This is also the reason why Liu Che sent Zhang Rang to bring Liu Zhang over and asked him to find a way to make a gun.

Make the wishing lantern bigger, and it will be convenient to transport grain and grass by air.

If it does, it will be much faster.

People can also be on the wishing lantern, as long as they can control the direction of flight.

It can be lifted and lowered freely, and the Huns can be found in the sky.

Even put troops in the rear of the Xiongnu to attack the Xiongnu by surprise.

"If you make the wishing lantern bigger, it is a hot air balloon, also called a hot gas lamp. It is possible to cross some high mountains, rivers and lakes. In the event of a crash, it would be difficult for the person on the heat lamp to live. ”

Liu Zhang said the advantages and disadvantages of hot air balloons, if there is a malfunction.

A hot air balloon can crash and no one in the balloon will survive.

I hope Liu Che will think twice, Liu Zhang is not sure to make a parachute.

You can try it, and there are some things that can be made with a little time.

The principle of a hot air balloon is the same as that of a Kong Ming lantern, if Liu Che is determined to make a hot air balloon.

Hot air balloons use propane or liquefied gas, which can be extracted from petroleum.

There were several abundant oil fields in the territory of the Han Dynasty, and the oil was called fierce fire oil in this era.

Since the Han Dynasty, it was discovered by the Chinese people more than a thousand years ago.

In the Song Dynasty, Shen Kuo's scientific work "Mengxi Bi Tan" mentioned the word oil.

Oil was also used in the Han Dynasty, and there was no technology to refine oil in this era.

Large-scale refining of oil in this era is unlikely, if it is done in small quantities.

It is still possible to use the simple method, but the amount of charcoal or coal consumed is very large.

It will even cause environmental pollution, and the air environment in this era is still relatively good.

"In the afternoon, you go to the Shang Fang Department and see if you can build the hot air balloon you said in a few months. And the artifacts you offered, see if you can make some? ”

"The minister did his best, but the minister thought that the artifact was not easy to make. This will waste a lot of time, human, material, and financial resources, and I ask for your Majesty's understanding. ”

Liu Zhengchen listened silently on the side, she felt comfortable, this was a problem for Liu Zhang.

The manufacturing technology of this era can't make guns at all, if he makes a hot air balloon.

It's still possible, Liu Zhengchen doesn't know what to say.

"Do your best, if the artifact can't be made. With your cleverness, you might be able to craft other powerful weapons. ”

Liu Che didn't have to let him build the gun, but the range and power of the bow and crossbow needed to be improved.

If it can cause greater casualties to the Xiongnu, it will reduce the loss of manpower, material and financial resources for the Han Dynasty.

If an arrow can kill the enemy with one hit, it is definitely worth it.

If the range and power of the arrows of the bow and crossbow were like bullets, the bows and crossbows of the Xiongnu would not be able to shoot the Han army.

"When it comes to March, I will let you go with the envoys to Korea. Before that, you'll need to improve the range and power of your crossbow. ”

This is the task that Liu Che arranged for Liu Zhang, and I believe that he can improve weapons such as bows and crossbows.

Through the weapons used in the war against the Xiongnu over the years, the problem of weapons was also discovered.

The craftsmen are constantly making improvements, but with little effect.

Liu Che's eyes fell on the Lingnan region, which he believed would also pose a threat to the Han Dynasty.

At present, the main forces and materials are invested in the fight against the Xiongnu, who are the number one threat to the Han Dynasty.

After cleaning up the Xiongnu, they will pack up the surrounding areas and go abroad, so that they can surrender to the Han Dynasty.

Some ministers did not approve of his long-term use of troops against neighboring countries, and the country's finances were huge.

Liu Che will not give up easily if he does not achieve his goal, how can those ministers understand his intentions?

Those ministers only thought about their own petty interests, and the Han Dynasty fought foreign wars for a long time.

As a result, the interests of some people have been affected, and they are naturally somewhat dissatisfied.

The minister's opposition was small and not high.

They knew very well that Liu Che was the emperor with real power, and he was determined to destroy the Xiongnu.

"Sooner or later, the Xiongnu will be destroyed, do you think that after the Xiongnu are destroyed. What impact will it have on Dahan? ”

Liu Che asked Liu Zhang and Huo Quai, and he already had the answer in his heart.

"The Xiongnu were powerful and controlled other countries. Other nomadic peoples looked down on the Xiongnu, and the Xiongnu were currently very united. ”

Liu Zhang expressed his opinion, if the Xiongnu were destroyed.

The most likely to rise is the Xianbei tribe, which is currently one of the tribes of the Xiongnu.

"If the Xiongnu are destroyed, the Xianbei tribe is very likely to rise. The minister fought with the Xiongnu many times and also encountered the Xianbei tribe. They fought bravely. ”

Huo Qubing followed Wei Qing to fight against the Xiongnu and met the Xianbei tribe.

They are currently very loyal to the Huns, they are like a pack of wolves.

When facing the enemy, they will surround them, and the Xianbei people are even proud of dying in battle.

For Huo Qu's disease, there is nothing to be afraid of. Destroy the Xiongnu, and then destroy the Xianbei tribe.

"If both the Xianbei and the Xiongnu are exterminated, other nomadic peoples will rise. Unless they are all wiped out, this is only a temporary way for the Great Han to eliminate the threat. ”

Over time, people from other places migrated to the northern steppes.

It would pose a threat to the Han Dynasty unless it could firmly control those places for a long time.

Building a city on the steppe requires a lot of manpower and material resources.

The current financial situation of the Han Dynasty may not be able to control such a large territory.

In ancient times, the size of a dynasty's control over territory depended on how productive it was.

For example, food production, transportation, economic development, and population, the upper limit of the population that can be maintained is more than 60 million.

If it weren't for Liu Zhang's high-yield crop seeds, according to the original grain production.

It can barely feed about 50 million, unless food production increases even more.

to feed more than 60 million people and want to control remote areas.

It would have to be transported from the interior of the Han Dynasty, because some remote areas were not suitable for growing grain.

If you only rely on rainwater to irrigate your fields, you will get very little food production, and it is better not to plant the land.

"The Xiongnu can not be destroyed, but the threat of the Xiongnu to the Han must be eliminated. The Xiongnu could also suppress other tribes and allow them to rise a little later. ”

Liu Zhang felt that the strength of the Xiongnu was weakened, and the Xiongnu were used to contain the rise of other nomadic peoples.

The Han Dynasty could strike at those Xiongnu who did not submit and win over the Xiongnu who submitted.

Let the Xiongnu forces fight each other and confront each other, and the Han Dynasty just needs to wait and see what happens.

Liu Zhang also cautiously stated his opinion, which was also not mentioned in the Honghou Mansion.

Because he didn't think of it at the time, take this opportunity to add.

Huo Quzhi and Liu Zhang analyzed the Xiongnu very thoroughly, and one was a traverser.

One is a military genius, and they have voiced their opinions one after another.

If the Xiongnu Shan Yu were here, he would definitely give them a big thumbs up.

They were analyzed so thoroughly, from population to economy to material supply.

I have thought of some of the strategic guidelines of the Xiongnu, and since the analysis has reached this point.

The next step is to take corresponding measures against the Xiongnu to make the Xiongnu suffer even greater losses.

It will take a few years, and at the moment the Huns are united.

First send people to infiltrate the Xiongnu, so that there are contradictions within the Xiongnu.

Let the Xiongnu tribes be divided, and this plan will be carried out in March and April.

Liu Che had already selected a few people, and the two of them were very satisfied with the analysis of the Xiongnu.

This is indeed the case with the Xiongnu now, depleting the population of the Xiongnu little by little.

cut off other supplies to the Xiongnu, especially grain and war horses.

The place where the Xiongnu were located was not suitable for growing grain, so it was better to find a way to make the Xiongnu have no food to eat first.

The war horses of the Xiongnu have no food to eat in winter, and the war horses will not be fat and strong.

The advantages of the Han Dynasty were even more obvious, the sooner the Xiongnu were eliminated, the less the national strength of the Han Dynasty would be consumed.

Because the longer the foreign war, the more the country's resources are consumed.

At present, the situation of the Han Dynasty is not bad, and it will be another decade or two.

Due to the long-term war against the Xiongnu in the Han Dynasty, the people were miserable.

At noon, Liu Che left Liu Zhang, Liu Zhengchen, and Huo to eat sickly.

Liu Zhang could see that Liu Che was very fond of Huo Quzhi, which made him feel envious.

Madame Wang came to the palace where the banquet was held, and it was just a family banquet.

Liu Che let everyone feel free, and wine was naturally indispensable at the banquet.

Liu Che took into account Liu Zhang's young age and let him drink less.

Everyone drank rice wine, which was the favorite type of alcohol of the Han Dynasty.

The rice wine has a low degree and tastes slightly sweet and tastes good.

The brewing of baijiu has been mastered in the court, and baijiu is generally drunk at large banquets.

During the banquet, Mrs. Wang asked Liu Zhang if he still had a makeup set.

Today, seeing the delicate women's watch brought by Princess Pingyang, Mrs. Wang also wants a women's watch.

Liu Che heard Mrs. Wang mention the lady's watch, and saw it in the Honghou Mansion.

At that time, I didn't have much interest in this thing, so I didn't ask Liu Zhang.

Mrs. Wang mentioned it today, since he likes it.

Then you can ask where did Liu Zhang buy it from? Then send someone to procure.

Liu Che guessed that this might be Liu Zhang's idea, he can always come up with some novel gadgets.