After the child's mind was read, the tyrant caught the male queen with a black face

Yuanruan: [That's great. After all, he has never received systematic training, so he is very talented.]

System: [That's true. After the doctor from the Du Shuisi came up with this method, many people in later generations also liked to add some materials when burning stones. Later, some people added some more materials and actually made three-in-one soil.]

Yuanruan was very surprised when he heard this: [Sanhetu? The predecessor of cement? Amazing. ]

The word "awesome" immediately made everyone look at him sideways.

Everyone couldn't help but wonder, what is mortar? What is cement? How is it so powerful?

System: [Yes. Although mortar has some shortcomings, it is better than today's glutinous rice paste walls. It is extremely strong and the building will last longer...]

Everyone was surprised as they listened: it turned out to be such a good thing!

The officials were all a little agitated, especially the doctor from the Du Shui Si who was in charge of building the canal. If Qi Yue hadn't blocked him in time, the man's focused look at Yuan Ruan would have almost exposed him.

Everyone was expecting the system to tell them the formula, but unfortunately the system only talked about the development history of cement, but did not explain how mortar was specifically synthesized.

Later, the system actually changed the subject, and the court officials felt disappointed and anxious.

The Junior Secretary subconsciously looked for the Crown Prince's location. After a moment, he realized that the Crown Prince, who was the best person to take the blame, was not there!

The Junior Secretary sighed in his heart and hesitated for a moment. Just when he was about to stand up, he heard the Third Prince's still immature voice.

The Third Prince asked, "Master, Doctor of the Waterworks Department, why does adding some vinegar make the stone easier to break?"

The doctor from the Water Conservancy Bureau looked at the Third Prince in confusion, but still answered honestly, such as how he happened to think of it, and finally added cautiously that he was just guessing it on his own and was boldly trying to verify it carefully.

The Third Prince nodded seriously and said, "Master, since vinegar can damage rocks, if the enemy army attacks the city and they use vinegar to pour on our walls, will the walls break?"

The doctor of the Du Shui Si was confused. Why would His Royal Highness the Third Prince ask such a stupid question?

He explained dryly: "Probably not. On the one hand, the soldiers guarding the city will not give them the opportunity to throw vinegar, and on the other hand, they can't set fire to it..."

The Third Prince nodded as he listened, and suddenly asked, "I see. A large amount of vinegar will damage the rocks. Is there anything that can make the rock wall stronger after adding it?"

The officials looked up suddenly: !!!

Here it comes, the familiar feeling is here!

Your Highness, has your pot been passed down?

"Hiss." The Junior Secretary clapped his hands suddenly and said in a very cooperative manner, "Your Highness the Third Prince is right! Sir, Doctor of the Water Conservancy Department, do you have any new research on the repair of canals and city walls, such as the preparation of glutinous rice?"

The doctor of the Water Conservancy Department also understood: the Third Prince and the Junior Secretary were singing the same tune in an attempt to bring up the topic of cement formula again in the system.

The doctor of the Du Shui Si said: "It's not that I don't have any ideas. For example, many of our earth bricks are made of boiled glutinous rice soup mixed with lime paste containing gravel and clay. So, if the thickness of the glutinous rice soup is improved, will there be any..."

System: [The glutinous rice is thick... it doesn't matter much. ]

Du Shui Silang was delighted and continued, "There is also soil. Sometimes different colors of soil have different hardnesses when mixed..."

System: [Ha! This person is really perceptive. The mineral compositions in the mud and sand are different. For example...]

The doctor of Du Shuisi's eyes became brighter and brighter.

He usually likes to study the formula of these things, and has accumulated a lot of questions in his mind, but unfortunately no one can answer them for him. However, now, the system can answer them all.

Thinking of this, the doctor from the Water Conservancy Department became more and more excited as he spoke. Later on, he was not concerned at all with the formula of earthen bricks. He almost wanted to recount all the difficulties he had encountered in building canals over the years.

After listening to the words of the doctor from the Du Shui Si, Shao Zhanshi was like a wild boar out of a cage, running around in a panic, talking about "what kind of weather is better for mountain climbing"... Even the system went astray, and there was no way back.

Shao Zhanshi became anxious.

He desperately winked at the doctor of the Du Shui Si: "Sanhe soil! Cement! The key point!"

But the doctor from the Du Shui Si Department was too drunk to see anything.