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

The moment Liu Tan thought of coal tar, his first thought was that his candles had a way out.

What candles lack most is paraffin, and paraffin is extracted from petroleum.

Another name for coal tar is artificial petroleum, which can basically be used instead of petroleum, which means that many things can be decomposed from coal tar.

But he quickly realized that with artificial oil, why are you still staring at candles? Candles can be said to be one of the most inconspicuous products!

There are many things that can be extracted from artificial oil, such as moth balls for insect repellent, pesticides, and the most familiar thing-asphalt.

Of course, there are other things, but Liu Tan is not a professional after all, so he can't think of the rest, and can only do it step by step through experiments.

Asphalt is the most useful here, it is waterproof and moisture-proof, and it is very useful for paving or doing other things.

After getting excited, Liu Tan felt a little nauseated by the smell, and suddenly remembered that kerosene is a strong carcinogen, so he waved his hand quickly: "Take it down first, don't throw it away, these things have an important effect."

Bi Gao was a little puzzled, isn't this the product of burning coal?

But he obediently asked people to save these things, turned to look at Liu Tan and asked, "Your Highness, what should we do next?"

Liu Tan said: "There is nothing to do, let's treat those people at all costs."

As a result, as soon as he finished his sentence, news came from over there: two of the four died, and those two were unconscious.

Liu Tan is silent. In carbon monoxide poisoning, coma means that he has been severely poisoned. If this situation cannot be treated in time, it will easily cause problems in later generations, let alone this era.

He sighed and said, "Buy them well, and give their family some pension."

These people are all his slaves. In fact, even if they die, they don’t need to worry about them. The master has the right to life and death over the slaves, but he is soft-hearted. When he thinks that the people who were fine just now are gone in a blink of an eye, he can’t help but feel a little depressed.

After a while, someone sent a message saying that the emperor had returned to Longevity Palace accompanied by Lu Xuan.

Liu Tan remembered that he had just sent a message to Liu Che. In order to reassure Liu Che, he rushed directly to the Longevity Palace.

After meeting Liu Che, Liu Che asked him, "Didn't he poison you?"

Liu Tan smiled wryly and said, "No, it's just a misunderstanding. When coal is incompletely burned, it tends to produce a poisonous gas. It must be ventilated. In the end, they closed the door too tightly, and something happened."

Both Liu Che and Lu Xuan heaved a sigh of relief. When they guessed that it was the Huns who poisoned them, they wondered if the Huns were going to do something again just two days after being honest.

Although the issue of the mutual market has been negotiated, how can the psychopath in Wushilu use ordinary people's thinking to speculate?

Maybe he is seeking the mutual market while going south to plunder.

Liu Che wasn't afraid, but Lu Xuan was worried that if the Xiongnu really came, even if they didn't hit Shuofang City, Liu Che would be desperately stopped if he wanted to come to the northern border country again in the future, right?

After all, it is too dangerous here.

From Lu Xuan's point of view, he doesn't really want Liu Che to come over, because once Liu Che comes over, he basically won't have time to be alone with Liu Tan.

Finally got a little bit, and was caught, even Lu Xuan left a little psychological shadow.

However, the benefits that Liu Che brought to Liu Tan by going to the northern border country are also visible to the naked eye. The most important thing is that there are only two of them, father and son, not as crowded as Chang'an. Benefits measured in money.

Now he could finally relax, turned his head to Liu Che and said, "I'm going to get you back."

Liu Che nodded: "Go."

Liu Tan watched Lu Xuan leave, and said strangely, "What did Ah Xuan send someone for?"

Liu Che paused. Hearing that Lu Xuan was not called Wusun Wang Xiao Kunmi, he didn't know what it was like for a moment, but he still said: "After you leave, he will send someone to check if there are Huns ambushing nearby."

After hearing this, Liu Tan secretly memorized it but didn't say much.

Then he heard Liu Che ask again: "Is the glass still burning?"

Liu Tan paused for a moment. He himself was not in the mood for the time being, and he had just died, so the craftsmen probably also had psychological shadows, so he originally wanted to give the craftsmen a few days off.

But Liu Che didn't care whether the craftsmen were afraid or not. After confirming that Liu Tan was not threatened, the first thing he thought of was whether the glass could still be burned.

After all, time is too tight, it is impossible for him not to return to Chang'an, but he wants to see Liu Tan's masterpiece as soon as possible.

Liu Tan had no choice but to say: "I was afraid that my father would worry about me, so I came here directly. I will send someone to send a message to let them continue firing."

Anyway, with the lesson from last time, let these people keep good ventilation, and tell them not to burn the glass at too low a temperature, it shouldn't be a big problem.

As for coal tar, this thing may not be properly arranged until Liu Che leaves.

Liu Che nodded and didn't push too much, but after Lu Xuan came back, he greeted the two of them to have a meal together.

Even after confirming that no one would dare to poison Liu Tan, Liu Che was still a little worried, and sent someone to Liu Tan's palace to conduct a thorough investigation. In the past few days, he asked Liu Tan to eat at his place first.

After finishing the order, Liu Che originally wanted to explain to Liu Tan.

After all, although his starting point for this move is for Liu Tan, if you think about it from another angle, it may make people think that he doesn't trust Liu Tan, and he wants to take this opportunity to investigate the northern palace, lest something happens out of his control things.

In fact, Liu Che naturally didn't have this idea. Among the many sons, he was most assured of two, one was Liu Ju and the other was Liu Tan.

Because of this, he didn't care about explaining to Liu Tan.

As a result, as soon as he was about to explain, he saw Liu Tan staring at the fish that had just been served on the food table, and it seemed that he didn't take Liu Che's order to heart at all.

Liu Che: ...

For a moment, he didn't know whether to be relieved or angry. He gave such an important order, but in the end, he was not as good as a fish in Liu Tan's place?

Liu Che raised his chin slightly and asked, "Tan'er likes to eat fish?"

Liu Tan looked up at Liu Che and said with a smile, "No, I just think this fish looks familiar. Are they the ones that Father caught with his own hands?"

Liu Che didn't know what was so happy about being poked, Long Yan said joyfully, "Exactly, I specially ordered someone to burn it here, let's try it."

Liu Tan was a little worried when he heard it, and he responded with a smile, while turning his head to look at Miao Rui, Miao Rui immediately took advantage of Bu Cai's opportunity to bend down and get in front of Liu Tan.

Liu Tan whispered, "Go and ask if these fish were caught from that oxbow lake."

If so, he really didn't dare to eat it, and even tried to find a way to make Liu Che not eat it.

Originally, he thought ice fishing was just for fun, but he didn't think Liu Che would really eat it, but he actually asked the dining room to do it?

Liu Tan is not good at all. Although it is wild and natural, no one can guarantee that these fish are not sick, so dare to eat them?

Miao Rui backed out, and Liu Tan symbolically picked up a few chopsticks and put them in the bowl without moving.

After a while, Miao Rui sneaked back and said: "His Royal Highness, I have already asked you clearly, the dining room replaced these few fish with other fish."

Liu Tan suddenly breathed a sigh of relief, fortunately, the dining room is also afraid of death.

He looked at Liu Che who was eating happily, and after thinking about it, he decided not to tell him, and let him continue to be happy.

Probably because the fish he caught had a sense of accomplishment. Liu Che ate a lot, but in the end he said, "It would be nice if the fishy smell was less."

Liu Tan thought for a while and said, "Then Erchen will ask them to study new methods."

Liu Che was curious: "Can you still cook fish?"

Liu Tan said: "I don't know how to do it, I just know a few recipes."

Ever since he found out that no matter what he took out, Liu Che could make up his own mind and justify his reasoning, Liu Tan became more and more unscrupulous.

Anyway, he didn't need to rack his brains to explain.

Sure enough, Liu Che subconsciously thought of the prescription from the fairy world, and couldn't help being very curious, so he said directly: "Then I will go catch two more tomorrow!"

Liu Tan:? ? ? ?

Do you like fishing so much?Is fishing an irresistible activity for all middle-aged and elderly men?

Liu Che also added by the way: "King Wusun also caught two today, so let's follow them tomorrow."

Both Liu Tan and Lu Xuan are in a very stable mood, isn't it just being separated?It's too normal, anyway, when Liu Che is around, the two of them should not even think about making out, honestly wait for Lu Xuan to come back and talk about it.

It's just that Liu Tan didn't realize it until the next morning—even if the bag was dropped, he still had to wait for Liu Che to come back from fishing. How would he fish if Liu Che didn't come back?

So what's the point of his stay?

After Liu Tan returned to the palace, he began to think whether to ask Huo Guang about the progress of the academy or to study coal tar?

To be honest, through yesterday's understanding, Liu Tan determined that the source of coal tar is basically to burn at low temperature, and then to isolate oxygen, which is basically very similar to the low-temperature dry distillation method of later generations.

But only these points are not enough to start the experiment. This is different from before. The low-temperature dry distillation also needs to isolate oxygen, that is to say, it cannot be ventilated, so it is easy to kill people.

The most important thing is that these things are actually very harmful, not to mention the harm to the environment. Now that the living standard has not improved, it is useless to consider environmental protection. We can only try not to damage too much.

The problem with this is that most of them are poisonous objects, which can easily make people who come into contact with them sick or even die.

According to the current level of popularization of science, Liu Tan can already guess what will be said: the new kiln of the King of the North is cursed by the gods, and anyone who enters it will die soon.

In order to avoid shooting himself in the foot, Liu Tan decided to wait for Liu Che to leave, and then study it carefully when he has the energy.

Just when he was about to call Huo Guang over, Bigao hurried over with a happy face and said, "Your Highness, Your Highness, the glaze has been fired in the kiln."

Liu Tan knew that they called Glass, so he didn't care, but said happily, "Let's go and have a look."

As a result, when he got there, he saw a round, green so-called glass product outside.

When he saw the freshly baked glass balls, he suddenly thought of a slogan: XX beer, century-old yeast, handed down wheat fragrance!