Fei Qian closed his eyes and recalled the instruments in the later generations, what could be both stable and change frequency?

Bearing? No...... Belt? Probably not......

That's right, it's gears!

A simple combination of size and size of the gear set can increase or reduce the speed of rotation, and the traction force is the same during the rotation of the gear, but what should the gear be called in the Han Dynasty?

Fei Qian didn't know how to express it clearly, so he simply drew a schematic figure on the ground and said to Huang Chengyan: "Lord Yue, please see, if you remake this water cone, replace all the wooden poles and stone cones with iron, and then add this to change the speed of the hit......

Fidin drew a figure of a large gear and a small gear snapping into each other......

"That's right! You can add a ratchet! Huang Chengyan clapped his hands and said. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Originally, the water cone was smashed with a stone cone through a lever, which was used to remove the husk of the crop, but now the rate is changed with the size gear, and then the easily damaged wooden rod is replaced with an iron rod and a hammer, which can be used for the requirements of craftsmen to hit the iron block at high speed.

And the ratchet, that is, the gear, was there during the Warring States period, but most people didn't know how to use it until the Han Dynasty......

Huang Chengyan is also a doer, and immediately greeted a few people and got busy. For the invention and innovation of instruments, Huang seems to have this preference flowing in his veins, and even Huang Yueying is eager to try it on the side, if it weren't for Fei Qian's still on the side, it is estimated that he would have run up to see the excitement......

At this time, a subordinate of the Huang family came to report to Fei Qian that a person from Yanzhou had come to visit, and now he had arrived in Lushan......

Yanzhou? Shanyang County seems to be from Yanzhou, could it be that Master Liu Hong sent someone?

Thinking of this, Fei Qian hurriedly explained the reason to Huang Chengyan and said goodbye.

Huang Chengyan also understood, so he asked Fei Qian to return quickly, but Huang Yueying was a little in a dilemma, and wanted to stay to see her father's tools, and felt that she had to accompany Fei Qian......

Fei Qian also understood, so he said to Huang Yueying: "Why don't you stay here first?" I'll go back alone and pick you up tomorrow? ”

Huang Yueying hurriedly nodded as if a chicken pecked rice, and then felt that if she agreed to stay so quickly, it would make Fei Qian a little unhappy, and only after carefully looking at Fei Qian's expression did she put her mind at ease and ran to Huang Chengyan's side happily.

Fei Qian said goodbye to Huang Chengyan and went back to Lushan first.

Huang Yueying stood beside her father Huang Chengyan, watching a group of craftsmen busy, and suddenly felt very happy, secretly covered her mouth and bent her eyes.

When I was a child, I sat next to my father and watched these uncles and uncles build this and assemble that, and then the toys in front of me were square, round, triangular and so on......

When I was a child, I squatted beside my father like this, watching these uncles and uncles use saws and axes to gradually change a whole piece of wood into a new shape, and then I also took my father's special small saw to squeak and sawed the wood, and for this reason, I also ground my little hands into blood blisters......

When I was a child, I stood by my father's side and watched these uncles assemble their first device according to their own ideas - a sweeping device with four brooms - although it turned out that this device was completely ineffective, it was better to sweep the floor directly with a broom......

But when I grew up, I gradually couldn't stand by my father's side like this......

I could only climb on top of the wooden plough built by my father in the backyard, lie on the wall and show my little head, and look at the ......

Huang Yueying thought of this and suddenly realized that for so many years, her father would build a new wooden plow every once in a while and replace the old one, but the place where the new wooden plow was put had never changed, it was all in the same location......

Also, I obviously have grown taller, but I have always stepped on the wooden plough and can only just exceed the backyard wall by a head, which has been the case for so many years......

My father must have known that I was leaning against the wall......

From then on, however, my father did not have to build a new wooden plow......

Huang Yueying looked at her father on the side, and saw that his temples were already gray, and suddenly felt that his nose was a little sour......

Huang Chengyan seemed to have some feelings, turned his head to look, and saw Huang Yueying standing on the side, her two big eyes were foggy, she couldn't help but be a little surprised, turned around and reached out to rub Huang Yueying's head, and said, "Yueying, what's wrong?" ”

"Hmm...... It's okay," Huang Yueying blinked, found a topic, and said, "Father...... Well, why did you take out the three volumes of armor and give them to ...... What about Ziyuan? ”

Huang Chengyan smiled, but did not explain directly, but walked over and explained a few words to the busy craftsmen, and then came back and motioned Huang Yueying to follow him back to the hall of the hidden courtyard.

After the two of them sat down, Huang Chengyan stroked the three books on the table and asked Huang Yueying, "Yueying, do you think these three books are important?" ”

Needless to say? It's definitely important. Huang Yueying nodded.

Huang Chengyan laughed, but shook his head, and said, "Yueying, it seems that you don't fully understand it......

Huang Chengyan didn't continue to explain this topic, but suddenly asked Huang Yueying again: "Do you know why I'm in such a hurry to marry you to Fei Qian Fei Ziyuan?" ”

"Because...... Ziyuan learned from Pang Gong? Ziyuan also likes to make things? That one...... Ziyuan saved me? ”

Huang Chengyan nodded and said, "There are some reasons for these, but the most important reason you didn't mention." ”

Huang Yueying blinked her eyes, and gradually shifted her gaze from Huang Chengyan to the book on the table, and said, "Father's meaning, is it ......"

"Exactly." Huang Chengyan said, "There are many young talents who have learned from Pang Gong, but it just so happens that there are not many who are interested in the way of making things, plus Ziyuan had such a fate with you before...... These are some of the factors, but the most important thing is not these, but ......"

“…… It's a legacy! Huang Chengyan restrained his smile and said very seriously, "Since the beginning of the Han Dynasty, the Huang family has inherited the secret lineage of Hu Feizi, and it has been more than 300 years...... Now that it's in my hands, if I accidentally cut off the inheritance, then I'm ashamed of the ancestors of the Huang family! ”

“…… The Huang family is not happy, you are the only one under me, every time my father thinks about this matter over the years, it is like a boulder pressing in my heart, fortunately, Fei Qian Fei Ziyuan appeared, which is very appropriate in all aspects, so I made a public statement for my father and set this family business......"

"Father...... Why have you never mentioned these things to me......" Huang Yueying thought that her father had borne such pressure under his smiling face over the years, and couldn't help but feel sorry for his father, and her big eyes were glowing......