Zhang Zhaohua seemed to be aware of the Yongle Emperor's thoughts, he left Gao Chi in Beiping, and sent Gao Xu to Kaiping Beibian, all of which were to examine the talents of the two, as an important reference for choosing the prince, only by making corresponding and tangible achievements, can they be used as political capital and add points in the battle for succession.

Gao Chi wants to go to the relief in person, this is a good thing, maybe this is a consistent act, because every spring, King Yan will send the three of them to observe the people's feelings, but this year, only Gao Chi still remembers, Zhang Zhaohua wrote these into the note, of course, the signature is naturally the political envoy Guo Zi and the envoy Lu Zhen.

Zhang Zhaohua supervised the production of agricultural tools in the Baoquan Bureau, and she soon discovered that the fuel used by the blacksmith to burn the stove was charcoal, not briquettes.

Zhang Zhaohua remembered that the coke used in later generations, coke is mainly used in blast furnace ironmaking and blast furnace smelting of non-ferrous metals such as copper, lead, zinc, titanium, antimony, mercury, etc., and the ironmaking blast furnace uses coke instead of charcoal, which is a milestone in the history of metallurgy, and coke is coal, which is obtained by dry distillation of coal at a high temperature of about 1000 °C.

Zhang Zhaohua vaguely remembered that Gao Chi had read a notebook of the Song Dynasty, which had mentioned the refining technology of coke, and she went back and rummaged for a long time, and sure enough, she found it, so according to the method in the book, she first built a rectangular furnace on the flat ground, surrounded by brick walls more than four feet high on all sides, and a small hole was dug at the bottom of one of the walls to connect with the bellows. When refining, the coal is heated in a closed boiler, the bellows should be pulled all the time, and after two days and nights, the organic matter in the coal is decomposed, and after the volatile products escape, the remaining non-volatile products are coke.

Zhang Zhaohua pinched a piece of coke that had been refined and threw it into the furnace, which emitted a blue flame when it burned, and it was easy to form a gray shell on the surface. She picked out this piece of coke and said happily: "It's done!"

In order for the coke to burn out, an attempt should be made to remove its ash shell in a timely manner. Zhang Zhaohua asked the blacksmiths to try to compare coke and charcoal, which is better, after these people burned the fire, they clamped an iron tool with pliers, stuffed it into the furnace, and when the iron was burned red, it was taken out and put on the iron felt to beat, after a burst of sparks, everyone invariably pointed to the coke, and sighed.

"This is the coke that Niangniang said," said the blacksmith Wang happily: "Stubborn in stone, heavier than gold and iron, but like a copper moraine, much better than charcoal stove, the fire is fierce!"

A palm-sized piece of coke can be burned for three days and nights, and when smelting metal, there is no need to smoke firewood like charcoal all the time, Zhang Zhaohua saw that this method worked, and was also very happy, and ordered to increase the excavation work of the coal mine in Kaiping, and the Ordnance Bureau and the Baoyuan Bureau began to promote the new energy of coke.

"Niangniang," Mama Qian watched Han Dong wipe Zhang Zhaohua's face, and couldn't help but say, "You and General Xue have a fight!"

Zhang Zhaohua stayed in the Baoyuan Bureau for two days, her head and face were gray, she felt that the coal miners and the ironworkers worked hard, especially gave them time to take a break for repairs, and they could take a little rest for six days.

"Xue Lu, that's really black," Zhang Zhaohua wiped his face, and then returned to his fair complexion: "I'm an impostor, how can I compare with him!"

She sat down and rested for a while, and looked at the book with relish, this book is the Song people's notes that record the coal smelting method, called "Yi Jianzhi", this book draws on a variety of materials, all fantasy miscellaneous arts, retribution for injustice, immortals, ghosts, gods and monsters, medical divination and witches, interpretation of obscenity, greed and fraud, poetry and miscellaneous writings, customs and habits, etc., all included, the whole book is divided into the first chronicles, branch chronicles, three chronicles, four chronicles, and each chronicle is compiled in the order of A, B, C, and D, a total of 410 volumes.

Although there are a variety of engraved books and manuscripts in the world, but because of the disaster of Mengyuan in the Central Plains for nearly a hundred years, many Chinese classics have been annihilated, even if it is in the palace of King Yan, it is only included in forty percent, but among these forty percent, there are records about coke, Zhang Zhaohua has read a lot, and found that there are records of agriculture and industry such as smelting metals, which can even be compared with the "Complete Book of Agricultural Administration".

"These are all good things, the crystallization of the wisdom of our predecessors," Zhang Zhaohua sighed: "How can it be lost in the change of dynasty?"

She planned to recruit people who were literate and hyphenated in the six prefectures of Beiping, and later thought about it, and selected literate people from the Ordnance Bureau, the Craftsman Bureau and the Baoquan Bureau, and copied all the cultivation methods, smelting methods, etc., recorded in the "Yi Jianzhi" and the "Complete Book of Agricultural Administration", and preached them for the people and craftsmen.

One day she was sitting and watching these people copy books, and suddenly there was a sudden shock, as if she had been struck by lightning, and she suddenly jumped up: "Repair books, repair books - when was the "Yongle Canon" repaired?"

Now it is the first year of Yongle, the emperor has not yet issued an order to repair the book, and even the Manchu Dynasty was shocked by the tragic melon vine copy, and they all held their breath and did not dare to say a word, and Zhang Zhaohua knew that in the Yongle Dynasty, there would be a glorious ceremony handed down, and the so-called prosperous era of repairing the book is exactly what it means.

Zhang Zhaohua still remembers what he said when he was eight years old, standing in the fire of the society: "Brother Yang can collect the ancient books scattered all over the world, compile hundreds of schools, and compile them into books, including ancient and modern, thinking that they will be handed down to the world——"

The parallel practice of civil rule and martial arts is the ideal of every emperor. Emperor Gao also has the heart to repair the book, but he did not repair it, and Zhang Zhaohua knew that the Yongle Emperor was determined and had the capital to repair the book, and if no one proposed to repair the book now, he as the first person to advocate it, no, it was Gao Chi as the first person to advocate it, which was not only very in line with his identity as the eldest son of the emperor, but also this was actually a way to divert attention, and the emperor's fiery murderous intent was reversed to the Wenzhi book.

In this way, Gao Chi will immediately rise to a higher height in Zuo Ban Wenchen's heart. When Zhang Zhaohua thought of this, he immediately picked up his pen and wrote on the note: "Chen Gaochi is respectful to play ......"

When Gao Xu heard that Wei's was pregnant, he immediately replied to Zhang Zhaohua and asked her to take care of him. Zhang Zhaohua flipped through the letter and read it several times, and then asked Yishu, who had returned from Kaiping, "What did King Gaoyang do in Kaiping?"

Yizha replied: "King Gaoyang is in charge of Ma Zheng in Kaiping, and he is also reviewing the grain fields of Juntunzi, which is very effective, and he has not been idle for a day. ”

Gao Chi is not in charge of Ma Zheng in Kaiping, Shanxi, Beiping, Shaanxi, Gansu, and Liaodong Xingtaifu Temples are all under his control, and he is also in charge of the military affairs in these places, which shows that the emperor gave him the capital to pay equal attention to Gao Chi.

During the Hongwu period, Zhongtun Wei was set up in Kaiping. Nowadays, the Beiping Border Guards are the layout of the left Tun Guard in the Liuhe Camp, the right Tun Guard in the military platform, the front Tun Guard in the Partial Ridge, and the Hou Tun Guard in the Stone Tower.

At the same time, Gao Xu planned to write a letter requesting the opening of the city in Liaodong, and he planned to open two places, Kaiyuan and Guangning, and planned to exchange markets with the Jurchens of Haixi and Duoyan Sanwei.

Zhang Zhaohua asked: "Has this music been sent to the General Administration?"

Zhang Zhaohua asked twice again and again, and made sure that Gao Xu was only planning to write a book, and had not yet written his plan, so he could be relieved.

She immediately revised a letter and asked Gao Xu to come back to Peking to see Wei and his unborn children in his busy schedule, and to fulfill his father's responsibilities-

At the same time, he immediately sent the notes in his hand about asking for the repair of the ceremony, providing relief to the victims, and filling in Beijing, and sent it to the General Administration Department as soon as possible. Thank you for the royal big cat, cool20, and the reward of the stars last night~~~~ Love you yo (^u^) ノ ~ yo Today, the author Jun wrote a super embarrassing place, the heroine Hedong lion roared ~~~o (∩_∩) o haha~