Li Shimin stroked his palms and laughed: "Boy, this is a great merit." ”

Li Shimin looked up at himself and sighed: "After all, my Central Plains is an agricultural civilization, not comparable to the grassland peoples, growing up on horseback, riding and shooting since childhood, my Han family has to spend a lot of investment to train a cavalry, but except for those famous generation of generals, even the best cavalry can not be compared with the grassland peoples who have deep the cavalry shooting into their bones." Moreover, it is difficult to raise war horses in the Central Plains, and there are few horses and they are not as strong as the war horses grazing sheep on the grassland...... Gongfu really deserves to be my Tang Dynasty boy hero. ”

Yang Yang was proud for a while, and in his mind, the Tang Mo sword army swept in all directions, coercing foreign races, and the 90,000 miles of rivers and mountains returned to the Tang Dynasty, pretending to fly to the sky, and Li Shimin, who was side by side with the sun, found the idea that he was led astray by Fang Xu.

The most critical question was asked, "How will Gongfu improve Modao?" ”

Fang Xu smiled slightly: "The core of the problem is to find the source, and the so-called only from the source can the fundamental problem be solved......"

Li Shimin was impatient and interrupted: "Don't pretend to be X with me, otherwise I will beat you into a stupid X." ”

Fang Xu: "......" I wipe, learn from Lao Tzu to speak, and attack Lao Tzu, do you want Bi Lian, do you have a bit of patent awareness, no wonder science and technology in the feudal era were so backward. Of course, the protection of gunpowder technology is not included. In the current Tang Dynasty, except for His Majesty Emperor Li Shimin and Fang Xu, the inventor, if there is a third person who dares to inquire about the formula of gunpowder, even if it is his own son, Li Shimin dares to cut it alive. After all, Li Shimin is a ruthless man who even killed his own brothers.

Fang Xu, who didn't want to die, quickly omitted the nonsense of pretending to be X, and preached back to the point: "Back to Your Majesty, the Mo Dao is an iron tool, made of iron, and the evolved version of iron is steel.

History: Steelmaking production has been in place since the late Spring and Autumn period.

During the Spring and Autumn Period and the Warring States Period, the weapons made by the Chu State were famous all over the world. Historical Records? Book of Rites and Gou Zi? In the "Parliamentary Chapters", it is said that the weapon blade produced by Wan of Chu State (Nanyang, HN Province in later generations) is as powerful as a bee's sting, which must be made of steel. Iron swords are too soft to be as sharp as a bee's sting. In ancient times, the swords used by soldiers were wrought iron, and when they were fought on the battlefield, they were bent with a single stab, and they had to be placed on the ground and stepped on straight with their feet before stabbing again.

As for the Spring and Autumn Period and the Warring States Period, what methods were adopted for steelmaking production? There is no record in the literature, and it is speculated that it is the oldest method of steelmaking by the earthen method. For thousands of years, whether it is 100 steelmaking or frying steel, etc., the biggest problem in steelmaking technology is that the furnace temperature cannot reach by burning wood.

Today, the minister found coal near the copper mountain, as long as the coal has been processed and used as fuel for the furnace fire, the furnace temperature can reach a fairly high level, and the hemp steel can be smelted better than the hundred steels and fried steel.

Hemp steel is not only not easy to rust, but also has stronger toughness and hardness than ordinary steel. (Hemp steel is the best material for making guns, and there is no accurate sniper rifle without hemp.) ）

Shi Zai: The steelmaking technology of the Han Dynasty was very developed, and the prototype of hemp steel appeared, and now the problem of furnace temperature has been solved, and hemp steel can be mass-produced for the manufacture of weapons. ”

Li Shimin couldn't wait to ask: "What are the advantages of Ma Gang, which is worthy of Aiqing's admiration?" ”

Fang Xu sneered: "Aiqing, you big-headed ghost, this marquis also has a temper." At the same time, he hurriedly returned: "Your Majesty, hemp steel is an extra-high strength steel, high nickel alloy steel, and it is a steel with superior comprehensive performance of both distance and stability, with excellent rebound and durability, so that it maximizes the rebound performance of hemp steel......

Li Shimin waved his hand and said, "I don't understand what your kid said, how long will it take to refine a Mo knife you are talking about?" Seeing is believing. ”

Fang Xu said in his heart: "If I don't give you a long time, you don't know the hard work of this marquis." He said: "Back to Your Majesty, there are still many technical issues that need to be verified one by one, and it will take a month to create the first batch of samples at the earliest......"

Li Shimin interrupted rudely: "I'll really give you a month, and in a month I will see the Mo Dao you said." Why don't you get out of here, create a new Mo knife, and wait for me to invite you to dinner, I will be rewarded after the success. ”

Fang Xu was kicked out with a confused expression.