Although Tubo, Turks, Khitans and the Tang Dynasty were hostile, some of them were still responsible for diplomacy in the Tang Dynasty.

Naturally, diplomats are responsible for intelligence collection.

Most of the information they collected in the past was the situation of a certain official or a relative of the foreign country.

Including things in the palace, what the emperors of the Tang Dynasty like.

Since last year, the information they have collected has pointed more at Lijiazhuangzi.

He said that Li Yi took out something from Li Nong the day before yesterday, drew the drawings himself and sent someone to send them back. If he couldn't bring the real thing, he would be stopped.

He said that Li Yi took out something yesterday, and continued to draw the drawings and passed them back.

It is said that Li Yi asked the people to make money by chiseling ice together today, as well as tools to stand firmer on the ice and tools to drill ice.

It is said that Li Yi also asked the people of Chang'an to make money by rubbing mud and making money, and the people have a better life and have spare money.

It is said that the fireworks made by Li Yi can be used to bomb the enemy in the military. They are very powerful and can only be stared at by others if they buy them.

It is said that Li Yi brought the chickens and ducks from the village to Henan Prefecture. A large area east of the Taihang Mountains experienced a locust plague, and the chickens and ducks were dealing with it.

Before it was quiet for two days, something even more scary came out, and Li Yi made a big ball that brought the person to the sky.

How could the envoys sent by various countries not know what the people can think of?

This big ball is a life-threatening person. The Tang army is preparing for a lot of preparations. How should it deal with it?

The two sides agreed to set up a formation and look for an opportunity to fight.

As a result, the Tang Dynasty flew over, looking for flag attacks, and commanding the truth.

No, we can't let the Tang Dynasty have it. No, we can't let the Tang Dynasty have it, we also want it.

Whether the envoys from various countries wanted to fight against the Tang Dynasty or against others, they were all thinking about new things.

"It's right for all the workers to disband, it's useless to keep it." Yao Chong ran to the heaven and earth for dinner. Today, the three of them, Wei Zhigu did not come.

"Yuanzhi, don't always think about it." Lu Huaishen advised.

He understood how much Yao Chong had been worried about the affairs of the hundreds of craftsmen.

"Now the city is full of people. We have not seen any real thing, so we should think of a solution." Zhang Shuo turned the topic to the main business.

"The ball that can be taken to fly must have its disadvantages. Like a light that is released, it can only move with the wind."

Lu Huaishen kept up with the topic.

Yao Chong looked at the lantern light outside: "I don't know how many people I can kill, I only know that whenever the wind blows to the enemy, the enemy will be worried.

If the day is fine and the wind blows at night, can the soldiers rest with peace of mind? Who is not afraid of being attacked in the dark?"

Yao Chong found that the deterrent power of the ball may be greater than the actual combat power.

"It's better not to imitate it, otherwise you would rather not create equipment to the army than ask the enemy to learn it."

Lu Huaishen expressed his thoughts, and he was afraid that Tubo and Turks would have nothing to do with hot air balloons to make trouble in the Tang Dynasty.

"The wind is too strong, and it will blow far away. Can the ball fly back?"

Zhang Shuo frowned, and he understood Kong Mingdeng and let him go.

When a kite is flew, it needs to be connected with a wire, and the ball is connected with a rope. How long does it take?

"I haven't seen anything, so I can't start talking about it. Ask Your Majesty, take one to the palace and have a meal."

Yao Chong found that there was nothing to discuss at the moment, so he simply didn't say it.

Zhuangzi was having a meal, and the five hundred feathers were flying to get their own food. The topic of discussion was hot air balloons.

"When I went up today, at a height of twenty feet, the wind blew eastward, and it rose to thirty feet, blowing southeastward, and then 50 feet to the westward."

"I discovered it too, but I was 10 zhang north and 50 zhang northwest."

"Does the greater the height difference, the more obvious the direction of the wind blowing change?"

"Look at it tomorrow and fly higher. If that's the case, we can change the direction if we adjust the height."

The Yulin Flying Knights discovered the secret during the chat, as long as they master the height and wind direction.

After the hot air balloon without ropes flew out, it could fly back.

When you reach the enemy's head, fly over, choose the height, and turn back, the process will be slower and will eventually cause damage to the enemy.

Keep up with the wind too strong and don't fly.

Li Yi, who was having a meal in a single room, said his new idea of ​​the method.

"Make a batch of Kongming lanterns, a little bigger, put the hot oil in it, then light the incense and put it on the ropes stretched on the bracket inside.

When the incense burns there, the rope is burned, the lamp or candle is tilted, the ignition is lit, and the paper is burned out from the high heat.

The burning can of ignition oil fell from the sky and ignited the enemy camp below.

Many Kongming lanterns will fly away, fly far away, and waste things.

But if a battle comes at a critical moment, if it succeeds, the enemy camp will be in chaos.”

Li Yi told me the newly figured method, and the two sides fought and could succeed in one success.

"No, if the enemy sees it, the enemy will learn as much as possible. Tubo always likes to attack our Tang Dynasty."

When Li Chengqi heard this, he had a good idea. A large number of Kongming lanterns were released with the wind, and some of them were considered successful if they fell down.

Now no one needs it, no one expected to remind the enemy that the enemy would use Kongming lanterns to attack.

When the wind direction is paired, the military rations and other items from the Tang Dynasty are released. The Tang Dynasty loses more than the efforts to make Kongming lanterns.

Li Longji nodded and said, "Yes, don't say it anymore, so as not to spread it."

"Ah!" Li Yi thought about it, it makes sense. I don't know how much money the Turks have. There are craftsmen and fields in Tubo, and there is oil.

Tubo wants to make it, so it can be made.

There was nothing wrong that night, and the next day, the craftsmen in Zhuangzi made two more hot air balloons.

The Yulin Feiqi continued to go up and test the flight. The length of the rope was controlled at 200 feet, and at most it could only be used up.

This time, more people came over to watch after hearing the news. They couldn't enter the Zhuangzi and looked outside the Ba River.

The hot air balloon is large enough to see rise.

Including envoys from all countries, they saw three balls coming up and down today, sorrow came out of their hearts and were written on their faces.

The people of the Tang Dynasty cheered when they saw it, as if the Tang Dynasty would destroy all the surrounding forces tomorrow.

Li Longji's morning dynasty ended, and Yao Chong and the other two refused to leave.

"Your Majesty, I heard a rumor in the market that something new appeared in the Li family village was in a ball shape, with a basket under the ball, and people were carried in the basket, I don't know..."

Yao Chong asked directly.

Before he could finish his words, Li Longji nodded: "Yes, hot air balloons, and the Flying Cavalry in the Wulin are training, and in the future, they will find suitable weather and opportunities on the battlefield to attack the enemy."

"Is this thing easy to control?" Lu Huaishen was worried.

"It's good to make, Lijiazhuangzi is good to make. Others can't make alcohol, and alcohol blowtorch can't make either." Li Longji understood what the old minister was thinking.

Zhang said, "How much is it cost?"

"I don't have to worry about it."

Li Longji did not mention the cost of construction, nor did he want the treasury to provide funds. Zuozang took the money and the court wanted to supervise it.

How could Li Yi’s Zhuangzi be managed by others? And the costs are divided into material costs and technical costs.

Materials are not expensive, but the technology was finally figured out by Li Yi.

Oh, just treat it as not easy.

"Your Majesty, we want to see." Yao Chong was quite helpless when he heard that Li Longji would not leave the court's account.

The gunpowder in the past was not under the jurisdiction of the court, such a dangerous thing.

Nowadays, the hot air balloons are not under the jurisdiction of the court. The hot air balloons and gunpowder have floated from Zhuangzi to the imperial city...
Chapter completed!