"Dig up the silt downstream at the age of year, fill the bottom of the canal upstream at the age of three······"

Muttering softly, Liu Ying couldn't help but shake her head slightly.

Seeing Liu Ying's expression, Yang Chengyan also understood: Zheng Guoqu's repair work, the prince is afraid that he wants to do it once and for all.

"Alas······"

"But I beg the prince not to be too perverse······"

After secretly slandering himself, Yang Chengyan raised his head and looked at Liu Ying's gaze with a faint sense of worry.

Throughout the ages, everything involving water conservancy has never been associated with the word 'once and for all'.

From the ancient period of 'Dayu three times without entering, in order to control the flooding of the river', to the past thousands of years, countless revered sages of water control, will be an unquestionable reality, in front of future generations.

- Water control has never been a matter of one person, or even a generation!

Let's just say that thousands of years ago, the great river that was 'tamed' by the ancient sage Dayu has been surrendered for a long time after that?

No!

Instead of, on the contrary, there is a large-scale breach and diversion every 100 years or so!

Not to mention the big rivers, let's just say that the small ditches and ditches on the rural village roads that are no more than knee-deep and no more than three feet wide also have to be cleaned up with silt every year?

Therefore, in Yang Chengyan's view, whether it is a miraculous work like a big river or a man-made water conservancy like Zheng Guoqu, like every river and ditch, it needs to be maintained and repaired every once in a while.

Otherwise, it will be like Zheng Guoqu today.

——The evil consequences of not maintaining and repairing for many years will inevitably require a huge force that will end up in the center of the court before it can be resolved.

But Liu Ying seems to have a different view on the point that 'once and for all is not advisable'.

"Hmmm······"

After a little hesitation, Liu Ying looked at Yang Chengyan with a smile, and said with a little embarrassment: "Lone still has a question." ”

Hearing this, Yangcheng Yanzong shook his head in his heart, and he had to make a deferential posture on his face.

Seeing Liu Ying's words, he said a little weakly: "Shaofu said that the sediment blocking the downstream is all downstream from the upstream? ”

"That being the case, let's try to say it."

"——If a way is found to consolidate the soil upstream of the Zhengguo Canal, won't it be possible to make the soil upstream unable to go downstream?"

"If the soil upstream is solidified, there will be no mud blocking the downstream?"

Hearing Liu Ying's words, Yang Chengyan first subconsciously shook his head.

When I come back to taste, my face can't help but stagnate!

"Where did the family know about the plumbing?!"

With an exclamation in his heart, Yang Chengyan's eyes couldn't help but widen slightly, and there was disbelief clearly written in his eyes!

Liu Ying's understanding of the hydraulic work was obviously a little unexpected by Yang Chengyan.

In fact, not only Yang Chengyan, I am afraid that in the hearts of every courtier and official, they all hold the concept of 'meat eaters despised' to varying degrees.

Not to mention the prince, it is the son of the Gaomen family, at Liu Ying's age, it is already remarkable to know what the canal is, what it looks like, and what it is for.

Even if Liu Ying was the crown prince, Yang Chengyan never expected to get a feasible plan for the renovation of Zheng Guoqu from Liu Ying.

If you can get together the money and food, and give enough coolies, the Shaofu can handle the rest!

But when Liu Ying said the view that 'if the soil in the upstream is fixed, the downstream will not be blocked', Yang Chengyan's attitude towards Liu Ying couldn't help but quietly change.

"This time, in order to renovate the Zhengguo Canal, the prince is afraid that he has made a lot of efforts······"

Thinking about this, Yang Chengyan couldn't help but quietly put away the faint contempt for the 'layman' in his eyes, and looked at Liu Ying with a little solemnity.

"What the family said really hit the nail on the head!"

"Where there are big rivers and big streams, if you want to make their downstream not break due to blockage, the best way is to make the soil upstream solid!"

Nodding slightly to Liu Ying with appreciation, Yang Chengyan continued: "If you want to consolidate the soil upstream of the big river, you should plant trees with long roots, deep roots, and a lot of water along the river. ”

"Such long roots, deep roots, and many trees of water are mostly called by hydraulic workers: the wood of solid soil."

"If such soil-fixing trees are planted in the upper reaches of rivers and rivers, the deep roots of the trees can stabilize the soil along the shore and ease the resistance of sediment downstream."

Speaking of this, Yang Chengyan couldn't help but shake his head with regret on his face, and sighed slightly.

"However, the Zhengguo Canal is no more than 300 miles long and less than 10 zhang wide."

"It takes decades to plant solid wood upstream, not to mention the growth of its wood; If you grow up, I am afraid that it will not help much······"

After that, Yangcheng Yan finally bowed to Liu Ying, and looked at Liu Ying's gaze, and couldn't help but bring a little closeness.

"The family has such a heart, and the minister is very lucky."

"However, the soil upstream of the river, river, and canal is difficult for thousands of years to solve, especially the canal, which can be called an unsolvable problem!"

"The family wants to consolidate the soil ······ the upper reaches of Zhengguo Canal"

After a moment of silence, Yang Cheng Yanwan still smiled and shook his head.

"Looking at the world, there is probably no such good plan."

Hearing Yang Chengyan's slightly more professional interpretation, the hundreds of officials in the hall couldn't help but fall into thought.

After discovering that they could not understand the word 'solid earth' very well in any case, everyone gave up thinking one after another.

After a while, everyone couldn't help but raise their heads again, and they threw their eyes full of appreciation at Liu Ying without hesitation.

Although he didn't understand the concept of 'Solid Soil Wood', most of what Yang Chengyan said could be roughly understood by everyone.

For what Liu Ying said, everyone basically understands.

Although I don't know what level of recognition Liu Ying's proposal is in the circle of 'hydraulic engineering', it is not difficult for everyone to see that the prince Liu Ying is not the son and brother who only knows how to eat, drink and have fun in everyone's stereotype!

In order to renovate Zheng Guoqu, Liu Ying should have put a lot of effort into this time and learned a lot of things!

Not to mention what useful things I have learned, just this attitude of 'I don't understand, but I can learn', I don't know how many streets I have left my peers behind!

And today, when Liu Ying shows the image of a prince who is lenient to his courtiers, focused on affairs, humble to others, and willing to learn, all the hundreds of courtiers in the palace are full of expectations for the future!

Just as the ministers were thinking about whether to make a round and tell Liu Ying, 'You have done a good job, but there is really no way to do this', but when they saw Liu Ying on the royal ranks, they still shook their heads without giving up.

"That's not right."

"The method of soil consolidation is not just the roots!"

Liu Ying muttered to herself for no reason, which suddenly caused everyone in the hall to raise their heads with doubts.

"Family, it seems to be a little paranoid, right?"

Without waiting for everyone to turn around, they saw Liu Ying get up from his seat suddenly, and looked at Yang Chengyan with a serious look under the unexplained gaze of everyone in the hall.

"The soil upstream of Zheng Guoqu, if it is pressed with heavy objects, it must be solidified?"