It was already afternoon when I came out of the left-behind mansion. Wang Hong set up a banquet to entertain the two, and decided to return to Chang'an with Master Zhang.

On the carriage, Master Zhang was full of smiles and said to Wei Renshi: "With the general coming out in person, your great achievement has been accomplished." Even if you don't look at this merit, just look at the general to come forward for you, Your Majesty will not say nothing. ”

Wei Renshi said: "General Wang is so trusted by the saint? ”

Bachelor Zhang nodded and replied: "Yes, when the Jingyuan mutiny, Zhu Zhu rebelled, and the rebels invaded Chang'an, it was General Wang who escorted His Majesty all the way to Fengtian. In Mukden, he has always guarded the safety of His Majesty. Later, Zhu Zhu's soldiers surrounded Fengtian, and General Wang also guarded the left and right, until Li Zhongwu Gongshen led the army to relieve the siege of Fengtian. Then the rebellion of Zhu Zhu was quelled, and it was General Wang who escorted His Majesty back to Chang'an. It is to win the trust of His Majesty. ”

"Li Zhongwu Gong?" Wei Renshi was stunned. In the end, I still don't know enough about this period of the Tang Dynasty, and when I hear this title, I can't remember who it is for a while.

"Li Sheng, the king of Xiping County, posthumously presented the Taishi after his death, and said that he was loyal to the martial arts." Mr. Zhang explained.

Hearing Li Sheng, Wei Renshi remembered this person. One of the famous generals of the Tang Dynasty, he quelled countless rebellions and played an extremely important role in maintaining the Tang Dynasty from being divided.

"It is also General Wang's heart for the country, if he didn't see that this thing would be very useful in the army, he would definitely not come forward in person." Bachelor Zhang sighed and said, "Originally, the old man thought that if he could let General Wang play a letter and tell the heavens about this matter, he would have achieved his goal. I never thought that it would be so smooth, and General Wang would actually return to Chang'an in person to face the saint. ”

Wei Renshi thought for a while, took out a piece of paper from his sleeve, and said, "Actually, I made complete preparations last night, but I didn't expect it to go so smoothly today." ”

Mr. Zhang looked at the piece of paper and said, "This is ...... Angular bow? But how did it get so weird? The old man had never seen such a horned bow. ”

Wei Renshi nodded and said, "Yes, this kind of bow is improved by me, although it is not yet in kind, but I can ensure that it will be much less laborious and more powerful than the current bow." ”

What Wei Renshi took out was a compound bow.

In fact, compound bows have been made a long time ago in ancient China and have remained in existence for a long time.

As early as the Shang Dynasty, compound bows appeared in China, and by the Eastern Zhou Dynasty, the production technology of compound bows in China was very mature.

In the "Examination Record" of the Spring and Autumn Period and the Warring States Period, there is already a detailed summary of the composite bow making technology at that time.

In fact, unlike many people's impressions, the dry part of the bow, that is, the bow tire part, does not provide much elastic force, and mainly plays the role of a carrier or bracket. The elastic force of the bow is mainly derived from the tendons attached to the back of the bow arm and the corners on the front of the bow arm. The horn is the horn of the cow, which is made into a thin sheet and attached to the front of the bow arm when used.

Therefore, in ancient times, the compound bow was also called the horn bow, which shows the importance of the horn. A pair of good horns, the price of the top of the cow, so there is also a "cow wearing a cow" saying. The tendon is the cow tendon and is attached to the back of the bow arm.

Tendons are very good animal fibers that can withstand very high tensile forces, while horns, on the contrary, are able to withstand relatively high pressures.

When an object is bent, the inner and outer deformations of the curved arc are maximum. The greater the deformation, the greater the elastic force generated when it returns to its original shape. Naturally, however, the greater the deformation, the greater the pulling force required.

This compound bow with ribs and angles has been used from the Eastern Zhou Dynasty to modern times. It's just a compound bow in the material sense.

However, on the pattern that Wei Renshi took out, there were a few more pulleys at both ends.

These pulleys are the biggest difference between modern compound bows and ancient compound bows - the biggest feature of modern compound bows is the use of pulleys to achieve the effect of labor-saving.

The material of the modern compound bow cannot be reproduced in this era, but the pulley can be made.

By using the pulley to answer the effect of saving effort, then the same archer, can shoot more arrows, shoot farther, and be more powerful.

"When I went back last night, I stayed up all night drawing this bow. Originally, it was planned that if General Wang did not want to come forward today, I would give him this thing as another bargaining chip. Wei Renshi said: "But today is so smooth, I don't have a chance to take it out for a while." ”

"This ...... How did this bow come to be so weird? Mr. Zhang took the pattern, looked at it carefully left and right, and asked, "What are these circles for?" What's going on in this circle? ”

"Don't underestimate these circles, they allow the archer to shoot more bows, more powerful, but more energy-saving." Wei Renshi said: "I wrote how to do it, on the next few pages. After Master Zhang arrived in Chang'an, he could find someone who knew how to make a bow and try it. But you still have to keep it secret, the court can't reveal the method of production, so that others can learn to do it, and in turn deal with our Datang. ”

"That's nature." Master Zhang nodded and said, "There is no trivial matter in the army, and if this bow is made, it will be a credit." You don't know how your head grows to come up with these things. Well, with such a thing, coupled with the merits of improving farm tools, two strategies for governing the land and horseshoes, if you want to be a nobleman, I'm afraid it's really not far away. ”

"Oh? What kind of level does Bachelor Zhang think he can do? Wei Renshi asked with a smile.

"How much more do you want to do? Do you dare to ask for a county king? Seeing his greedy look, Bachelor Zhang couldn't help but smile and said, "According to the old man, I will give you a county man and you." ”

"I trust your eyesight. It seems that my title is estimated to be a county man. Wei Renshi nodded and said, "It's not bad, it's a noble status." ”

"Why are you so obsessed with honor?" When Mr. Zhang saw Wei Renshi like this, he asked curiously, "There is no real job." ”

"It is enough to have a noble privilege." Wei Renshi said: "You know the situation in my family, I am not very old, and I have no support at home, and now my family has made a wine shop, if I don't have the identity of a nobleman, I am afraid that anyone will dare to come forward and pinch it." It's not always like this time when I can turn a bad thing into a good thing. Take this time as an example, if I am a noble person, the state capital will have some scruples, and it will not help the ninth floor and a pavilion to deal with a dream building. As for the real job, I really don't want it, there are too many constraints. And I'm lazy and lazy, and if I have a real job, I'm afraid I'll make a mistake. ”

Bachelor Zhang listened to Wei Renshi's words, thought for a while, and said, "Yes, Xianyun Yehe is good." ”