The reason why I asked Zhang Laodao for help was because Xia Hongsheng wanted to make fireworks.

The hot air balloon was given to Li Li, and the fireworks should be given to Xu Hui, and one cannot be favored.

To do fireworks, Xia Hongsheng is a layman. I know a little bit about the principle, but I don't know if I can do it. Sending fireworks into the air, this Xia Hongsheng feels that it can still be made, the key is the shape and color of the fireworks after they are lifted into the air, which is really difficult for Xia Hongsheng.

Xia Hongsheng feels that a firework must have at least two parts. One part provides the power, and the other provides the effect. The first part provides power, sending the second part into the air, and the second part explodes in the air, creating different shapes and color effects.

Xia Hongsheng has also been thinking about it for a long time, and since he was ready to start making hot air balloons, he had already begun to think about how to complete the fireworks.

The color, needless to say, must be a flame color reaction. This Xia Hongsheng knew, even until that different elements made the flames have those different color effects. Sodium, yellow potassium, purple calcium, brick red, magnesium white, aluminum, white iron, golden yellow, blue, lead, green, barium, copper, blue-green, plus a strontium blood red. But the problem is, there are so many things in this stuff that can't be made!

So it was really helpless to find Zhang Laodao. He has been alchemy all his life, and he dares to exchange anything into the so-called "elixir", just as Xia Hongsheng asked, when the fire is ambushed, sometimes the spark changes color. This is exactly the flame reaction, but that old man doesn't understand, and he thinks that he has refined some powerful pill.

Xia Hongsheng brought Zhang Laodao to try to get Zhang Laodao to restore the flame reaction he encountered when he was alchemizing, and to find out what caused the flame reaction.

If you can find out what triggers the flame color reaction, you can make the part of the fireworks that makes the fireworks show different color effects - Xia Hongsheng didn't know what the technical term for this part was called.

Therefore, fireworks should be a two-stage structure, just like a rocket, there is a propulsion power first, and after liftoff, the second-stage structure is ignited, so that the fireworks burst into different colors and shapes in the air.

There is also the shape, in fact, if you think about it carefully, the shape of fireworks is composed of bright spots, that is, it is a shape formed by the particles that can "show different color effects" flashing together. So if those things that can produce a flame reaction are made, they are mixed with gunpowder to make shiny entities, and then these individuals are put together into some kind of pattern and fixed, and then the outer layer of gunpowder is pushed into the air and ignites them, so the air will take on different colors and shapes.

Xia Hongsheng felt that fireworks were estimated to be such a principle, so he decided to try it in this direction.

"I said, junior brother, why did you start to stay here?" A voice came from Xia Hongsheng's ear, interrupting Xia Hongsheng's thoughts about fireworks.

"I'm a little drunk." Xia Hongsheng shook his head and said to Xu Qixian with a smile: "Why isn't my brother playing over there?" ”

"Those drunken maniacs!" Xu Qixian took a sip angrily and sat down next to Xia Hongsheng: "It's not good to be poured for my brother." There are still some things to discuss with you today, but you can't get drunk. So sneak around and slow down for a while. ”

"What's the matter?" Xia Hongsheng turned his head and asked, "Just say it to me." ”

Xu Qixian smiled, lowered his voice a little, and discussed with Xia Hongsheng: "Senior brother, my brother also wants to go to your Jingyang Academy to study, do you see if you can be accommodating, and let your brother be inserted in after the New Year?" ”

"My brother is willing to come to the academy, so I naturally welcome it. The seventh year of the academy opens, and it is not difficult to let my brother enroll in school by then, and it is okay to ask Master Liu a letter of recommendation. The college allows students who are very good in a certain area, or who are recommended by the gentleman, to make an exception and half-way admission. Xia Hongsheng said to Xu Qixian: "As long as my brother asks Master Liu for a letter of recommendation, there will be no problem." It's just that...... It's just Uncle Xu, has Uncle Xu ever agreed? ”

"Naturally, I have already explained them, and I came to talk to my brother for my brother." Xu Qixian nodded and said to Xia Hongsheng: "Actually, my uncle and my father didn't object, as soon as my brother proposed it, they immediately agreed." Seemingly, it's a pleasure. ”

Xu Xiaode has been an official from the previous dynasty to the present, and he has experienced several ups and downs in the middle, but he can keep his family safe and sound, and his vision is also unique. It can naturally be seen that Xu Qixian is in Jingyang Academy, and there is more world than in Hongwen Hall.

"That being the case, on the sixth day of the first lunar month tomorrow, Master Liu is also in the academy, so you and I will go to Master Liu together and ask Master Liu to write a recommendation." Xia Hongsheng nodded and said.

Xia Hongsheng's vision thinks that it is not bad. Xu Qixian is smart and studious, if he is a scholar, he will eventually be able to achieve something, but if he is in politics, his personality is extremely uncomfortable, and I am afraid that he will not even be able to do a county order. It's just that he can only keep this in his heart, after all, the person in charge of the Xu family is Xu Xiaode.

So for Xu Qixian's decision, Xia Hongsheng is also very happy. After all, Xia Hongsheng was still very grateful to Xu Qixian for helping him, or the predecessor of his body. Luanzhou Academy was originally when Yan Shigu was demoted to Luoyang, seeing that Luanzhou was good, so he ran a private school there, and the protégés of Liu Shi in the academy were only Xu Qixian and the previous Xia Hongsheng, and the previous Xia Hongsheng's family was extremely poor, Xu Qixian, the senior brother, had a lot of money, although Xia Hongsheng at this time was no longer the original Xia Hongsheng, but after all, he got his body and identity, along with memory. The grace of dripping water, when the spring reciprocates, Xia Hongsheng has never been an ungrateful person.

If you treat me well, I will treat you better. This is Xia Hongsheng's principle.

"Childe! Son! Qi Yong's figure suddenly appeared in the corridor, shouting Xia Hongsheng in a low voice, and walked over.

Xia Hongsheng turned his head over, and his eyes immediately froze. In Qi Yong's hand, he held a piece of paper used by the spy battalion to transmit news and intelligence!

"Brother, there is something that the younger brother needs to go to the study." Xia Hongsheng said goodbye to Xu Qixian, and took Qi Yong to the study together.

When he arrived at the study, Xia Hongsheng spread out a piece of paper to the hall, and then ordered Qi Yong to take the ink, and then spread the paper in Qi Yong's hand and put the ink on it.

The paper immediately filled with ink, but in some places on that paper, the ink slipped away and did not touch the paper.

Qi Yong picked up the paper, Xia Hongsheng took another piece of paper and covered it, sucked up the ink, and then picked up the paper that was splashed with ink. That's above. It is very clear that there are some traces that are not stained with ink, which are numbers.

Xia Hongsheng took out a book from the bookshelf behind him, which was the secret text, and translated it. (To be continued.) )