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

After Liu Che let go of his hand, Liu Tan couldn't help puffing his face in protest, and then he was slapped again—Liu Che didn't care much about his tiara, so the tiara was almost crooked.

Liu Tan was in a hurry to straighten the crown, wanting to protest but didn't dare, so he cast a classic cowardly and unconvinced look.

Liu Che naturally ignored his dissatisfaction. Liu Tan just turned his head to look at Liu Yue and said, "Your dagger has been delivered to the Empress Dowager's womb. You can play with it when you get back."

Liu Ju was a little pleasantly surprised, he didn't expect to have his share.

The following are some special things that are generally assumed to be only owned by Liu Che in the whole world. Liu Ju has long been used to this method, and even Tourmaline never thought of having his own.

It turns out that Liu Tan actually prepared a copy for him. Although it is a short sword, it is also a sharp blade that is unparalleled in the world!

Liu Ju couldn't sit still for a while, he really wanted to go back and look at the sword that belonged to him.

However, he couldn't leave yet, so he couldn't help but stroked Liu Tan's soft hair under excitement.

Liu Tan:! ! ! !You two are really father and son!

He had no choice but to straighten his crown again. As for the fallen hair... Forget it, don't care, anyway, he hasn't learned how to tie his hair until now, let him do it himself, and only a disheveled hair will be left in the end The effect is not as good as it is.

Liu Che probably also felt that his image was not good, so he asked the little eunuch to help him tidy his hair.

Liu Tan breathed a sigh of relief, and then asked someone to present the dagger that matched the sword.

It is said to be a dagger, but it is actually a paper cutter. It is used to open letters and so on these days.

However, whether it was cutting paper or opening letters, it was impossible for Liu Che to do it himself, so this thing was given to him just for fun.

Liu Che said while playing with the dagger, "Let's bring up anything else."

Bu Fan had already reported to him that Liu Tan took something into the palace, so Liu Che knew there was something else.

At this moment, he is really curious. This sword is already a rare treasure, no, it is more suitable for him than a rare treasure, but it was sent up by Liu Tan second. The better things are, does it mean that he thinks the next thing is more precious than this sword, or even the appearance of Baisteel?

After Liu Tan's messy hair was tidied up, he returned to his original seriousness. After hearing what Liu Che said, Liu Tan hesitated and said, "The appearance of that kind of thing is actually not good-looking, and it can even be said to be a bit ugly. But Erchen thinks that the tourmaline is not as valuable as it."

There is no need to make comparisons with [-]% steelmaking. When the level of science and technology develops, [-]% steelmaking can arm the army. The development direction of [-]% steelmaking is different from that of coal, so there is no need to put them together for comparison.

As far as people's livelihood and infrastructure are concerned, tourmaline is of course not as important as coal, at least not in this era.

Liu Che raised his eyebrows: "Oh? What is it, bring it up and have a look."

Liu Tan asked someone to deliver a very small lacquer box, which was black in appearance, but after opening it...it was still black.

Liu Che saw a black stone inside. This stone did not look good, at least not as good as tourmaline, but he had never seen such a pure black stone.

After observing the stone carefully, he said: "It's unique, but it can't be used as a gemstone."

Liu Tan said with a smile: "This is not a gem, but a treasure. This stone can be ignited."

Liu Che raised his head in surprise: "Ignite?"

Liu Tan nodded and asked someone to bring over his hand stove. After opening it, there were a few pieces of burning coal inside.

This coal is of course selected anthracite, but there is no coal washing equipment these days, even if it is selected, it can only be said to make the coal smoke less when it is burned.

Liu Tan sandwiched a layer of kapok in order to prevent the smoke from coming out of the hand stove, but at this time, once the kapok was opened, the smoke could no longer be filtered, and a wisp of green smoke rose straight up, indicating that the contents of the hand stove were still burning.

He asked someone to add a fire to make the coal in the hand stove burn more vigorously, and then sent it to Liu Che's imperial case.

Liu Che took a closer look and found that the black stone in the hand furnace was actually burning. Even when he picked it up with a clip, he could see flames all over the stone.

Liu Che thought of a lot in an instant, raised his head and asked, "Is this kind of stone newly discovered?"

Liu Tan nodded vigorously: "Yes, I just...discovered it by accident."

He didn't describe the process of discovering the tourmaline, he could find an excuse, or he didn't lie when he discovered the tourmaline, it was originally brought back by Wei Buyi who thought it looked good, as for how he thought of heating...he can definitely It is said that I want to remove the impurities in the stone.

But he hasn't thought about coal yet, so it can't be said that he has nothing to do and set fire to the Gobi, right?What's more, there must be Liu Che's embroidered clothes messenger by his side, but the embroidered clothes messenger usually reports things after the cause and effect are determined. Unless it is important information, otherwise Liu Tan will tinker with these things and they will not produce a finished product. Reported.

But as soon as the finished product came out, Liu Tan brought it back to Chang'an directly. Even these embroidered clothes messengers might not know that the finished product was produced, let alone what the finished product looked like.

So Liu Che may not know the situation now, but as long as he asks the embroidered clothes messenger, the lie will be exposed too easily.

Fortunately, Liu Che didn't know how to get to the bottom of things, or he had learned not to get to the bottom of Liu Tan.

This comes from his understanding and trust in Liu Tan. He knows that if he can tell, his fifth child will tell every detail without asking. Otherwise, don't ask, and there will be no result.

Liu Che asked someone to take down the stove and asked, "How is the output?"

Knowing what he meant, Liu Tan immediately asked someone to send a document and said, "I conducted some experiments, and they are all here."

From this time on, there was a serious atmosphere in the main hall of Weiyang Palace.

Liu Che was reading the record sent by Liu Tan on it, and he couldn't help raising his eyebrows after scanning it. Well, this handwriting was not written by his son at first glance, and after a closer look, the handwriting should be Huo Guang.

Huo Guang was very rigorous, and wrote all the detailed data in it, and then wrote some speculations, but they all pointed out that they were just speculations.

When Liu Che saw the end, he paused: "Honeycomb coal?"

There was obvious surprise on his face: "There are actually two more, but...why is it called briquette?"

Liu Tan quickly explained: "Because the shape is similar to a honeycomb, that's why I named it."

While talking, he asked someone to present a piece of briquette to Liu Che.

Liu Che observed carefully for a while with great interest and said, "Is the honeycomb in this shape?"

Liu Tan: ... Can his father's focus be corrected once?