"What! Miss, I can't defend such a big place as Yaozhou. You are about the same as 30,000 soldiers." Li Xueyi shook his head when he heard him let him protect the guards of Yaozhou.

"You 20,000 troops cannot protect the safety of Yaozhou. Isn't this possible?" Li Yu looked surprised.

Li Xiuning rolled his eyes to Li Yu and said, "You have been with the Women's Army for so long, don't you know how many troops the Women's Army are?"

"Isn't the Detachment of Women's Army 20,000?" Li Yu felt strange. He knew that the Detachment of Women had 20,000 troops.

"You are talking about wartime. There are indeed 20,000 people and horses in the Detachment of Women's Army plus 6,000 people, but is it now a wartime?" Li Xiuning said: "Removing the Detachment of the Detachment of Women's Army, a total of 14,000 people in the Detachment of Women's Army. Don't forget that all the soldiers still have fields at home, and they have to go home to farm. It would be good to participate in the protection of the entire Yaozhou with 10,000 people."

Li Yu slapped his head and said, "I forgot that the Detachment of Women is not a professional soldier, they are half-soldiers and half-agricultural."

He smiled bitterly and said, "That's not right. Even if there are ten thousand soldiers, can't we focus on protecting a steel plant?"

"The main warning cannot be reached, and I don't know where the enemy comes from. When I find out that the enemy may have already reached the forefront, if my son-in-law can solve the problem of discovering foreign enemies early, I can guard the entire Yaozhou for safety." Li Xueyi's eyes kept turning in his eye sockets.

Li Yu saw Li Xueyi's eyes flashing and asked with a smile: "You are not the idea of ​​fighting the communication equipment of the Dragon and Phoenix Empire, right?"

Li Xiuning intercepted the sentence: "The main reason is that the entire Yaozhou area is too large. If the enemy is found to attack suddenly and the enemy's attack location is not clear, the army will not be able to determine the target. Perhaps when the army determines its location, the war may have ended, and it is mainly a problem of communication."

When Li Yu saw that both of them were thinking about the communication equipment of the Dragon and Phoenix Empire, Li Yu sighed and said, "If the wireless phone is configured, how can you fix it if the equipment is broken? As for the telegraph machine, I think it's better to forget it. How to use it in an army without any words is a big problem."

"What should I do? Can the safety hazards in Yaozhou be solved?" Li Xiuning looked a little at a loss in her eyebrows.

Li Yu shook his head again and said, "Wireless communication is very convenient to use, but it requires deep cultural knowledge in the army. Without these foundations, even if you are assembled, you can temporarily play a role of reuse. If they are used to using it, the equipment suddenly fails and cannot be used, and traditional communications do not know how to use it, then it will be a big trouble in the future."

"What should I do? I originally meant to rely on you to solve the communication equipment problem, but it seems that I can't count on it anymore." Li Xiuning was extremely frustrated.

Li Xueyi pointed to the sky and said, "It would be great if he could fly like a bird and eagle in the sky. This would allow us to quickly transmit information."

"Hey! Your proposal is good, the technology is simple, and it can be popularized." Li Yu's eyes lit up: "I originally planned to guide and then build the aircraft gradually after building the internal combustion engine. Now it seems that the time for building the aircraft is too long and there is no time left. I think it's better to build hot air balloons. The technology is not complicated and can be popularized in the Detachment of Women. More importantly, it can add a new branch of the Detachment of Women - the Air Force."

"What kind of military branch is the Air Force?" Li Xueyi looked confused.

Li Xiuning said in a silence: "I know this, literally, it is a kind of military service that fights in the sky."

"Waring in heaven, isn't it possible for people like son-in-law to do it?" Li Xueyi was even more confused.

Li Xiuning turned around and rolled his eyes to Li Xueyi, saying, "You idiot, didn't your son-in-law just say he wanted to use a hot air balloon?"

After explaining, Li Xiuning's apricot eyes flashed and said, "Li Yu, what exactly is the hot air balloon you are talking about?"

"I have been working on it for a long time, but I don't know, Miss?" Li Xueyi murmured from the side.

Li Yu heard Li Xueyi muttering to his lady in a low voice, smiled and said, "This hot air balloon is a tool that can fly in the sky. With the hot air balloon, you can see things in the distance from a long distance. As long as you create more, it will become an observation deck for activities in the future. I am giving them a telescope so that the soldiers of the Detachment of Women can patrol the air. If you discover the enemy situation, you can attack underground targets in the air."

When Li Xiuning heard this, she smiled and said, "With the hot air balloon in the future! Will our Women's Army have a new military branch?"

Li Xueyi clapped his hands and laughed: "If this is the case, then our Women's Army will be invincible in the world in the future."

"But, the sky is so high, how can I transmit information?" Li Xiuning's eyebrows were half bent and her eyebrows slammed.

"Since I want to use hot air balloons, will I have no choice? In fact, it is very simple. Then I can write a set of special flag languages ​​and quickly pass the message out? Li Yu smiled and said, "But let's talk first. This technology Dragon and Phoenix Empire will be eliminated without development. It is directly used by airships. If you, a woman, dislike this technology backward, then forget it."

"If you don't dislike it, don't dislike it, you can let ordinary people fly away. If it's an elimination technology? Whoever dares to say it, I will fight to the death." Li Xiuning's apricot eyes flowed out of her.

Li Xueyi was shocked and hurriedly said, "Son-in-law, go to the sky! Hot air balloons can really go to the sky! Fly like birds?"

Li Yu nodded and smiled, "Yes, this hot air balloon is made of buoyancy using expanded hot air. Just heat the air with fire."

"Floating power? Isn't it that there is buoyancy in the water? How come it goes to the sky?" Li Xueyi became a good student.

Li Yu looked at Li Xueyi and raised his head to Li Xiuning, saying, "Ask your lady, she understands this, I have told her before."

"That's how this buoyancy is..." Li Xiuning became a good teacher.

Li Xiuning was explaining the principle of buoyancy to Li Xueyi, but Li Yu was conceiving the manufacturing process of hot air balloons.

Fuel! It’s easy to say. The lighter factory run by the development zone has extracted a large amount of diesel, gasoline, kerosene... The extracted oil is now used for use. Now it’s good, and it can be used on hot air balloons. I’m afraid it can’t be burned every day.

As for the ignition device, it is only possible to hand it over to the Dragon and Phoenix Empire for manufacturing, and then let the craftsmen of the Tang Dynasty imitate it. It is not a high-tech thing.

Li Yu thought about the composition of the hot air balloon and any materials that could be found, and had already formed a general idea in his mind.

Since I had the idea, it was easy to deal with. Li Yu finished drawing the sketch according to the appearance of the hot air balloon in later generations and handed it to Li Xiuning: "Look at whether you can sew this? The main parts are oval, and some places need to be opened. Use more lines when sewing. Pay special attention to the use of fabrics that should be dense and do not breathe, and this thing is very big. Are you sure to do it?"

"Looking at people, what's the problem? I'll find materials to sew it later." Li Xiuning curled her lips after reading the drawings.

Li Yu heard this and patted his palm and said, "It's fine. Since the biggest problem is solved by the airbag, other things are really nothing."

"Son-in-law, what am I doing? You can arrange it quickly." Li Xueyi was already eager to try something that could fly! Who wouldn't be excited?

Li Yu said to Li Xueyi: "You arranged for craftsmen to make hot air balloons. I think it's best to weave them with bamboo to reduce weight."

"Okay, leave this to me, I promise to do it." Li Xueyi patted his chest.

After the decision was made, the three of them divided the labor and began to make the materials for hot air balloons.

Li Yu entered the space, and Yang Yuanyuan and Xiaoling happened to be in the room.

When Yang Yuanyuan saw Li Yu coming back, she immediately stood up and joked with Li Yu, "Oh! I'm going to be a master soon, so why don't I come back to see you? You have a slave here to wait for you to get evenly with rain or dew?"

"You call the Machinery City now and arrange for the machinery factory to produce hot air balloon ignition devices. Let's do the job again." Li Yu grabbed it with a soft and elastic hand, laughing.

When Yang Yuanyuan saw Xiao Ling looking at her with a smile, she immediately made her face blush. She immediately glared at Li Yu and said, "I'll make arrangements right away, Master, wait."

"Hey! I am Yang Yuanyuan, I will design the ignition device of the hot air balloon immediately. This is the king's order." Yang Yuanyuan ordered to the phone.

"Prime Minister Yang, don't worry, I will arrange all the engineers immediately and start designing now." The end of the phone will answer immediately.

Suddenly, the machinery factory was in chaos, and all the engineers participated in the design of the ignition device...

"Hehe, Yuanyuan's hormones now exceed the standard ten times. It seems that the body is going to be mated. "Xiao Ling laughed and said, "I'll go to the machinery factory to see it, you guys continue!"

As he spoke, Xiao Ling flashed white light and disappeared without a trace.

"Master, look at Xiaoling!" Yang Yuanyuan's face turned red and her face turned hot.

"What are you afraid of? Xiaoling is just an intelligent brain. She doesn't understand such interesting things about humans. Why are you shy?" Li Yu didn't care. It seemed to remind him of the scene when he and Liu Ninghan were watched by Xiaoling for several days in the cave.

"But being told to someone in person is embarrassing?" Yang Yuanyuan put it in Li Yu's arms and muttered in a low voice.

Li Yu Xiaoxiao did not respond. After unzipping the zipper on her skirt, he asked strangely: "You are so strange today. Why did my seniority suddenly upgrade? You used to call me a young master, why do you call me a master now?"

"The master is about to get married, so it's not appropriate to call him Young Master, so I'll call you Master in the future!" Yang Yuanyuan kept kissing his chest, explaining breathlessly.

"So that's the case? I said why did you suddenly call the master? It turned out that it was the reason why I wanted to get married." Li Yu untied the best piece of clothing, threw it aside, and smiled.

"Master!" Yang Yuanyuan's face was full of spring and sent an invitation.

"I understand, now we only talk about the romance and the moon, not the state affairs!" Li Yu picked up Yang Yuanyuan, who was already a little Aries.

"Master, I've been drought for several months. You have to reward me today!" Yang Yuanyuan's face looked like a peach blossom.

He smiled and said, "I understand, but you must not ask for forgiveness later..."

"I'll talk about it then..., uh!"|

...

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