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

Liu Tan took a deep breath and said, "Send scouts, try to find as many as you can find, and evacuate all the people in the nearby villages to the city as much as possible. The city walls are patrolling day and night, and archers are guarding in shifts!"

It has to be said that at this time, having a backbone who can order decisively and quickly can greatly improve morale.

Before Li Buyan and Wei Buyi were both stupid, Zhao Ponu was full of confidence when he left. It is a serious crime to inquire about the military situation, and Liu Tan didn't bother to ask, but just seeing Zhao Ponu like this, he was somewhat relieved.

Unexpectedly, the elite of 1000 people here didn't even attend formal training, so he disappeared!

In fact, if you analyze carefully, you can't blame Zhao Puonu, he followed Liu Che's order to go, and no one knows how he contacted Captain Zuo and what he said.

Liu Tan didn't even know who Liu Che sent to contact Captain Zuo. If he sent someone secretly, it would be difficult to say anything about the situation, but if Gongsun Ao were to contact him, it would not be surprising that Captain Zuo's affairs would be revealed. .

Because the captain, Sang Qian, is not around, most of the military power now belongs to Li Buyan and Wei Buyi, but recently the two of them also have a division of labor.

This was also because Wei Deng was among those elites, and Wei Buyi was afraid that Liu Tan would think that he was letting Wei Deng down, so he avoided suspicion.

Wei Buyi turned his head and went to assign tasks, Li Buyan was about to leave, he hesitated for a moment and then turned his head and asked: "Your Highness, do you want to send out the elite of thousands of people?"

Liu Tan said angrily: "What do a group of recruits who have never been on the battlefield ask them to do? To die? What's more, we are not going to fight the Huns now, but to defend!"

On the opposite side is Wushilu, the king of the Xiongnu, no matter how inflated Liu Tan is, it is impossible for him to feel that he is comparable to Wushilu.

He dared to venture into the Western Regions before because he had Lu Xuan's support beside him, and his subordinates were all elite soldiers. The guards at Yumen Pass couldn't be said to be elite, right?

Now he has more people to protect, so he can't rush forward anymore.

Li Buyi said in a deep voice: "Many of these people have been on the battlefield. Your Highness, after the looting last year and the subsequent construction of the city, the common people live not far from Shuofang City. They should evacuate quickly. Now it is the mines that are in danger.”

Liu Tan's heart skipped a beat and he immediately said, "Then, you take them to guard the iron mine. If you can't keep it, you won't let the Huns get it if you destroy it!"

Among these minerals, the only dangerous one is iron ore.

Coal mines are indeed very useful, but the location of the coal mines is relatively deep in the hinterland. Even the Huns may not dare to advance so deep. On the contrary, the iron mines are very close to the border, which is very dangerous.

In fact, Liu Tan originally wanted to destroy the iron mine directly, or turn it into a trap.

But after thinking about it, the Huns may not come. If they didn't come and destroyed the iron mine, they would have to clean it up after the matter subsided, which would be enough to drink a pot.

Huo Guang waited for Li Buyan to leave and comforted Liu Tan, saying, "Your Highness, don't panic, the Huns may not come to Shuofang again, even if they want to come, there will be Shoucheng City to support them."

Liu Tan thought about it too. Although Zhao Puonu was captured and his soldiers were also captured in history, the Xiongnu did not continue to fight over, and they accepted it as soon as it was good.

This time should be no exception.

The only change from history this time is that Zhao Puonu has more maps in his hands, so he should not be captured while searching for water sources, and... the general of the Xiongnu is Wushilu.

After Liu Tan thought about it carefully and felt that everything was arranged, he took a special look at the patrol situation on the city wall and felt a little relieved.

However, he stood under the city wall and looked at the city wall after thinking for a long time and said, "At night, the vision shouldn't be very good, right?"

After hearing this, Huo Guang was stunned for a moment, and said in confusion, "At night...you can't see it."

After hearing this, Liu Tan suddenly remembered three words: night blindness.

He remembered that night blindness was caused by a lack of vitamin A. In this day and age, it is already good enough to maintain food and clothing, and it is basically difficult to maintain a balanced nutrition.

The only vitamin A-rich thing he could remember so far was animal offal.

This has to be put on the agenda, Liu Tan thinks about these while thinking about how to give light.

He thought for a while, then turned his head and said: "Go, have someone make some big bronze mirrors, the bigger the better."

Everyone wondered what he wanted the mirror for, but obediently asked someone to make a big bronze mirror.

Anyway, Liu Tan has a copper mine in his hand, and the slow production of copper mirrors is generally due to the patterns on the front of the mirror and the pictures on the back.

How can the things used by the princes and kings not be exquisite?

However, this time, Liu Tan specifically ordered nothing, no patterns or pictures. The only requirement was that the mirror must be in the shape of a bowl with a depression in the middle, but it should not be too deep.

After the eight sides were finished, he specially found a night to have someone bring a bronze mirror to the city wall, divide the city wall into three equal parts, and then put bronze mirrors on the two middle positions, and put bronze mirrors in front of them. There was a big burning brazier.

Liu Tan tested it. When he adjusted the mirror up, down, left, and right, a beam of light shot down from the city wall.

After Liu Tan lay on the city wall and looked at it, he couldn't help sighing and said: "The effect is not very good, forget it, talking is better than nothing."

It's not very good compared to the searchlight, but it can be regarded as illuminating the area under the city wall.

Their Shuofang City does not have a moat, or in other words, there are not many cities with state-owned moats in the entire northern border.

Liu Tan knows the importance of the moat, but there is no such condition now, unless the water of the Yellow River is diverted, but the distance to divert it... That is not a small project, and it is not comparable to building a city.

After Huo Guang followed Liu Tan down the city wall, he said with some doubts, "Why are you doing this, Your Highness?"

If there was a real fight, the sight would not be disturbed. The Huns were also night-blind per capita, so they would have to carry torches to fight at night.

Liu Tan asked deeply: "Do you still remember how Dawan disappeared?"

When Lu Xuan attacked Dawan, he didn't use any lighting facilities. Of course, his subordinates were also night-blind. It's just that when Zhao Puonu restrained the main force of Dawan King, he was stunned by the situation of the city gate he wanted to attack. Familiar with it!

So that time, it could be said that Xiao Wusun was shot by a blind man per capita. Of course, there was light after climbing the city wall, so the most dangerous and difficult place was the distance from the station to the Dawan King City.

When Liu Tan found out at the time, he couldn't help but feel cold behind his back. He knew that Lu Xuan was crazy when he fought, but he didn't expect it to be this crazy.

Huo Guang didn't know this paragraph, after listening to Liu Tan, he couldn't help but said: "Lu Xuan is not a thing in the pool, so he may not be willing to live under others for a long time."

Liu Tan paused, and looked at Huo Guang expressionlessly: "Does Huo Xiang know something?"

Huo Guang put eye drops on Lu Xuan twice in front of him, and if he didn't notice anything, Liu Tan would admit that he was really stupid.

Huo Guang didn't feel guilty at all, instead he asked: "What is your Highness talking about?"

He looked so indifferent, but Liu Tan felt a little embarrassed about himself, and it felt a bit inappropriate to gossip about his love life with his colleagues.

He didn't speak, but Huo Guang took the initiative to mention: "Is it something that Xiao Kunmi likes His Highness?"

Liu Tan glanced at Huo Guang in horror, and found that his expression didn't change when he said this.

Huo Guang turned his head and glanced at Liu Tan, and found that the other party looked very shocked. He was a little surprised: "Why? Isn't this something everyone knows?"

Can't you see that everyone is blind?Are those things that Lu Xuan did are done by ordinary allies?

An uncontrollable blush appeared on Liu Tan's face, he turned his head and said, "No...it's nothing."

He regretted bringing up this topic now, and hoped that something could divert Huo Guang's attention.

When Huo Guang saw his blushing, his heart immediately turned cold.

He couldn't help but said in a low voice: "Your Highness, Mr. Chang'an Xiaolang is up to His Highness to choose, why do you have to ask for trouble?"

Then he heard Liu Tan sighed and said in a low voice, "No one looks better than him."

Huo Guang:? ? ? ?How good is he!