In the Tai Chi Hall, Li Shimin and Fang Xuanling stared at Li Kuan lit the honeycomb coal stove with fire squeegee.

After hearing what Li Kuan said just now, they had a simple understanding of the situation of honeycomb coal. Now it depends on whether the facts are the same as what Li Kuan said.

"Your Majesty, the first time I use a honeycomb coal stove, I need a little charcoal or other flammable things to help ignite the honeycomb coal. Then I just need to replace it one by one after the honeycomb coal is burned."

Li Kuan used honeycomb coal when he was a child. This kind of cheap thing was used in many rural areas even when Li Kuan traveled through time.

"According to what you said, isn't honeycomb coal burning all the time? It's too wasteful, right?"

Li Shimin can be regarded as a frugal emperor, at least in his early years, Li Shimin was like this.

So after hearing Li Kuan's words, his first reaction was to waste.

"Your Majesty, you're asking for it."

Li Kuan put his hands on the honeycomb coal that began to turn red, answered Li Shimin's question slowly, and flattered him gently.

"If a general stove is not turned off and burns, it will definitely waste materials, and even waste more than used. But did your Majesty notice that my honeycomb coal stove has a different place from the ordinary stove."

"What's the difference? Apart from the slightly strange shape, I can't tell how different it is from a carbon furnace." Li Shimin circled around the honeycomb coal stove and looked at Li Kuan with some confusion.

"There is not much difference, but did you see this small iron piece?"

"Small iron sheet? Are you talking about this thing? What's the use of it?" Li Shimin saw that there was a round iron sheet under the entire furnace, that is, one of the sides.

"Yes, it's wonderful here." Li Kuan showed a smile that suited the expectations of society. "When I explained the carbon poison just now, I mentioned the principle of combustion. If this burning object cannot be fully in contact with the air, it will not burn sufficiently, or even not burn..."

Before Li Kuan finished speaking, Fang Xuanling suddenly slapped his head, "I probably understand. Could this small iron sheet be in contact with the air in the vacant honeycomb coal? When it needs to be used, open it to allow the honeycomb coal to burn fully; when it does not need to be used, cover it so that the honeycomb coal will not burn as much as possible, so that the honeycomb coal can become more resistant to burning."

After Fang Xuanling said this, Li Shimin quickly understood, "So, this honeycomb coal and honeycomb coal stove are really good things, and they are very suitable for every household to use. By the way, is this honeycomb coal expensive?"

"Your Majesty, the cost of this honeycomb coal is very low. An ordinary craftsman can process two thousand pieces a day. Including the coal mine excavation and crushing personnel in front, one person can produce more than five hundred pieces on average. Therefore, Weichen believes that five honeycomb coals per cent are a relatively suitable price."

Li Kuan likes money, but he is not the kind of person who can take advantage of the situation for money.

In Chang'an City and even Guanzhong Road, heating materials are very needed during this period. If there is cheap honeycomb coal, at least most of the problems can be solved.

"Five pennies per cent? His Highness, the ordinary family of five, probably how many honeycomb coal is needed in such weather?"

Fang Xuanling looked at Li Kuan nervously, afraid of hearing a very high number.

If honeycomb coal is able to enter thousands of households, it must have cheap and easy-to-use attributes, otherwise it will be useless no matter how good it is.

Li Kuan: "In this kind of weather, if you stay at home all day, heating will consume more coal, which will cost about ten honeycomb coal; if you save some money, seven or eight will do it."

Li Shimin: "Is it just a simple heating or does it involve cooking for two meals a day?"

You read that two meals a day.

In the Tang Dynasty and even most feudal dynasties, ordinary people had two meals a day.

The so-called work at sunrise and rest at sunset is not a saying for ordinary people that there is no lunch.

At most, it is during the busy farming season, and it will be slightly thicker for two meals in the morning and evening.

"Of course, it does not contain it. In fact, when using this honeycomb coal stove, it is often both heating and heating. Put an iron pot on it and fill it with water, which does not delay heating or boil water. Similarly, it is very convenient to use stew or eat something."

Judging from the appearance of Li Shimin and Fang Xuanling, it seems that they are intended to promote honeycomb coal on a large scale. Li Kuan naturally wants to seriously introduce the advantages of honeycomb coal.

The various things sold by his palace are also counting on the mines outside the city to turn into mountains of gold and silver so that we can buy them back.

"If the weather is not cold, how many honeycomb coal is needed for ordinary people a day?"

Fang Xuanling had already made up his mind. It seemed that there was a way to correspond to this late spring cold. At this time, he began to pay attention to longer-term things.

It is worthy of being a perfect appearance throughout the ages.

"If ordinary people simply cook, three or four honeycomb coal a day is enough, and it may be more cost-effective to have two or three pieces."

Fang Xuanling silently calculated the calculation in his heart.

If you spend two or three yuan a day, it will only cost half a penny, and a month will only cost more than ten yuan.

It is naturally not a small number when it is placed with the mountain people. They chop wood very well, and there is no need to use honeycomb coal.

But for people in Chang'an City, whether they buy firewood or charcoal, they need more than a dozen cents a month. Now honeycomb coal is convenient and cheap, and there is no reason not to be unpopular.

"Your Majesty, outsiders have many misunderstandings about His Highness the King of Chu. Even the weak ministers did not understand the King of Chu's talents before. The coal mines outside the city had already started to be mined during the former Sui Dynasty, but until now, His Highness the King of Chu has truly played its role. This is a real turning waste into treasure, benefiting the country and the people."

Li Kuan solved the things that Fang Xuanling had been worried about recently, so he naturally didn't sting a few words of praise.

"This Kuan'er finally did a serious business. But Wuji has misunderstood this time, and the nobles in the entire Chang'an City have misunderstood."

Li Shimin had no smile on his face, but he felt satisfied.

"The coal mine was sold for 30,000 guan. The Changsun family thought it was sold for a good price. If someone wanted to buy those coal mines in a few days, Weichen probably thought that His Highness, the King of Chu, might not be willing to sell it."

Fang Xuanling smiled and looked at Li Kuan.

"Xuanling, don't praise him, otherwise he might do something unreliable. The most urgent task is to immediately increase the production of honeycomb coal and let the people of Chang'an City use honeycomb coal in the shortest time!"

As soon as Li Shimin said, Li Kuan seemed to see countless copper coins coming to the Chu Palace, counting them inexhaustible and use them inexhaustible.
Chapter completed!