"Accurate to the centimeter!" Li Yun could not help but take a deep breath and began to calmly measure.
Regarding Mo Jiazi's requirement for the ruler's precision, he had a great understanding of it. The more skilled a craftsman was, the higher the requirement for precision.
A difference of a centimeter could lead to a difference of a thousand miles. This was not a simple saying, especially for a difficult project like the construction of an arch bridge. The requirement for precision in measurement was extremely high. Often, a small mistake could cause catastrophic losses. Even if a craftsman had already measured it accurately, he still had to measure it personally to be at ease and ensure the quality of the arch bridge.
One Zhang was equal to ten feet, one foot was equal to ten inches, and one inch was equal to ten centimeters. Li Yun repeatedly confirmed that he did not dare to be careless and strove to achieve incomparable precision.
"One centimeter is equal to ten centimeters!" However, when Li Yun was accurate to the centimeter, he was suddenly stunned. Because the Tang Dynasty was divided into large and small rulers, Li Yun's standard was a large ruler. Even so, one centimeter of such a large ruler was only equivalent to about three to four millimeters in the modern era. With such a short distance, it was impossible to be accurate to ten centimeters.
"Sure enough, it's not that simple!" Li Yun sighed in his heart. He knew that Mo Jiazi's question was not that simple. It was impossible to be accurate to ten centimeters. Even if it was forcefully divided, it was afraid that in the end, the ruler would be destroyed, and the scale would not be able to be seen clearly.
"Zimo said, 'The center is the same length.' Since there is no way to be accurate to every centimeter, it can be accurate to the fifth centimeter. " Li Yun had a bright idea. As long as it was accurate to the fifth centimeter, if there was a need for more accurate scale, he could estimate the closest length visually.
When he personally engraved the mark of the fifth centimeter in the middle of every inch, looking at the precise scale, his heart was suddenly filled with pride. This was the ruler with the highest precision that he had ever used.
This kind of ruler could be said to be a priceless treasure for Brother Mo Jiazi. With such a precise ruler, he could accurately measure everything in the world. In his heart, he suddenly had a feeling that everything in the world was in his heart.
"The next step is the most important one, which is to allow this wooden ruler to be controlled with one hand." Li Yun looked at the wooden ruler, which was much taller than him, and could not help but fall into deep thought. Out of the three requirements, two had already been completed. What remained was the most difficult part. How to make the ten foot long wooden ruler be controlled with one hand? Li Yun looked at the ten foot long wooden ruler in front of him and sank into deep distress.
Originally, when he held the three-foot-long wooden ruler in his hand, he didn't feel that this task was very difficult. However, when the one-foot-long wooden ruler was placed in front of him, he became serious.
To be honest, a wooden ruler that was ten feet long was very common in practical use. When measuring large objects, such a long wooden ruler was required. Originally, he didn't think much of it. However, when he considered Mo Jiazi's request, he realized how convenient it would be to make the ruler that Mo Jiazi mentioned.
"How did Mo Jiazi do it?!" However, after a long time, Li Yun still didn't have the slightest clue. No matter how hard he thought, he couldn't figure out how to make a ten-foot-long ruler the size of a palm.
"Young Master, in my opinion, it must be the Mo Family's son who is spouting nonsense. He also admitted in front of everyone that distance cannot be changed. It is impossible for a ten foot long ruler to become the size of a palm." The old servant comforted him.
Li Yun shook his head dejectedly and said, "Although Mo Jiazi said that distance cannot be changed, we can change the status quo and change the distance. If we take a long detour, we can build bridges and roads. If we take a long detour, we can increase the speed of carriages and horses, so that we can travel a longer distance in a shorter time. I think Mo Jiazi's intention is also the same! "
The old servant couldn't help but agree. He didn't know how to comfort Li Yun. After all, since Mo Jiazi gave his disciple a question, he must have a draft in his heart.
However, after a long time, Li Yun still didn't have a clue. According to the knowledge he had learned, there was no way to do it.
"It seems that I thought too highly of myself. I originally thought that I could compete with Mo Jiazi. Now, it seems that I might not even be able to beat Mo Jiazi's disciple." The more Li Yun thought about it, the angrier he became. He couldn't help but fly into a rage. He angrily threw the wooden ruler that he had made in his hand to the ground.
The wooden ruler was ten feet long and made of thin wooden planks. When it was thrown to the ground, it immediately broke into several pieces.
The old servant couldn't help but say regretfully, "This wooden ruler was painstakingly made by Young Master!"
Li Yun had spent a lot of effort on this wooden ruler. He had seen it all with his own eyes. Seeing the wooden ruler destroyed, he couldn't help but lean over and pick up the broken pieces of the wooden ruler on the ground.
There were many broken pieces of the wooden ruler. When the old servant picked up a few pieces, his hands couldn't hold them all. In the end, he could only stack the wooden ruler in his hands and continue to pick up the rest of the broken wooden rulers.
However, the old servant didn't see that when Li Yun's originally dispirited eyes accidentally saw the stacked wooden rulers, he suddenly stood up. His eyes suddenly became extremely bright.
"Hahaha, I understand. I finally solved Mo Jiazi's problem." Li Yun suddenly laughed like a madman.
"Young Master! What's wrong? "The old servant hurriedly got up and looked at the crazy young master in horror.
However, Li Yun didn't care about the old servant at all. Instead, he directly picked up a long piece of broken wooden ruler and broke it again with a snap.
Under the old servant's worried gaze, Li Yun stacked the broken pieces of the wooden ruler in his hand. The ten feet long wooden ruler was actually only as wide as the palm of his hand.
"Young Master, you mean to cut the ten feet long wooden ruler into small pieces?" The old servant suddenly realized Li Yun's intention.
Li Yun nodded proudly and said, "That's right. Although the ruler is long, it is about five centimeters thick. If we cut the ten feet long wooden ruler into half a foot long, then it will only be an inch wide. Only in this way can we make the ten feet long ruler between our fingers."
"But in this way, wouldn't it be more troublesome to use the wooden ruler piece by piece? I'm afraid it won't be accurate." The old servant shook his head. If one had to use the wooden ruler piece by piece when measuring an object and then put it away after using it, it would be very troublesome. If one accidentally moved the wooden ruler, then the length would no longer be accurate.
Li Yun laughed and said, "What's so difficult about that? All we need to do is to build a 'bridge' between the two pieces of wood and connect the two halves of the ruler with rivets. Then, we can connect them like a chain."
As Li Yun spoke, he picked up the two halves of the wooden ruler and pinched the ends with his fingers. He nimbly moved the two halves of the wooden ruler back and forth.
The old servant's eyes immediately lit up. He couldn't help but exclaim, "Young Master is indeed talented and smart. You actually solved Mo Jiazi's problem so easily."
Li Yun couldn't help but reveal a trace of pride. However, he immediately sighed and said, "There are countless craftsmen in the world who are used to using the three-foot wooden ruler. Only Mo Jiazi was dissatisfied with the three-foot wooden ruler. We all thought that Mo Jiazi was picky. Now, we know that as long as one has the heart, nothing in the world is difficult.
"Once such a wooden ruler is produced, it will definitely be a blessing for all craftsmen in the world. Young Master, please name it." The old servant said with a gratified expression.
"Since this wooden ruler can be folded, why don't we call it Folding Ruler?" Li Yun said with a thought.
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