Early the next morning, I set off with Meng He to Lishan, and there were only a few people in my entourage, unlike Yingzheng's mighty team of several hundred meters, and the driving speed was much faster, and I arrived at Lishan in about two hours. Someone had already sent someone to inform Zhang Han yesterday, so as soon as I got out of the carriage, I saw Zhang Han waiting in front of the official office.

When Zhang Han saw me getting out of the car, he immediately stepped forward and bowed down and said, "Minister Zhang Han has seen His Royal Highness." ”

I looked at Zhang Han carefully, he was also dressed in a black robe, but there were no ornaments on his waist, he was in his twenties, dignified, he had led the prisoner army to be invincible in history, and now his temperament is more like a scholar.

I stepped forward to help him up, and said with a smile: "Zuo Xiaoling doesn't need to be polite, the last time I followed my father here, I only stayed for a short time, and I didn't have too much contact with Zuo Xiaoling. ”

Zhang Han replied: "Your Highness has a good reputation. Please go to the official office to rest first, where the officials and major craftsmen have been summoned to wait for His Highness. "There was a burst of curiosity in my heart, the prince's tone seemed to know me?

If I knew what Zhang Han was thinking, I couldn't help but tell him, not only me, but many people in the future know you!

I followed Zhang Han into the Zuoxiao Mansion, which was the larger of the grass houses.

There were already more than a dozen people lined up on both sides of the room, and when they saw me coming in, they said in unison: "See Your Highness!" ”

Zhang Han and I walked to the top position, smiled and said, "You don't need to be polite, sit down." So saying, I sat down first, and the rest of the people sat down after I sat down.

"I didn't want to disturb you when I came here today, but I have the emperor's grace, and the emperor entrusted me with a heavy responsibility, so I dare not slack off at all. Please tell us about your progress and difficulties, and I will work with you to solve them. Looking at the people under the seat, I slowly spoke, the black robe on the left should be the official here, and the short robe on the right is the craftsman.

As soon as the words fell, Zhang Han was about to speak, I raised my hand and said: "Zuo Xiao's order doesn't need to be said, I will carefully review your report every day." ”

Zhang Han arched his hand and said: "Yes, then you will report to His Highness in turn." ”

A person on the left side bowed his hand and said: "Your Highness, He Qiyu, the official to whom the stone chamber belongs, the stones required for the mausoleum are all mined from the south of the Wei River, and transported to Lishan through the Wei River, and the stones required for the present have basically arrived in Lishan, and the construction has been completed nine out of ten." ”

I nodded. Then everyone reported in turn that the wood, timber, civil works, utensils, etc., were basically close to completion, but such a large project still takes a long time between the completion and completion.

Seeing that everyone had finished reporting, I looked at Zhang Han and asked, "Zuo Xiaoling, you mentioned in the report that it is difficult to move stones, which greatly reduces the progress of the project, but is there such a thing?" ”

Zhang Han arched his hand and said: "Your Highness, there is indeed such a thing. Nowadays, the weather is relatively cold, but it has not yet reached the level of splashing water into ice, and the use of rolling wood is too much loss of wood, and dozens of pieces of wood can transport a complete stone to the inside of the mausoleum. In addition, when the stone is transported from the ground to the ship and to the vicinity, it is very easy to cause the ship to sink, which greatly slows down the construction progress. Fortunately, the masonry of the four walls, columns, and roof of the main body has been completed, but the masonry on the ground is slow, and the ministers will send additional manpower to the stone transportation, so His Highness does not need to worry too much. ”

I pondered for a while, looked at the craftsman on the right, and asked, "You are all the top craftsmen of my Great Qin, I have a drawing here, I don't know if you can build it according to the drawing." ”

The leader of the person named Gong Jin, and he arched his hand and said: "Your Highness, the minister doesn't dare to say anything, can you borrow the drawings to the villain first." ”

I picked up the pen on the desk, spread out a blank scroll of books, drew a schematic diagram of the fixed pulley, the movable pulley and the pulley group from memory, and beckoned, "Come near." ”

Gong Yijin stepped forward, took the drawing in my hand, looked up at me suspiciously, and looked at me suspiciously: "Your Highness, forgive the villain for being stupid, the villain can't see what this is." ”

Zhang Han also took it and looked at it carefully for a long time, but he didn't understand what it was.

Then I called all the craftsmen over and explained to them: "

Everyone has seen it, a tool used to draw water from a well. In fact, this thing is similar to the principle of the wheel, but it can have more uses, and its name is pulley.

Look at the first picture, this upper pattern represents the wall or other places where the rope can be fixed, this round on the wall represents the fixed pulley, which means a fixed pulley, the lower pattern represents what we want to pull, such as stone, wood, etc., and the thin thread that connects the lower pattern is the rope, and the other end of the rope is in the human hand.

Suppose we want to pull this stone from under the wall to above the wall, we can only stand on the wall and pull it up from the bottom. But this is very dangerous, once someone escapes, it is likely to be brought down from the city wall with ropes and stones, and although the city wall is long, it is relatively narrow, and if many people need to pull on it, they may not be able to stand on the city wall.

If with the help of this tool, we can build a shelf on the city wall, fix the pulley to the shelf, and then tie one end to the stone, and throw the other end around the pulley under the city wall, so that people can pull the stone up under the city wall, understand? ”

Looking at the thoughtful looks of the people, it is very similar to how I tried to think when I was asked by the teacher in class, "Do you understand?" I asked Zhang Han to find a small piece of rope and a short piece of wood, and roughly demonstrated the working process of a slide wheel, but I didn't expect Gong Jin to be the first to react: "Your Highness, this villain seems to have heard from his father that someone used this method when Wei attacked the Song Dynasty, but with all due respect to the villain, this method has not been directly pulled up on the city wall to save effort and convenience." ”

Zhang Han frowned, and was about to speak, when I raised my hand to stop him and said, "You can speak freely, it's okay." I wonder who your father is? ”

Gong Yi Jin bowed his head gloomily, and then raised his head slightly proudly: "Your Highness, the villain's father is unknown, but I am a descendant of the Gong Lose class." ”

I nodded and smiled: "No wonder, I just showed you the general principle, in fact, this wood cannot be used directly like this, but has to be processed into a disc shape, and the edge of the disc must be carved with grooves." ”

After that, I asked Zhang Han to fetch a piece of soil, refused Zhang Han to do it for him, I took the dirt and pinched out the general appearance of the pulley, and then said: "This is what the pulley looks like, but it needs to use stronger materials, I don't know how your iron smelting technology is, it is best to use iron to make it." ”

Then I explained to everyone the principle and use of movable pulleys and pulley blocks. Gong is still the one who understands slightly better among the people, but he still doesn't understand it very well.

Seeing that everyone was pondering, I put down the things in my hand and said to everyone: "You can take back the drawings and models and think slowly, and if you have any questions, you can come to me at any time, and I will stay here until Shenshi." ”

After hearing this, everyone thanked them and retired in turn.

I'm going to have a good chat with Zhang Han in the next time.