Li Shimin was an industrious emperor.

It is not an exaggeration to say that he has a lot of opportunities.

Just when the little eunuch went to call Li Kuan into the palace, he listened to Fang Xuanling's report again.

"According to you, the imperial court can't do anything now?"

Li Shimin frowned, refusing to accept the facts that Fang Xuanling said.

Fang Xuanling's level of strategy has always been very high, but in the face of natural disasters, there is no good way.

"Your Majesty, the price of charcoal in the West Market has doubled. Even coal, which had not been used before, became popular, but then there were several accidents of carbon poisoning. Yesterday there was even a family of six all ......"

Coal can't be used, which is already everyone's consensus in Datang.

It's a fraction of the price of charcoal, but it's a terrible thing.

"The weather is so cold, the people have no way to keep warm, if it continues like this, something big will happen."

Li Shimin is an emperor who has come from the war, and he has a very deep understanding of the power of the people at the bottom.

Otherwise, they would not have said that "water can carry a boat and can also capsize a boat".

"At present, we can only consider asking some wealthy families to donate some charcoal and concentrate it in some charity halls to burn, so that people who have no heating methods nearby can stay in the charity halls. But this is a drop in the bucket after all, if there is a way to solve the heating problem of the people, then it can really solve the problem. ”

Fang Xuanling said that Li Shimin is actually very clear, but it is clear and useless.

"Your Majesty, isn't it simple to solve the problem of heating? Wechen has a way! ”

Li Kuan's cold voice frightened the little eunuch who brought him in on the side.

At worst, this matter is said to be interrupting His Majesty's recital, but at worst, it is suspected of eavesdropping on the secrets of the imperial court.

However, the people present obviously did not focus on the little eunuch.

"Li Kuan, Hugh is messing around, this kind of thing is something you can talk about casually."

Li Shimin was originally pleasantly surprised, but when he saw that the person who came in was Li Kuan, he immediately lowered his face.

On the contrary, Fang Xuanling felt a little like a dead horse as a live horse doctor, and hurriedly spoke: "Your Majesty, His Royal Highness the King of Chu said that there is a way to solve it, so it is okay to listen to it." ”

Fang Xuanling originally didn't have much hope, but after saying this, he suddenly thought of the recent news that had been circulating in the Chu Palace's large-scale purchase of minerals, and his originally cool heart suddenly became eager.

Could it be that the king of Chu really has a way to solve it?

Or is the so-called solution he is talking about simply contributing his own coal mines?

It doesn't make much sense if that's the case.

"Hmph, let's listen to it. If it really makes sense, I won't care about you, otherwise I will be punished for several crimes, and you will look good. ”

Although Li Shimin also hoped that Li Kuan would have a way to solve the heating problem, he had little confidence.

It's really that after so many years, Li Kuan hasn't done a few things worthy of his trust.

To be more precise, Li Kuan has never done anything that he trusts.

"Your Majesty, Fang Xiang, today's problem Weichen has also generally understood. It's nothing more than the price of charcoal rising and the supply is insufficient, and the people don't have enough heating materials......"

Li Kuan wanted to analyze it from beginning to end, but he was interrupted by Li Shimin as soon as he started, "Aren't you talking nonsense, who doesn't know that this is what it looks like, what I need is a solution!" ”

"Your Majesty, don't worry! It just so happened that Weichen brought something in, you can take a look first. ”

After Li Kuan finished speaking, he motioned to the little eunuch at the entrance of the hall to bring over the things he wanted.

Why Li Shimin is looking for himself, Li Kuan can think of it when he thinks with his toes.

So when I entered the palace, I thought about how to deal with it, but I didn't expect to meet Fang Xuanling and Li Shimin discussing the cold disaster.

It's better now, kill two birds with one stone!

"What's this black? It looks a bit like coal, but the coal sold outside is all piece by piece, which seems very different from this one. ”

Fang Xuanling is not a prime minister who does not eat fireworks in the world, and he immediately recognized what the little eunuch moved in.

"Fang Xiang, you're right, this is made of coal, but the coal used to make this thing is crushed and made into a honeycomb using a special model, so I gave it a name, called honeycomb coal."

"Honeycomb coal? It's quite appropriate, but coal is poisonous, can it be made into honeycomb to solve this problem? Fang Xuanling looked at Li Kuan a little confused.

"Fang Xiang, to solve the problem of carbon poisoning, we must first understand what carbon toxicity is, why burning coal is easy to poison, but burning charcoal is rarely recorded."

Li Kuan did not answer Fang Xuanling's question directly, but explained the problem at his own pace.

Carbon poisoning is nothing more than carbon monoxide poisoning, and in the next generation, anyone can tell why.

In fact, this is not such a profound and complex problem, but Datang lacks a systematic physical and chemical theory, and no one can accurately explain the cause of carbon toxicity.

"Don't whet people's appetite there, if you have something to say, hurry up."

Li Shimin felt that today's Li Kuan was a little different from usual, a little less impetuous, more calm, and a little bit like himself when he was young.

However, he has always been bad at expressing his feelings with his sons, and he is obviously very happy in his heart, but what he says is ......

"Whether it's coal or charcoal, it's actually the same thing that burns. However, because the charcoal is relatively loose and burned relatively sufficiently, there will be no poisonous gas that causes carbon poisoning, or there are very few such poisonous gases, and it is not easy to cause harm to people. ”

"But coal is different, untreated coal, when burned directly, it is very insufficient, it will release a large amount of toxic gas, and in winter, in order to keep warm, the doors and windows are often closed, so that burning coal is easy to appear in carbon poison."

After listening to Li Kuan's explanation, Li Shimin and Fang Xuanling both seemed to understand whether they understood or not.

But at this time, none of them interrupted Li Kuan's speech again.

"I don't know if you've noticed, the burning fire, if you stir it with a stick, the fire will get bigger."

Li Shimin frowned and thought for a moment, "This is true, in the past, when marching in the field, the fire was about to be extinguished, and the soldiers would often use wooden sticks to turn it, and the fire became bigger again. ”

"Then has Your Majesty ever wondered why this is happening?"

"Why?"

"Because it's burning more fully."

"Burn more fully?"

Seeing that Li Shimin began to be interested in what he said, Li Kuan gave the Tang Dynasty's emperor and prime minister a good introductory physics lesson.