Honeycomb coal first has to have a furnace, the furnace is actually very simple, use yellow mud to make gall, wrap the log in the middle and enclose it with iron sheets, there are iron bars below, the bottom is exposed, and the yellow mud is dry and the middle log is drawn, the coal is also simple, it is crushed and mixed with a little clay to make a mold with wood, but the proportion still needs to be experimented, as for the pure, it is not that there are so many prisoners, Feng Daiwen told the craftsman what to do basically, and asked Chen Hu to take people to the military department to ask for hundreds of prisoners to be put on trial production,

The next morning the palace pulled a few carts of cotton, cotton is a good thing, both warm, and cheap, as for the cotton seeds are also very simple with two more logs, covered with thorns, a left and a right turn, cotton from the middle will be thorns to catch the cotton, this is the first course, processed a brush with a hard brush is to make simple, convenient, but quite labor-intensive, but this era of manpower is worth it? It's worthless, and manpower is nothing compared to food warmth, you must know that there are no longer a few people who starve to death and freeze to death a year.

These Feng Daiwen only need to tell the craftsmen what to do basically, the craftsmen will do better, there are many excellent craftsmen, there were not so many tools in the past, only with eyesight, and the items made by hand are better than those made by modern machines,

It only took half a day for the craftsmen to make a sample that satisfied Feng Daiwen, with enough manpower, simply processed the cotton, and made 50 or 60 catties to remove the cotton seeds, as for making the cotton fluffy, Feng Daiwen remembered that when he was a child, someone in the village was often invited to carry a huge bow-like thing, spread the cotton on the bamboo mat, and beat it with a small wooden hammer to make the bowstring jump up and down, drive the cotton, and slowly the cotton will become very fluffy. Because Feng Daiwen wanted to let Li Shimin see the sample before going to Shuofang, this person would only take it to heart if he knew the benefits.

"Master Hou, Taishi ordered Yuan Daochang to come to visit" The next day, Feng Daiwen was happily fiddling with saltpeter on the stone table in the courtyard, recalling the experiment done by the middle school physics teacher, putting saltpeter into the water basin, and putting a bowl of water on the top of the water basin, and after a while, the water bowl began to come out of the cold, and when he heard Ma Zhou speak, he threw a piece of saltpeter in his hand into the water basin,

"Poor Daoist Yuan Tiangang has seen Hou Ye", I saw Ma Zhou with an old man in a Taoist robe standing outside the pavilion, the old man with Buddha dust on his back, and was performing Taoist salutes with one hand.

"Dao Chief, please sit down, I have heard the name of the old immortal for a long time, and I am really honored to see it today", Feng Daiwen was stunned, Yuan Tiangang, this is really a long-standing name, the legendary land immortal,

"Lord Hou is polite, it's just that the world is spreading falsehood, the old Taoist is just an old Taoist, and he doesn't dare to call himself an immortal" Yuan Tiangangyun said lightly:

"Haha, Yuan Daochang came just in time, I picked good tea in the palace yesterday, and I just happened to comment one or two" Feng Daiwen invited Yuan Tiangang to drink tea with a little apprehension, really worried that Yuan Tiangang would see that he was coming from the future, after all, he could be regarded as borrowing a corpse to return his soul.

"Haha, Lao Dao has a mouth, yesterday Lao Dao entered the palace to calculate a good day for Hou Ye and the princess, the queen gave a cup of tea, Lao Dao drank it to know that it was newly developed by Hou Ye, originally Lao Dao was cheeky to ask for it, but the mother said that she didn't like it, and she was all taken out of the palace by Hou Ye," Yuan Tiangang smiled happily:

"The Taoist chief calls me Weiguo, Dai Wen can do it, but you can't call Hou Ye, you can't afford it" The corners of Feng Daiwen's mouth twitched, didn't he just take some tea back, he was reluctant to give it away, let himself send it, this eldest grandson really deserves to be Li Shimin's good housekeeper.

"The sage asked Lao Dao to find a group of Taoists yesterday and said that he wanted me to preach Taoism, and the sage said that it was the idea of defending the country, but in fact, today Lao Dao came to ask what the specific constitution of the country was." Yuan Tiangang asked:

"I see, this matter is indeed what I proposed, Taoism has a long heritage, this time I want to ask the Taoist chief to select a group of Taoist people who can speak the Tao, and preach among the Tang Dynasty captives and the various ethnic groups who have taken refuge in the Tang Dynasty, but they can only pass on myths and legends and guide people to goodness, as for the Taoist policy of governing the country and securing the people, those can not be passed on", Feng Daiwen said while making tea for Yuan Tiangang and Ma Zhou. Then he took three large bowls and filled them with tea, and put them on top of the salted water.

"Well, Lao Dao understands what he means to defend the country, and when Lao Dao goes back, he will gather people," Yuan Tiangang said:

"But Dao Chief, Dai Wen has a suggestion that I don't know if to talk about it or not" Feng Dai Wen hesitated for a moment:

"It's okay to talk about it", Yuan Tiangang took a sip of tea and said:

"I have many Chinese myths and legends, but they are not systematic, such as Pangu opening the sky, Nuwa creating people, Nuwa mending the sky, Houyi shooting the sun, the god of water, the god of fire, to the heavenly court, the Jade Emperor, etc., the Taoist chief will see if he can gather people of the Tao to write a source for my Chinese immortals, and the most important thing is to turn the faith immortals of the surrounding ethnic groups in the Tang Dynasty into my Huaxia exiles, so that they and we are a family" Feng Daiwen said:

"Okay, okay, why didn't I think of it," Yuan Tiangang became more and more excited as he listened to Feng Daiwen's words, and finally couldn't help but stand up and walk around talking to himself:

"Weiguo, you must have thought about it a long time ago, tell me" Yuan Tiangang excitedly pulled Feng Daiwen's arm and said:

"Don't be in a hurry, please sit down, it's hot, drink a cup of herbal tea and calm down" Feng Daiwen pulled Yuan Tiangang to sit down, took out the tea in the basin and handed it to Yuan Tiangang:

"This, wasn't this hot tea just now? Why is it frozen," Yuan Tiangang took the tea bowl and was taken aback and hurriedly asked: It turned out that Yuan Tiangang saw that the top of the tea bowl had turned into thin ice.

"Oh, it's saltpeter in the water, it can absorb the heat in the water, so it's not uncommon for it to freeze," Feng Daiwen explained:

"Oh, I see, I was scared of the old way, and I thought that the Wei Dynasty would be a spell" Yuan Tiangang replied to the appearance of the fairy wind dao bone again:

"Many of the discoveries made by the Taoists are useful, but they are not discovered in depth, and in my opinion, the Taoists are the best chemical inventors," Feng continued.

"Wei Guo is a Taoist priest who talks about alchemy?" Yuan Tiangang frowned and asked:

"Yes, please also ask the Taoist chief to help me find some Taoist priests who love alchemy" Feng Daiwen said to Yuan Tiangang:

"It's easy to deal with people, but Wei Guo, you are young, you can't indulge in Danshu" Yuan Tiangang persuaded,

"Thank you for the reminder, but please rest assured, I know that the ore alchemy pill is actually poisonous, and I won't go to the alchemy, but I have other plans, and there is one more thing to trouble the Daoist," Feng Daiwen said with gratitude:

"Why bother to defend the country, but it doesn't hurt to say it, the old way does his best" Yuan Tiangang was relieved when he saw that Feng Daiwen said clearly.

"I would like to ask the Taoist chief to ask the Taoist chiefs in the world if anyone knows that there is saltpeter and alkali ore there," Feng Daiwen said:

"Well, Lao Dao will ask those who like alchemy, but Wei Guo should quickly talk about your understanding of the mythological system" Yuan Tiangang couldn't help but ask: After all, Lao Dao has been working hard for the revitalization of Taoism all his life, and now he is on an equal footing with Buddhism, seeing that the opportunity to revitalize Taoism is in front of him, it is not easy to calm down and chat with Feng Daiwen for a while. I don't even have time to taste my favorite tea.

"That's a long ,,,,,, to say."