"No problem. Everything that wants to conflict with the war is the priority of war." Qian Xiaoxing replied.

"When the cement arrives, start construction immediately."

Then the two discussed the details again. They were discussing it, but they saw Si Yingying climbing up the stairs and saying when they saw Qian Xiaoxing, "Brother Xing, it turns out that you are here, so it's easy for me to find."

Qian Xiaoxing said in confusion: "What's the matter for me?"

"Didn't you say you want to meet Xu Liang and Yang Sishi yesterday? I've called you, you are all here to keep you back." Si Yingying replied.

Qian Xiaoxing slapped his forehead and said, "Oh, I'm so busy that I forgot. Why did you come here in person? Just send someone to call me."

"Why, you still feel sorry for me," Si Yingying felt warm in her heart when she heard Qian Xiaoxing's care and said with a smile: "It would be great if I had a good understanding of you and I. As soon as I called in my heart, you would come over."

When Qian Xiaoxing heard this, he suddenly realized that this era where communications are basically roaring, and it is really impossible to ask for too much. If it were modern, it would be very convenient to have mobile phones. By the way, ancient communications were too backward. If there was an important military information that could not be transmitted immediately, it would delay the fighter jets. Thinking of this, I thought about making improvements to ancient communications.

After seeing that there are many important strongholds in Panlong Pass, I started from Panlong Pass and said to Lu Shengzhong: "Brother Zhong, if the Hu army comes to attack Panlong Pass, how can we command each stronghold? For example, let the catapult cart stop the attack on the peak, or let the reserve army come up?"

Lu Shengzhong replied: "This is probably only yelling, but it will be very noisy during the war, and the sound of killing will be shocking. If you can't hear it clearly, you can only send someone to report the news."

"Send people to delay fighter jets. We can't delay the battlefield for a moment. Let's set up a command system. I think the command center can be set up on the tower and then connect each stronghold with pipes. This pipe is used as a sound tube, so that we can quickly issue orders to the various strongholds in Panlong Pass." Qian Xiaoxing thought that modern phones could not be invented, but the sound transmission pipeline could still be realized.

"Microphone? What does it mean?" Lu Shengzhong asked in confusion when he heard this name for the first time.

Qian Xiaoxing explained: "For example, dig the middle of the bamboo, and I speak softly at the end of the bamboo, and you can clearly on the other end. We can connect it with hollow pipes. Brother Zhong, please try it with a log first, pay attention to the position of the connection in the middle, and it must be sealed well, and the inside of the log must be smooth so that the sound can be transmitted far."

Although Lu Shengzhong was puzzled after hearing this, it was strange that this voice could be teleported like this. However, Qian Xiaoxing had already made a lot of things, and each piece was done as it was said. Therefore, Lu Shengzhong had no doubts and replied: "Okay, I'll arrange it immediately."

Qian Xiaoxing thought again and said, "Also, the contact between Guandu and Panlong Pass is not convenient for only fast horses to transmit back and forth. I plan to send information to stand up."

Si Yingying listened beside him and asked curiously: "Information Transmission Station? Is it the same as the beacon tower?"

Qian Xiaoxing turned around and looked at Guandu and replied, "It's almost the same, but the information conveyed by beacon tower is too single, so he can only report whether the enemy is coming. The information transmission station I want can report more specific information."

Si Yingying became even more confused after hearing this and asked, "How do you report it?"

"Use light." Qian Xiaoxing looked from Panlong Pass. Guandu was more than ten miles away and could not see it. After thinking for a while, he said, "The light from afar can be seen even when it is very far away. We make this light into a code, such as three long and two short, representing the enemy's attack. Then the Guandu can effectively cooperate. Build a high tower from here to Guandu to the middle of Panlong Pass. Transfer the information once and you can send it to Guandu City."

Si Yingying thought for a while and asked, "But where does this light come from? If you use fire light, you can't see it during the day, and it's difficult to control it."

"Good question, Yingying, I find that you are getting smarter and smarter. You have to pay attention. No one dares to ask for a very smart woman." Qian Xiaoxing joked, but after Si Yingying rolled his eyes, he said: "After using fire as the light source, I want to make a mirror to reflect light." Qian Xiaoxing remembered modern flashlights, and there is a concave mirror behind the light bulb, which can enhance the reflection of light.

"Mirror? Bronze mirror?" Si Yingying asked.

"It's a glass mirror. I'm about to find Xu Liang to make it, and it can be used for sale. That's a good thing." Qian Xiaoxing replied.

"Okay, Xu Liang is in the process of keeping you in check, let's go quickly."

Qian Xiaoxing and Si Yingying bid farewell to Lu Shengzhong, and they went to Guandu. When they arrived at Guandu Imperial City, they arrived at the conference hall. Xu Liang and Yang Sishi had been waiting for a long time.

When the two saw Qian Xiaoxing rushing back in turmoil, they both stood up to greet him. Yang Sishi said, "Dr. Qian asked us to come, do you have any instructions?"

Qian Xiaoxing sat down and took a sip of tea, signaled them to sit down and said, "Yes, I'm going to set up a military factory to build weapons for our soldiers. Yang Sishi, you are familiar with production, so I can only hand over this task to you."

"I have only made carriages before, but you can see me as Mr. Qian. I have arranged such an important job. I, Yang Sishi, have nothing to say. I will do my best to sacrifice my life." Yang Sishi knew that it was an extraordinary time, and the people of the whole country were working together to resist the Hu army. Of course, he had no choice but to agree in one go.

Qian Xiaoxing nodded with satisfaction. Yang Sishi was so enlightened. After seeing what he ordered, he would do his best and said, "Okay, first of all, you can make two things, one is a catapult cart and the other is a powerful crossbow machine. I will draw it for you later. Also, ordinary weapons are currently mainly bronze. I want to make some iron weapons, which will be stronger and sharper."

"Okay!" Yang Sishi replied readily.

Qian Xiaoxing turned to Xu Liang again. Xu Liang had fired cement and could also burn glass, so he said, "When you go back, you can find out where there is an iron ore nearby. We will make it ourselves. When we find out the iron ore, you will be responsible for smelting iron."

Xu Liang also replied: "Okay, no problem."

Qian Xiaoxing continued: "There is also the glass you burn. I ask you to burn a piece of glass with a flat surface. The bigger the one you can make, the better. Then, you mix it with tin and cement and apply it on one side. This is a glass mirror, which is much better than a bronze mirror. Xu Liang, make it for me. After the technology is mature, we will produce it in batches and open a mirror processing factory, and you will be able to earn more income."

"Okay, I'll send it to you immediately when I'm done." Xu Liang replied.

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Chapter completed!