After this reward, Song Yingxing was completely confused. Two million taels were worth a lot of money. Faced with this huge amount of wealth, he was really a little confused. How could he share the one million taels for his subordinates? How could he spend the one million taels? He was thinking about these questions, and he even forgot to greet the emperor.

Zhu Cijing was not in a hurry. When he saw Song Yingxing standing there in a daze, he knew that this guy must have been shocked by such a large sum of money. He needed some time to think and adapt. He did not interrupt Song Yingxing's thinking, but curiously looked at the decorations of the study.

This study room can be said to be the most unlike study room he has ever seen. Although there are many books, there are more messy things than books. The entire study room is full of jars and jars, and I don’t know what it contains. The strangest thing is that there is a half-person-high kite in the corner of the study room!

Well, maybe that's not a kite. The reason why Zhu Cijiu thought it was a kite was mainly because it was made of bamboo strips and paper, but the shape was not like a kite, because it was a square frame.

What exactly is this thing used for? Zhu Cijiu couldn't help but stand up and walked towards that corner, wanting to observe it up close and see if it is used.

Zhu Cijing was observing the "Kite". Song Yingxing finally woke up. When he saw the emperor looking at the Kongming lantern he made, he hurriedly walked up respectfully and introduced carefully: "Your Majesty, this is a large Kongming lantern."

Kongming lantern! Zhu Cijing reacted instantly. He said that he looked familiar. In his impression, Kongming lantern was only one foot square. After magnifying so many times, he really didn't think about it. But why do you do such a big Kongming lantern?

He couldn't help but ask curiously: "Chang Geng, what is this for?"

When Song Yingxing heard this, his old face turned red and said embarrassedly: "Weichen saw that there was too much oil extracted, so he wanted to use it on war. Isn't Siberia so much bastions? Weichen thought, if he lights a bunch of Kongming lanterns outside, decorate more oil, and put them together, put them in the air with the wind, and then smash them with a sniper rifle and falls down, wouldn't the bastion fall into a sea of ​​fire!"

Now it was Zhu Cijiu's turn to be confused. How can I say this tactic seems to be a bit desirable, the cost is not very high, and it is not very difficult to operate. However, it always makes people feel strange to play such primitive tactics when they have muskets and cannons.

Seeing Song Yingxing's embarrassing look, he couldn't bear to hurt others' enthusiasm, so he could only say politely: "Even if Kong Minglan is so big, it may not be able to carry much oil. To put a bastion in the sea of ​​fire, the oil needed is not a little."

Unexpectedly, when he said this, Song Yingxing became excited. He saw the guy whispering excitedly: "Master, Kongming lanterns can be made bigger. A half-person tall can be almost a pound of oil, and a few pounds of oil can be made as big as the oil. If he could fill hundreds of pounds of oil at a time, wouldn't it be that the whole bastion would fall into a sea of ​​fire after several Kongming lanterns?"

This guy is getting more and more outrageous. How big does it take to fill a hundred kilograms of oil? I'm afraid a house is not enough to be so big!

But why does it seem like a bit familiar? What is a huge thing that heats the air through flames and flies into the sky?

Zhu Cijing thought for a long time, and finally remembered that it was a hot air balloon!

The hot air balloon has slowly lost its function after the plane appears, but it is still useful before it is not available, especially in war.

Of course, hot air balloons are not used to pour oil into enemy castles. Its main function is to detect, observe the landing points of shells, and position the artillery.

For example, in siege battles, especially in attacking bastions, due to the height difference, the attacking party cannot see the situation in the bastion at all. The artillery attack can only cover the attack with the most depleted ammunition, and the effect is not very good.

It’s different with a hot air balloon. Use a rope to tie the hot air balloon and then rise to a height higher than the bastion. The investigators can use a telescope to see clearly the situation inside the bastion, the location of the enemy artillery, the arrangement of personnel, the landing point of his own artillery, etc., and can all be informed by the commander below through the flag slogan. In this way, only a small number of shells can achieve a terrifying effect, which is many times better than a purposeless coverage attack.

With hot air balloons, the battle in Siberia was easier, because the main thing the Ming army had to face was the enemy's bastion.

Zhu Cijiu became more and more excited the more he thought about it. He couldn't help but pull Song Yingxing to the desk and said excitedly: "Chang Geng, I'll draw something for you and see if you can do it."

After saying that, he picked up the brush, dipped it in some ink, and then drew a sketch of a hot air balloon after a few strokes.

I have to say that he has a very profound foundation in painting. Although he only has a few dozen comparisons, he paints hot air balloons vividly.

However, Song Yingxing couldn't understand, and he couldn't help asking: "Prince, what is this?"

Zhu Cijing pointed to the sketch and explained in detail: "This is a hollow ball made of cloth similar to oil paper. Below is a hanging basket woven by bamboo or rattan. People can stand inside. As long as you find a way to fill the ball with air first, and then heat it with fire, it will rise into the air like a Kongming lantern."

When Song Yingxing heard this, he was shocked and said, "How big does this thing have to be made with people ascend into the air?"

Zhu Cijing didn't know the specific size of the hot air balloon. He could only spread his hands and said: "You can try it slowly when you want to do it. This thing is very useful for the war in Siberia next year. I hope you can concentrate your manpower to make it first."

Upon hearing this, Song Yingxing immediately fell into deep thought. Since it was useful to the war in Siberia, he naturally had to do his best to do it as soon as possible.

After thinking for a while, he couldn't help asking: "Master, is it okay to sew a layer of oil paper outside the cotton cloth? It seems difficult to make the cloth not breathable. Also, what if such a big thing is blown away by the wind when it rises, the people inside will be in danger."

Zhu Cijing heard this and thought for a while, then said, "If the cloth is soaked in sticky things and then dried, it can be airtight. Of course, if it is not troublesome to sew oil paper, you can also try it. As for the problem of being blown away after taking off, you can tie it to the ground with a rope."

Upon hearing this, Song Yingxing couldn't help but say shamelessly: "Thank you for your teachings from the emperor. I don't know how to name this thing, is it still called Kongming lantern?"

It was naturally not suitable to call Kongming lanterns. Zhu Cijiu pretended to think for a while, and then slowly said: "This object is spherical and then launched into the air with heat. It's called a hot air balloon."
Chapter completed!