For example, after Ma Qiang successfully tested the first batch of glass products in Yangshugou, he asked Yang Chi and Yan Fa to learn well and go back to train craftsmen to try to make glass bulbs by the way, and to ensure that the bulbs can be lit for more than 200 hours.

Before there is no inert gas, this is almost the limit of the bamboo light bulb, but to achieve this limit, the environment in the light bulb must be turned into a vacuum.

To put it bluntly, vacuum is to suck the air away, which sounds very simple, but if you don't know anything to do, I'm afraid you can't think of what to do except suck with your mouth, but in fact, you can use mercury and atmospheric pressure, to put it bluntly, you can find a big test tube, fill it with mercury, and then turn it up in a tank filled with mercury, then there will be a section of no mercury in the upper part of the test tube, and the vacuum will appear, which is the simplest vacuum pump principle.

However, when the vacuum glass bulb is removed from the vacuum pump and then the lamp cap is installed, some air will enter, and how to solve this problem has become the biggest problem for Yan Discovery.

After listening to Yan Fa's explanation, Zhang Zhen found that he seemed to have the opportunity to understand the so-called electricity and electric lights, and he pretended to say, "There is nothing difficult in the world, but I am afraid that there are people with hearts, one person counts the short, and the two count the long, so let's take us to see it later, maybe we can come up with some way." ”

Yan Fa was a little moved when he heard this, he and Yang Chi had grabbed a lot of hair for this topic these days, they believed that Ma Qiang must have the answer, and they just wanted to exercise them so they came up with a question for them to do.

But since it's a topic, wouldn't it be inappropriate to let Zhang Zhen and them participate...

Zhang Zhen touched his beard and hummed, "What? Will the old man do anything wrong? The old man sincerely helps you, so that this technique can illuminate the people of the world in the future, is it for himself? ”

"Yes, yes, although this is the question that Mr. Ma gave you, but doesn't Mr. Ma also let you have assistants, don't you use the ideas that those assistants come up with? We can be your helpers too! ”

Yan Fa thought about it, and said with some embarrassment, "Since this is the case, then it will trouble Master Zhang and this gentleman." ”

Zhang Zhen glanced at Gan Shi, and now he knows the importance of the old man.

Yan Fa took the two into the Red Star Valley, and the sergeant on guard saw that Yan Fa led the team, and the two were wearing Mr. clothes, so they didn't care, and arrived at the Red Star Camp, after all, the Red Star Valley doesn't look at people, and they won't check people's identities until the real R&D or production workshop.

The first area is the earliest soap, toothbrush, toothpaste workshop, the two of them watched a cart of toothpaste, soap and other things being loaded into the car, they couldn't help but look at each other, they all know the value of these things, where is this transporting goods, this is simply transporting money.

The next thing that catches your eye is a huge waterwheel connected to a nearby workshop.

"What a wonderful thing!"

Waterwheels have appeared in this era, but this is the first time that the two of them have seen such a huge waterwheel.

"This is an oil mill, and the waterwheel can be connected to the ram inside, and the oil can be pressed out of the beans." Yan Fa said casually, in his current heart, such a simple use of water power can no longer be put on the table.

"Oh? Save manpower with water power, wonderful... Can beans be pressed for oil? Zhang Zhen found that he seemed to have captured some extremely important information.

In fact, soybean oil extraction has been discovered in the Han Dynasty, but the real popularity has not been until the Song Dynasty, the oil used in the Han Dynasty is basically animal oil, and a small number of nobles can use sesame oil, that is, sesame oil, which is also thanks to Emperor Wu of the Han Dynasty to open up the Western Regions to eat.

"Well, it's more difficult, this is a shochu workshop, do you know shochu?" Yan Fa casually pointed to another workshop and said, Gan Shi smelled it, and almost fell to the ground drunk, this smell... It's over, it's over, and the poor road is going to die here.

Zhang Zhen doesn't like to drink as much as Gan Shi, but just by smelling it, you can know that the wine here is excellent.

Further inside, you can see several kilns in a clearing.

"There's a kiln for porcelain and glass."

The two of them already knew what it was, and the glass had been looking at it for a day, and they both nodded in understanding.

"Okay, this is our laboratory, and further inside is Mr.'s place, and you are not allowed to approach it over there."

Yan Fa pointed to a house and said, and walked over with the two of them, there was a large mess of copper wires and various materials on the side of the house, as well as a stove and kiln that were burning on fire.

Yang Chi was leading people to look at the kiln, and when he saw Zhang Zhen and the others, he couldn't help but exclaim, "How did the two gentlemen get here?" ”

"I brought it, Master Zhang is rich and has five cars, and Gan Daochang is also proficient in mathematics, what may be done." Yan Fa scratched his head and explained.

Yang Chi shook his head and said, "What we have learned is taught by Mr., they are not from my Red Star Camp, not to mention that even if we are from the Red Star Camp, not everyone is qualified to learn Mr. Science." ”

After this period of study, Yang Chi has become a fan of Ma Qiang, and he is deeply dissatisfied with Yan Fa's behavior of taking outsiders to the laboratory without authorization.

"Two gentlemen, this is the forbidden area of our Red Star Battalion, please go back, guard!"

With Yang Chi's shout, two warriors with black ribbons on their clothes and ring-headed swords pinned to their waists came over and stretched out their hands to the two of them to express their invitation.

Zhang Zang was ashamed and angry, his old face was flushed, Gan Shi saw Zhang Zang like this, smiled, touched his beard and stepped forward and said, "I didn't expect it, the disciple of the dignified Ma Maocai, but he is such an incompetent and mediocre person, it seems that Ma Qiang is nothing more than that, Master Zhang, let's go." With that, Gan Shi turned back to leave.

"Gan Dao Chief! Why slander the reputation of our husband! Without waiting for Yang Chi to speak, Yan Fa became angry first.

The corners of Gan Shi's mouth were slightly curved, but when he turned around, the anger on his face was even greater than that of Yan Fa, "If you are not mistaken, in the past, Ma Mao made the law of treating plague public for the sake of the common people in the world, it can be seen that it is like Confucius and Mencius in the past, there is no class, and I and Master Zhang also came here because of this."

I didn't expect to see Ma Maocai yet, but I heard such a doorway opinion, I guess it must not be Ma Maocai's original intention, but this son misinterprets the teacher's intention!

The two of us came without malice, with good intentions, and with good intentions, and thirdly to relieve the difficulties of the people, so that we will not tell you that on the way to the poor road, we have already thought of a way to solve the so-called vacuum, and we want to help you and others, so that in the future, all the students in the world can read poetry at night and no longer suffer from smoke.

No matter what, Poor Dao didn't expect Mr. Ma's disciples to be so unbearable, they really walked hundreds of miles in vain, I am afraid that I don't know how many talented people will be rejected by this bureaucracy in the future, delaying Ma Maocai's major event. As he spoke, he looked angry and dragged Zhang Zhen to leave.

Although Yang Chi learned some scientific theories from Ma Qiang, where did he meet a person like Gan Shi who could speak well, he was so fragmented by Gan Shi's words that he couldn't answer for a long time.

Zhang Zhen looked like a ghost, didn't you come with me to learn secretly? How did you suddenly become like a saint? And also... So what kind of vacuum, do you have a way? How did I not know???