I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

As the saying goes, there are policies at the top and countermeasures at the bottom, and Lu Xuan's countermeasure is...over the wall in the middle of the night.

The first time he climbed over the wall and came in, he was almost shot into a hedgehog by the elite patrolling regiment of the Northern King's Mansion - the Northern King had the emperor's permission, and his subordinates could be equipped with hand crossbows.

Fortunately, even at night, the northern palace is brightly lit, and those people are very familiar with Lu Xuan, otherwise they might really die.

The leading lieutenant was also in a cold sweat and hurriedly asked to put down the hand crossbow, and at the same time saluted and asked: "His Royal Highness Wusun King, you...how did you come here like this?"

Lu Xuan smiled: "It's convenient, where is your Highness?"

The lieutenant looked blank: "In...in the study."

Lu Xuan replied: "You are busy with your work, I will go to see him."

After Lu Xuan left, someone on the side whispered: "Should we report to His Highness? Just let King Wusun pass like this... In case he has evil intentions..."

Lu Xuan talked to Liu about how deep the relationship between the two people is that other people can't feel. Many people even think that they are just young and frivolous for a while, so there are always some people who don't believe him that much.

The captain patted the soldier on the head and said, "What do you know? His Highness King Wusun is different."

Only newcomers don't understand how King Wusun cares about his Royal Highness, and these old people can see it.

At that time, Liu Tan was making final arrangements and preparations for the "performance program" of the Lantern Festival.

The Lantern Festival in these years was initially prepared by the crown prince, but after a fixed routine was formed, Liu Ju didn't care much about it, but this year was a bit special, so Liu Ju still asked about it.

Then he felt fortunate that he had intervened, otherwise he wouldn't have known about his younger brother's big troubles, and he didn't even have a preparatory plan.

Especially in the palace, Liu Tan also had to apply for the air cushion if he wanted it.

If it is only in the harem, then Ajiao Chen agrees, but if it is related to the platform for picking stars, then the emperor or the prince must agree.

Liu Ju made a special inquiry, and only let him go after listening to Liu Tan saying that he was making preparations for safety.

Now what Liu Tan is preparing is how big the inflatable cushion will be.

If you just rely on artificial blowing, it seems impossible to make the inflatable cushion too big. After all, who can blow it for so long without interruption?And after reaching a certain level, artificial blowing can no longer go in.

Liu Tan thought that he wanted to get a pump before, and now he just happened to get one.

When Lu Xuan came over, Liu Tan was drawing a picture of the pump. In fact, the most important thing about the pump is the material of the piston, which cannot leak and can withstand a certain pressure.

When he heard the study door being pushed open, Liu Tan looked up in surprise: "How did you get here?"

He was sure that before the curfew, he didn't get the news that Lu Xuan was going out, so he acquiesced that Lu Xuan would not come today, and he was still thinking about why he came here in the blink of an eye while Lu Xuan was not there to do something else with him. .

Lu Xuan said cheerfully: "We're close, isn't that easy? Just climb over the wall."

Liu Tan: ...

He felt that when his father chose the address of the Wusun Prince's Mansion, he must have considered according to the logic of the behavior of ordinary big man officials, but it turned out that he never expected that this man would never play his cards according to reason.

Lu Xuan came over and asked, "Aren't you sleeping so late?"

Liu Tan looked at him expressionlessly: "Didn't you also sleep? You climbed over the wall in the middle of the night."

Instead, Lu Xuan's eyes flashed with excitement: "It's quite interesting."

Liu Tan sighed and said, "Put away your excitement and let me finish the matter."

Lu Xuan leaned over to glance at the picture on the desk and asked curiously, "What is this?"

Liu Tan said: "It's a small gadget that can be used to cheer you up."

Lu Xuan was obviously at a loss, and didn't understand what it was.

Liu Tan patted his head and said, "You'll know when it's done."

Although there is no rubber these days, in fact, rubber is not necessarily necessary in many cases. Rubber is just a cheaper and easier to process substitute. Without it, it does not mean that it is difficult to move. For example, Liu Tan can use cowhide or sheepskin instead .

As long as the cortex is folded layer by layer, and then tanned by certain means, his goal can still be achieved.

Liu Tan's craftsmen are used to His Royal Highness the King of the North always coming up with something new.

The body of the air pump is made of bamboo. Later generations use metal because metal is actually stronger and cheaper than wood. After all, the level of smelting has improved.

Now...it's not for Liu Che to play with, there's no need to make it so good, the bamboo is enough.

As for the air nozzle, it is also very simple, just make it into a needle type, if there is no suitable hose, it will not be done, and it is not impossible to directly install the air nozzle on the pump.

All in all, keep it simple.

But there is still a very serious problem, that is, the air holes on the air cushion must be re-done, at least not leaking while pumping, right?

Of course, this is not difficult, as long as a piece of hard skin is added inside the air hole, the hard skin can be folded to allow the pump and soft plug to enter.

After Liu Tan tossed it out, he asked people to try it. This method is indeed much better than the way of letting people blow air.

In the midst of the intense busyness, Zhengdan arrived.

Liu Tan went into battle again, probably because of his growing stature. The winter coat that he thought looked like a ball after wearing it had become much better now. At least his height can support such a suit. up.

Under the joint care of the emperor, empress and prince, Liu Tan's grand gown was redone, which was so dazzling and eye-catching, but all these became a foil under his face.

Liu Tan originally thought that he was a wealthy and idle person in Chang'an, so during the New Year's feast, he should be able to hide in a leisurely way, eat, drink and savor all living beings.

But in fact, it was better at the beginning. In the second half, when everyone was able to move freely, Liu Tan was surrounded by people—all of them were envoys from small countries from the Western Regions, even the envoys of the Huns.

Liu Tan: ...

Careless.

He should have thought that these small countries could be regarded as neighbors with the Northern Border Kingdom—you must know that the Northern Border Kingdom has set up several Captain's Mansions and a Protectorate's Mansion in the Western Regions.

With the precedent of Che Shi Kingdom, even if they don't intend to get close to the Northern Kingdom, they still have to take advantage of this time to gain favorability with the Northern King, hoping that the moody Northern King can let them go.

Although the envoys of these small countries in the Western Regions do not have a wide range of vision, they are surprisingly sensitive in this matter.

They arrived quickly, and even the officials of the big man were stunned when they wanted to communicate with the king of the north, but they didn't find a chance!

Not to mention Liu Tan, even Lu Xuan is the same, he originally thought that he could sneak out with Liu Tan to find a place to enjoy the quiet.

Although these two people have been inseparable these days and don't care about this little time, sometimes the more this is the more exciting it is.

Comrade Lu Xuan has now learned all kinds of tricks without a teacher.

In the end, who would have thought that let alone sneaking out with Liu Tan, the two of them almost never had a chance to be alone!

Although Liu Tan is usually very rude when he mentions those small countries in the Western Regions, at this time he still wants to give these small countries face.

Of course, here he is not giving Xiaoguo face, but his father's face. This is his father's New Year's feast, so he can't make people look bad at such a banquet and make the atmosphere of the banquet embarrassing, right?

As a result, the envoys of these small countries in the Western Regions didn't know if they were mentally ill. Liu Tan became a little more kind, and all of them became more courageous, and some even wanted to seek cooperation with the northern border countries.

Liu Tan was quite speechless after hearing this. Your entire country is not as large as Shuofang City and yet you dare to boast that Haikou is cooperating with the northern border country. Don’t you think too highly of yourself?

After finally coping with this one night, let alone keeping up with the new year, Liu Tan almost fell asleep on the way back - originally the emperor and empress wanted to keep him when they saw him looking tired, but before they could speak, Liu Tan almost fell asleep. Tan just dragged Lu Xuan away.

Logically speaking, Lu Xuan already had his own mansion, so of course he had to go back to host. Liu Tan originally wanted him to go back first, but he didn't expect Lu Xuan to take everyone to the northern palace.

Liu Tan watched him bring a bunch of people over with a dazed expression, "You...why did you come here?"

Lu Xuan said: "Accompany you."

Liu Tan said hesitantly: "But... shouldn't you be watching the new year in your mansion today?"

Lu Xuan was very righteous and confident: "Our Wusun country is only Zhengdan!"

Liu Tan: ...

That's right, people are now doing as Romans do, but in fact they don't celebrate this festival at all.

Originally, what Liu Tan thought was that after the New Year's feast, he and Lu Xuan could rest for fifteen days.

But in fact, it was Liu Ju who called him every day: Brother, do you think this is okay for the Lantern Festival?

Liu Tan doubted whether Liu Zheng did it on purpose!

Fortunately, [-] days later, the Lantern Festival finally came. That night, the emperor's family was supposed to be waiting on the star-catching platform to watch the fun in a hot air balloon, but a Lu Xuan was forced into it.

When Liu Che saw Lu Xuan coming with Liu Tan, the smile on his face froze.

His pair of jet-black eyes fixedly stared at Lu Xuan, but Lu Xuan was calm and let him watch, and then... a little... rubbed against Liu Tan's side.

After Liu Tan noticed it, he turned his body slightly, blocked Lu Xuan and said, "Father, King Wusun is so lonely in Chang'an by himself, and I will let him come here to have fun."

Seeing his son's reaction, Liu Che raised his eyebrows: "So many envoys from the Western Regions are quite lonely in Chang'an."

Liu Tanli said bluntly: "What does that have to do with Erchen?"

Liu Che choked, thinking in a daze that it had been a long time since no one dared to talk to him like this.

But the one who spoke was not conscious at all, and even urged: "Father, the lanterns outside have already been lit, and the ice sculptures of my children have also been finished, let's go up and have a look."

Liu Che: ...