"Color!"

With an abrupt cheer, Liu Ying stepped forward with joy, ignoring the figures of the craftsmen who knelt on the ground in panic, and came straight to the stones, carefully examining the facets on the two halves of the stones!

Perhaps the prince came with hundreds of officials, and watched the whole process, those stonemasons were obviously a little nervous, and the cut of the stone was not too flat.

To be precise, there are two facets cut out, one of which is slightly convex and the other slightly concave.

But even so, the degree of concave and convex in both sections is not very obvious and is completely within the acceptable range.

Let's just say that the concave section, even if it is a circle with a diameter of two meters, the concave part of it may not be able to store a scoop of water.

"Color!"

There was another unsuppressed cheer, Liu Ying turned sideways, but saw that the craftsmen who cut the stone before had fallen to the ground in panic at this moment.

Seeing this, Liu Yingwen smiled, bowed her waist without mind, put her hand on the dusty, sweaty, and mud-mixed arm of one of the craftsmen, and helped him up.

"You have outstanding ingenuity, exquisite skills, and great contributions to the country!"

"Someone!"

With a loud shout, when a Lang official stepped forward, Liu Ying let out a cheerful sigh with joy.

"All the craftsmen who solve the stone today will be given a piece of gold and a piece of cloth!"

Hearing Liu Ying's words, those craftsmen were obviously stunned, and immediately kowtowed again and again to thank the prince.

At this time, Shaofu Yangcheng Yan also stepped forward with the courtiers and hundreds of officials, and said with a little smug 'modesty' on his face: "Today's stone solution, the craftsmen are a little inaccurate, so the stone is flawed······"

Hearing this, Liu Ying smiled indifferently and waved his hand, turning to look at Xiangyang Chengyan.

"Can you look at the stone bricks that have been cut into stone bricks?"

After seeing the process, these craftsmen cut a boulder in half, and can ensure that the cut surface is as flat as possible, Liu Ying has already made up how the stone bricks in this generation, the length, width, and height are in line with the standard, and the six sides are roughly flat.

——First of all, as Fang Cai did, through the method of 'drawing lines, nailing', the lying boulder is divided into two, and so repeated several times, you can get several pieces of stone slabs with flat front and back sides, uniform thickness, and generally irregular columns!

Then, the edge of the slate is cut off by marking lines and nails to obtain an approximate square, and then it is cut into square bricks of different sizes according to the size requirements.

In this way, the stones, which originally appeared in an irregular three-dimensional shape, were cut into square stone bricks for the construction of the city!

Now that he knew how to obtain the stone bricks, Liu Ying did not plan to waste time and continue to observe, but directly stated the purpose of the trip.

- Finished stone bricks!

Hearing Liu Ying's question, Yangcheng Yanzi hurriedly bowed down, waved into the distance, and hugged a square black stone brick by two craftsmen.

When the stone brick was lightly placed on the ground, while Liu Ying stepped forward to look at it, Yang Chengyan couldn't help but introduce this square brick in a low voice.

"Honored by the family."

"This brick is obtained by the order of His Majesty's 'building the four walls of Chang'an', in the sixth year of the Han Dynasty, with the craftsmen of Shaofu to cut on the boulder."

"It is two feet long and wide, one foot thick, and weighs nearly three hundred pounds; It can be used for laying the inside, outside and top of the city wall to fix the city wall. ”

Listening to Yang Chengyan's interpretation, Liu Ying only nodded slightly, and reached out to touch the four sides of the stone bricks.

It's not very smooth to the touch, but on the whole, it's definitely a flat surface!

Even if it is rough, it is enough to lay the bottom of the canal, and there is no need to worry about the obvious gaps between the stone bricks!

Thinking so, Liu Ying looked at all sides of the stone bricks again, and made sure that they could be counted as planes, before getting up and clapping his hands.

"Now Shaofu, there is such a stone brick geometry?"

Hearing this, Yang Chengyan hurriedly surrendered his hand.

"These stone bricks are all cut from the fifth year of the Han Dynasty, when Emperor Gao ordered his ministers to build Chang'an."

"So far, Shaofu has obtained such stone bricks of two feet in length, two feet in width, one foot thick, and weighing three hundred catties, and there should be 200,000 ······."

Yang Chengyan spoke so hard that Liu Ying couldn't help but quickly acquiesce in her heart.

"The length and width of the stone bricks are two feet each, and the bottom of the Zhengguo Canal is nine feet wide······"

After a little silent calculation in her heart, Liu Ying came to the result.

The bottom of the Zhengguo Canal is nine zhang wide, and it takes forty-five pieces to pave a row of such two-foot-long stone bricks.

And Han Yili, it is 180 zhang, the stone bricks are two feet wide, and the river canal of one mile needs to be paved with 900 rows, a total of more than 40,000 stone bricks.

"200,000 yuan, only enough to lay five miles of ······"

With a leisurely mutter, Liu Ying's face froze, and she looked at Yang Chengyan with a resolute face.

"Hold: Shaofu will charge 30,000 officials and slaves for Zheng Guoqu's forced service, and from tomorrow, 200,000 stone bricks stored in Shaofu will be transported to the upper reaches of Zheng Guoqu!"

Hearing Liu Ying's words, the onlookers and officials looked pale and couldn't help but be puzzled.

But seeing that Yang Chengyan thought about it for a while, he said with a little hesitation: "The meaning of the family ······"

I saw Liu Ying nodding violently.

"Yes!"

"——With this stone brick of 200,000, pave the bottom of the upstream of the Zhengguo Canal to consolidate its soil!"

Liu Ying's words immediately provoked the surrounding officials and courtiers to be stunned in place, and they were stunned!

Take the stone bricks used to build the city walls and lay the bottom of the canal?

"This, this ······"

"Throughout the ages, unheard of?"

Everyone whispered, and saw Yang Chengyan standing up slightly anxiously and bowing to Liu Ying.

"At home."

"This stone brick is 200,000, all of which are cut by Shaofu in the past five years, and they are used in the construction of Chang'an in the coming days!"

"If this time is used for the maintenance of Zheng Guoqu, in the future, how should Chang'an be built?"

"If Your Majesty is to blame, how should the minister answer?"

Slightly sad to ask two questions, Yang Chengyan couldn't help but cast his eyes for help to Xiao He, Zhang Cang and others on the side.

——This is today, Liu Ying proposed the unbelievable plan of 'pressing the soil of the canal with stones', which made Yangchengyan have some respect!

If it was usual, knowing that Liu Ying had to work hard for Shaofu in the past five years, pick and search to save it, and prepare to use the stone bricks to build Chang'an City, even if Yang Chengyan was desperate, he had to protect this bit of family foundation!

Seeing Yang Chengyan's gaze for help, Xiao He thought for a while, and finally turned sideways in solitude and looked at Zhang Cang beside him.

Seeing this, Zhang Cang also pondered for a while before stepping forward with a hesitant face.

"At home."

"What Shaofu said is indeed reasonable······"

Whispered a persuasion, and Zhang Cang bowed slightly.

"Pressing the soil of the canal with stones, not only stone bricks, but also slightly flattened stones, or perhaps?"

"Today, the stone bricks of Shaofu are only 200,000, and they are only five miles long at the bottom of Zhengguo Canal."

"The remaining 100 miles upstream of Zhengguo Canal can only be paved with uncut stones······"

As he spoke, Zhang Cang couldn't help but bow his hand.

"Please go home, think twice······"