Nitroglycerin is too dangerous, and even if it is manufactured with the current technology of the metropolis, it is equivalent to doing an explosion test.

On the contrary, the stability and "sex" of black fire 'medicine' is better, and it can be mass-produced after the wisdom test of the working people in ancient times.

Liu Ye has already thought about it, since he wants to make *** by himself, then there must also be a gunpowder factory, at least there must be a gunpowder workshop, otherwise *** will not be able to play a role at all.

This recipe sounds simple, but it is not so easy to achieve a complete 'fine' ratio, because this 1:2:3 recipe does not refer to the mass ratio, but to the molar ratio.

Molar measurements require specialized instruments and a series of density and volume calculations to be obtained.

Fortunately, these 'fine' and dense measuring instruments can be found in the gluttonous warships, although they cannot be brought out, but Liu Ye can imitate them and 'hand' them over to other people.

Of course, this also involves the manufacture of glass, which happens to give rise to a new profession.

After mixing alkali and sand, it can be burned at high temperature to obtain a beautiful and transparent liquid, which is cooled to become glass.

Before the capture of Haiwei City, it was really not easy to 'get' alkali, but most of the dregs left after the salt-making process were alkali, especially the saline-alkali land, which was full of alkali blocks.

Sand is better to find, just dig it up.

Liu Ye immediately ordered someone to take the alkali block stored in Haiwei City, he fused the glass and sand, and after heating it at high temperature, a liquid-like thing was formed.

"What is this?" The surrounding citygoers had already gathered aside, and when they saw that Liu Ye had made a new move, they rushed to see what new things had appeared.

Pour this liquid into the mold, and after a period of natural cooling, Liu Ye took out the cooled things and gently rubbed them with sand.

In the dim sunlight, a shiny test tube appeared in front of everyone's eyes.

"It's beautiful!" The citizens let out a cry of amazement.

The capital city is not without glass, but those things have long been dirty and broken after hundreds of years of destruction, how can there be this test tube made in front of Liu Ye's eyes is beautiful 'tempting'.

Especially the 'female' person, who has always had no immunity to shiny things, and her eyes are straight when she sees this thing.

"Alas! I really can't do this! The people around him praised him, but Liu Ye sighed in his heart.

Although the test tube in front of him was shiny, Liu Ye had already seen that this test tube was actually not qualified, and the tube body that should have been straight had a slight arc, which would cause a difference in measurement.

Liu Ye stood up, casually threw the test tube on the ground, and fell into a shattered scum. The citizens of the city exclaimed in surprise, and their eyes showed pity for this test tube.

"Do any of you want to learn this manufacturing technique?" After looking around for a week, Liu Ye asked.

Everyone was stunned, and some couldn't believe Liu Ye's words.

"City Lord, are you saying that we can make such a beautiful thing?" A timid voice came from the crowd, a little girl about thirteen or fourteen years old, asking questions, and the light in her eyes made no secret of her love for glass.

"Pretty?" Liu Ye looked at the test tube that was broken into pieces and smiled, the test tube may be beautiful in the eyes of the city people, but it is an unqualified product in Liu Ye's eyes.

The inner wall of this test tube has many slight protrusions, and the color is uneven, so it is not good-looking.

"I believe that if you do it, it will be more beautiful than me!" Liu Ye said with a smile.

"......" The little girl did not speak, but the expression on her face clearly told of his disbelief.

Even if she believed it, the little girl didn't dare to say it openly, you must know that Liu Ye is equivalent to a god-like figure in the capital, and if she is stronger than Liu Ye, it is equivalent to blasphemy?

"Don't believe me? Come here, I'll teach you now! Liu Ye waved at her and called the little girl over irresistibly.

"Mix the alkali block and the sand together, be careful! Don't use your hands, you'll get burned! Go with this tool! Liu Ye said as he 'handed over' a long pipe to the little girl, asking him to learn what he had just done.

"That's right! That's how it looks, put the mixed substance on the fire and burn it! Don't rush! Take your time and spin at a constant speed! The little girl's face was flushed, I don't know if it was excitement or what, but she was very focused at the moment.

The delicacy of the 'female' person is indeed not comparable to that of a man, the melting speed of this substance is very uniform, and just looking at the 'color' of the liquid, you can know that it has been done much better than Liu Ye.

The melted liquid is poured into the finished mold, gently shaken to help set the shape, and soon a tube of the same shape is almost formed.

After being put down, it cooled slightly, and the test tube, which shone more dazzlingly than just now, was born from the little girl's hand, and the little girl's face also 'revealed' an ecstatic smile.

"Look, isn't it very well done! Believe in yourself! Liu Ye patted the little girl's head lightly and encouraged.

"Ahh

The little girl, who was shocked at what she had done, suddenly came to her senses, let go of her hands, and let the test tube fall to the ground, with a frightened expression on her face.

Liu Ye frowned, his left hand stretched out like lightning, caught the fallen test tube and asked, "What's wrong?" It's a shame that such a beautiful thing breaks! ”

"The city lord forgives my sins, I know I was wrong!" The little girl immediately fell to her knees in panic and kowtowed repeatedly.

"What is this for? Not only are you not at fault! And the merit! Liu Ye's brows furrowed even deeper, and he was about to help the little girl up.

"I was really wrong! City Lord, please punish me, I shouldn't ......" The little girl avoided Liu Ye's shoulder, and there was already a cry in her words.

"It shouldn't be ...... What shouldn't be? Liu Ye was even more strange.

"It shouldn't be better than the city lord!" The little girl's voice was as low as a mosquito, if it weren't for Liu Ye's keen hearing, she would have really flown over as a mosquito.

"If you do better than me, you are guilty?" Liu Ye was taken aback, and then he understood what was going on.

Turning his head to look at the other city residents, Liu Ye asked, "Do you all think so?" ”

The townsfolk were stunned for a moment and nodded slowly.

"That's a big problem! I said how the speed of development has slowed down significantly during this time, it turns out that this is the reason! Seeing everyone's expressions, Liu Ye suddenly understood.

"No, this problem must be solved, otherwise it will cause some big disaster if it can't be guaranteed in the future!" Liu Ye is familiar with modern history, so he naturally knows what the consequences will be if he goes too far.

"Suspend all activities, gather all the citizens of the city, I have something to say!" instructed the guard next to him, Liu Ye let this little girl go with him.

When they saw this scene, they felt sorry in their hearts, and they all thought that this little girl seemed to be punished. And looking at the posture of the city lord, this punishment is not small.

The little girl's face was as dead as ashes, and she thought so in her heart. The city lord's methods of managing the capital during this period have shown that Liu Ye is not gentle, on the contrary, he is very strict, and many people have already suffered because of violating the regulations.

Liu Ye's order soon came, and the noisy and noisy capital immediately quieted down, and everyone gathered in front of the gluttonous battleship to wait for Liu Ye's announcement.

"Are you all here?" Liu Ye looked at the crowd below and asked in a deep voice.

Behind him, Bei Nanfu stepped forward and replied: "According to the order of the city lord, everyone has arrived!" ”

Today, Liu Ye's face is very ugly, and Bei Nanfu doesn't know what happened, so he copes with it carefully.

"Yes!"

Liu Ye groaned, stepped forward, looked down for a while, and said: "Citizens of the capital, I, Liu Ye, have been the city lord of the capital for half a year!" What do you think I'm a city lord? Is it competent? ”

Liu Ye's words were immediately shouted in unison by everyone below: "Competent!" ”

His hands pressed down slightly, signaling the voice below to calm down: "Very good!" Thank you for your love! Originally, before today, I thought I was a competent city lord! But something happened today, and I realized I was wrong! Couldn't be more wrong! ”

There was a suspicious and 'confused' look in everyone's eyes, and even the north and south Tiancheng behind them were also the second monk who couldn't touch.

Seeing that the crowd below was a little 'commotion' and 'chaos', Liu Ye took out two shiny test tubes, and then asked:

"This is a test tube of a new thing called glass that I invented today, and one of them was burned by me, and the other was burned by this little girl! Now guess which one is mine and which one is fired by this little girl! Liu Ye pointed to the little girl next to him and said.

Hearing Liu Ye's words, the little girl was even more frightened, she shrunk into a ball and trembled.

“……”

After a moment of silence, most of the people shouted, "Right hand! Only a small group of people whispered "left hand"

"Right hand? Is it? Are you sure? Liu Ye asked everyone again.

There is no doubt that the right hand is better fired, the 'color' is shiny, and the pipe wall is flat and straight. The left and right are dark and oddly shaped.

"Sure!" This time, the voice was much louder than just now, and the left-handed ones saw the unkind eyes of the people around them, and they also changed their words.

Seeing the performance of the people below, Liu Ye's face became even more ugly, and he asked, "Why are you so sure that I did it?" Why didn't anyone dare to say that this little girl did it? ”

There was silence below the "......", and no one answered.