"Yan Liben, your design drawing is simply unbearable! It's fine if you have a flat design, but it can't even reflect three-dimensional. In addition, what you explained is a bit inconsistent with the things on the design drawing and can't understand it at all. However, these are all problems in the design drawing. You should find a way to solve this design drawing so that we can see it at a glance." Jing Wen said.

Yan Liben said helplessly: "I have no choice, because this is the current engineering drawings."

"Okay, I'll draw a picture for you to see. If you look at my design drawings, you will know how bad your design drawings are." Jing Wen said.

Jing Wen immediately brought some charcoal powder and then brought some glue. There were a lot of charcoal powder in this era and it was not difficult to find. As for glue, there were naturally no chemical glue in later generations, but the Tang Dynasty had a method of using fish glue. Although fish glue was a little expensive, it was a government office. Is it still lacking?

After Jing Wen stirred the charcoal powder with fish glue, pressed it into a long strip, and then dried it on low heat after the charcoal powder. After it was dried, Jing Wen sharpened one end with a knife, and a hard pen made of charcoal powder was also made. This was due to Jing Wen's experience in helping Princess Changle make that ink block at that time, so Jing Wen did not encounter any obstacles in making this charcoal.

When everyone saw this charcoal pen, they obviously didn't know what Jing Wen wanted to do, and Jing Wen immediately started drawing on a drawing. Others didn't know what Jing Wen meant, but Yan Liben knew that Jing Wen was drawing an engineering drawing. Jing Wen found a straight thing as a drawing ruler, and then began to draw according to Yan Liben's words just now. This engineering drawing was mainly a drawing on the roadbed, and Jing Wen also drew in a three-dimensional pattern, which surprised Yan Liben.

Yan Liben never thought that drawing engineering drawings could be drawn like this. These drawings were simply three-dimensional, as if the entire project was right in front of him. Yan Liben knew that if the drawings they had drawn before, only the designers could understand them themselves, while other designers could not understand the design drawings at all. In ancient times, only designers could preside over the construction themselves, and others could not guide the construction according to the design construction drawings. This made ancient designers and contractors the same person. Because others could not understand their designs, it was difficult for others to construct according to the designer's ideas.

However, if you follow Jingwen's design, numbers are marked on it, and even the distances on each drawing, the distances, heights of the road surface, and the distances of various objects are marked with lengths. In this way, even other designers can construct according to the drawings. More importantly, the proportions of this engineering design drawings are very exquisite and the accuracy is very high. If they were drawn with brushes in the past, it would probably not be able to achieve high precision. Although Yan Liben was unwilling to admit it, he had to admit that the drawing accuracy of the brush was not as good as that of a hard pen. It seems that the hard pen was born to prepare for drawing drawings with high precision.

"Yan Liben, you can explain it according to my construction drawing, and many places should be clear at a glance." Jing Wen said.

Yan Liben saw the construction drawing made of charcoal pen and nodded repeatedly. Obviously, he knew that this construction drawing was much better than his own. If it were his own, it would probably not be able to explain it to others, because all the data were recorded in Yan Liben's own mind and could not be marked on the drawings.

"Everyone, the distance of our Changluochi Road is three twelve and eight feet. It can all the carriages and ordinary vehicles can also pass through, which can greatly clear traffic. The thickness of the roadbed is about..." Yan Liben began to continue explaining.

This time, the investors who paid the money understood the purpose of this road. As long as they combined the parameters on the drawings, they could be easily understood. In addition, Jing Wen's design drawings are very three-dimensional. Many people can see them at a glance and have a deep understanding of the Changluo Chi Road. Yan Liben was also very happy, and this design drawing made everyone understand it as soon as they were said. Usually when he explained the design drawings to others, other laymen did not understand them at all, and even peers might not be able to truly understand them. This situation is very difficult for real construction, because the construction personnel do not understand the design drawings. But now, with Jing Wen's design drawings, even these lay investors understand the design drawings, which is simply a weapon. Yan Liben knew that the construction would probably be much smoother in the future, because of these design drawings. One design drawing is enough to change the history of the entire building construction.

"Jingwen Jiedushi, thank you! If it weren't for you, I'm afraid I wouldn't be able to explain it clearly!" Yan Liben said.

Jing Wen also said: "No, they have already invested anyway. Can they not continue to invest because they don't understand?"

"You can't say that. If they spend money, I have to let them understand what they are building. Now the Cui family led them to invest. If they don't understand, there may not be a next time. Our Yan family has been doing civil engineering construction for generations, and we have met many dignitaries, but they don't understand these things. Many times, because they don't understand, a project will be blown away. Now that I have these drawings from the Jingwen Jiedushi, it will be much easier for us in the future. At that time, many projects in our world can be further implemented. How great is this good for our development!" Yan Liben said excitedly.

Jing Wen did not expect that Yan Liben had such professional ethics. Although Yan Liben is an official now, his family is still an engineering designer at heart, and they attach great importance to this kind of engineering design. If the Yan family did not have engineering design, they would probably not be valued. Although the ancient times mainly attached great importance to Confucian classics, some people still cannot do without it. This is the case with the Yan family. In ancient times, if the emperor wanted to build a large scale, he really could not do without the Yan family, the engineering and construction family. The Yan family ate this bowl of rice, but in less than a hundred years, the dynasty changed several times, they did not fall down, but became more and more prosperous. Therefore, it is very important to learn a professional technology well! (To be continued, please search for astronomy, novels are better and faster!
Chapter completed!