night did not know what happened last night.

So Yang Dejin never expected that she would take the initiative to work overtime, and then happened to go home at this time.

Xie Zhi was puzzled, stopped at the intersection, and watched the two people turn into the street leading to the Prince's Mansion.

That person was very different from the Yang Dejin in her impression, she was talking about the Yang Dejin she came into contact with after going back.

Different from the silent and cold look of the idiot prince before, this Prince Yu is more friendly and cheerful.

But just now, the woman who looked a little like Yang Dejin was wearing a white dress with a stand-up collar and a slanted front, with hairpins in her hair. Her long hair was like a waterfall, and it was a bit of a feminine softness.

Xie Zhi stood there for quite a while, staring fixedly at the intersection where the two had long since disappeared, and then slowly walked away.

Maybe, I misread it...

It's just that that person is indeed Yang Dejin.

She dragged Li Zifu back to her prince's mansion in a hurry, not knowing that she had been witnessed by someone.

Fortunately, Xie Zhi's attention was all on Yang Dejin, and he didn't pay attention to Li Zichou who was blocked on the other side.

Li Zichou was wearing men's regular clothes, which were completely incomparable with those flamboyant dragon robes in the palace. People who didn't know her would think she was a young gentleman from a better family.

In Xie Zhi's view, it was just a woman who looked like Yang Dejin and an ordinary man hurrying on their way.

Li Zichou was dragged all the way to the back mountain of the Prince's Mansion, where it was a bit like the Imperial Garden, with a large lawn and colorful flowers and trees.

The grass behind the Prince's Mansion is covered with a small hill, and in the middle of the hill is a long-lived cherry tree with a thick trunk, which looks old at first glance.

At this time, the cherry blossoms are almost in bloom, and only a layer of fallen flowers is spread under the trees.

Yang Dejin was a little regretful. When she first wore it, the pink cherry blossom trees were really romantic, but it was a pity that Li Zichou didn't see it.

But she thought about it again, this person is always the queen of the whole country, not bad for her cherry tree.

"It's almost done. What exactly do you want to show me?" Li Zichou accompanied her from the East City to the Prince's Mansion, and then from the main house of the Prince's Mansion to the back mountain of the Prince's Mansion.

I don't know what is so mysterious.

Only then did Yang Dejin open the box that she had just brought out of her room, and took out a crossbow from inside.

"Look at your reward." Yang Dejin excitedly adjusted the crossbow and took out another short arrow.

"Hey, hey, don't point at me, be careful of fire." Li Zichou was afraid when he saw the tip of the crossbow arrow pointing at him.

Seeing Yang Dejin quickly point the crossbow in another direction, Li Zichou asked, "What's wrong with this crossbow?"

"This is a small crossbow I cut out myself." Yang Dejin proudly fiddled with the thing in his hand.

"Really, did you do it yourself?" Li Zichou was surprised, "The hands-on ability is quite strong."

"Hmph, didn't I go to the palace last time to see you practicing arrows? I just thought that bows and arrows are not as useful as crossbows. After returning to the Prince's Mansion, I thought about making one, and I wasted a lot of wood!"

Li Zishou was very affirmed of her creative spirit, but she still shook her head regretfully: "Good job, but Dasheng already has a bigger crossbow, you little toy, pass."

"Hey, don't pass, do you think I don't know that Dasheng has a crossbow?" Yang Dejin quickly explained, "Dasheng's large crossbow is indeed amazingly powerful, but it is expensive to make, low in output, and heavy. It is suitable for defense, not for the army. Rush and fight."

"Didn't you mention Shuobei's going south next year before? I see that you are worried about how to improve the combat effectiveness of Dasheng's army, and you just want to help improve the weapons.

"I can use this.

"This is not a small toy. I specially made this crossbow bolt into an individual crossbow of this size, which can be equipped on a large scale."

Li Zichou blinked, feeling that what she said was quite reasonable.

At present, the main weapons used by the Dasheng army are long knives, halberds, bows and arrows, and the only crossbows are large crossbows for defending the city.

If an army can be equipped with a single crossbow, wouldn't that mean that long-range combat is more powerful? !

"Moreover, I think soldiers need a lot of strength to open their bows, otherwise the strength and range will not meet the requirements." Yang Dejin continued, "My crossbow uses wooden barbs to realize automatic gear shifting, and it also serves as a sight. It is easier to use than ordinary bows and arrows, and even women can easily control them."

Yang Dejin found a stone lamppost in the distance, and raised it to aim at the candlelight inside.

With a sound of "嗖", the faint fire light went out in response.

Li Zichou was really a little shocked: "This is too awesome, so far away?"

Yang Dejin put down the crossbow, scratched his head and said, "Hey, it's actually far worse than the range of a bow and arrow. After all, I'm not a professional carpenter, so I can only make it portable and usable at best."

"No, no, no, you are already very good. I think I can equip them on a large scale. Then find some carpenters in the Ministry of Engineering to discuss the optimization space of your single crossbow."

Yang Dejin was also very happy to see Li Zishou finally moved.

In the past few days, she made a lot of failed products before she could find wood and bowstrings with suitable hardness, which also caused a lot of new injuries to her hands.

"Dejin, it's too strong. Come on, make an RPG someday." Li Zifu patted her shoulder seriously.

Yang Dejin: ...For RPG...with the current productivity...it's still a little bit reluctant...

Of course Li Zichou also knew that this dynasty could not make hot weapons, it was just a joke.

But Yang Dejin said that she has one thing that she doesn't know if it is a hot weapon.

Li Zifu saw her take out a narrow-mouthed vase from the box at hand again. The forearm was thick and thin, and it really didn't look like a hot weapon.

Li Zichou was puzzled, and saw Yang Dejin holding the bottleneck and throwing it towards a big exposed rock far away from the hill.

The violent impact cracked the ceramic vase, and the alcohol mixture inside burst into a large flame, burning the rock.

Not exactly a hot weapon, but hot enough.

Li Zichou couldn't help but burst out the beautiful C language: "Fuck! Mostov cocktail!"

"That's right!"

The Mostov cocktail, also known as Molotov cocktail, was first used to smash tanks.

Molotov cocktails are divided into two types with and without leads. Those with leads need to be ignited by an open flame before they can be broken and explode.

In this dynasty, it is unrealistic to carry open flames and lighters with you. At most, you can use matches or flints.

Yang Dejin thought that was too troublesome, so he tried to make a leadless model that can explode when it is broken without igniting it.

But it took her a lot of work, because the most important thing to make this kind of incendiary bottle is saltpeter powder, and the supply of shops in the capital is not much.

For this reason, Yang Dejin often went to the toilet in the hut, where saltpeter is most likely to be produced on the ground. If Li Zichou found out, she would definitely want to stuff her head into the toilet.

Yang Dejin didn't plan to take it out at the beginning, because saltpeter was hard to find, which determined that the cost of making this thing was high.

With the technology of this era, it is impossible to fractionate gasoline from petroleum, and the cocktail is less flavorful, so it can only be replaced by secondary materials, which determines that this thing is less powerful.

So Molotov cocktails are actually not suitable for mass production.

After Yang Dejin told Li Zichou about these disadvantages, Li Zichou didn't think so.

No matter how small the power of the Molotov cocktail is, it is also an advanced military product.

Large-scale production is definitely not possible, but she can be produced on a small scale and applied to future wars to create a little surprise for the enemy.

Li Zichou decided that in two days, she would show these two items to the Armory Supervisor, and after improvement, they would send them directly to the Ordnance Institute, so that they could work hard to build them.

The author has something to say:

Li Zichou: But I still want to know, how can ordinary citizens remember what to do with Molotov cocktails?

Yang Dejin: Well... Didn't there always be demonstrations and riots in a certain place two years ago? Many people made Molotov cocktails by themselves. I was curious and went to check...

Li Zichou (breathing in: ... is this okay to say?

Both crossbow arrows and Molotov cocktails will be banned. A Jiang, you are almost done. If you have nothing to do, you can find a factory to work.