Regarding Li Chiying's comprehension in this regard, Pei Min was not only amazed but also admired.

He has the knowledge of the 21st century, and he knows some common sense that ordinary people don't know. But as an ancient, Li Chiying was able to understand and comprehend what he said in an instant, which really required extraordinary talent.

Pei Min was worried that Li Zhiying's mouth was not firm, and he accidentally leaked the formula of black powder, and when he had not yet arrived at the black powder making workshop, he detailed the prospects of black powder and its military role, which also showed the rampant meticulous work of Chang'an.

Although Li Chiying is young, he is not unreasonable, on the contrary, he is extremely alert.

Especially when this matter is related to Li Tang Jiangshan, Li Zhiyingqiao's face showed a decisive look, and said: "Guogong rest assured, Zhiying is only interested in this, and will never disclose it to others." ”

Seeing this, Pei Min was also very relieved, and took Li Zhiying to the black powder making workshop.

Call Qing Xuzi and Gu Hongzi, who are busy preparing black powder.

Before Pei Min could introduce him, Qing Xuzi and Gu Hongzi had already saluted Li Zhiying.

Pei Min then remembered that Qing Xuzi and Gu Hongzi were both well-known Taoist priests in Chang'an, and Princess Yuzhen's Yuzhen Temple was one of the most luxurious Taoist temples in Chang'an.

"It's good that you know each other, so you don't have to worry about my introduction!" Pei Min clasped his hands together and said, "Princess Yuzhen accidentally mastered the method of fusing black powder and making it into granules. This whim was able to compress the power of black powder, making it more powerful and convenient. Let's see if the princess's method can be used on black powder. If possible, immediately granulate the black powder for the purpose of opening mountains and repairing mountains. ”

Qing Xuzi and Gu Hongzi all looked at Princess Yuzhen in surprise, and they really couldn't understand that this princess of the Tang Dynasty, who was like a flower and jade, actually had such ability.

Li Zhiying was a little restrained in front of the two top Taoist alchemy masters, but seeing Pei Min's encouraging eyes, he gradually became emboldened, and explained in detail how he fused various materials and made them into granules.

The more Qing Xuzi and Gu Hongzi listened, they were in awe, no longer hesitated, and immediately operated according to Li Zhiying's way.

It took three days, granular black powder appeared, compared with powdered black powder, granular black powder has the characteristics of low temperature and high combustion rate and high expansion, as well as the advantages of easy to carry, not easy to leak and blow away.

There is no doubt that granular black powder is a revolution in black powder.

Pei Min didn't know when Qingxuzi, Gu Hongzi and others would be able to open up and complete this change.

But he didn't want to be helped by Princess Yuzhen Li Zhiying, so he completed this change almost effortlessly.

With the new black powder, Pei Min is full of confidence in the upcoming burden of mountain opening.

The assembly of 250,000 laborers was not a simple matter, and even if Wang Ju, the head of the household department, was particularly attentive in this matter, it took half a month to complete the collection.

Pei Min didn't have extra time to accompany Princess Yuzhen, and went directly to the front line, just arranging for Wang Xiaobai to escort her safety.

After these days of on-the-spot investigation, Zhang Jiuling has a strategy and foresight, and Lu Xiang has rich experience, and they have taken a short break to reorganize the process of sectional construction, and plan the details of blasting to make it more reasonable.

"Boom!"

"Boom!"

"Boom!"

……

All kinds of deafening sounds rang out one after another, whether it was solid granite or rock-like basalt, under the blasting of black powder, they all turned into rubble of different sizes, and easily let the people move down the mountain.

Facing 200,000 people, Pei Min was addicted to commanding 200,000 people after a while.

Compared with the 200,000 army, 200,000 people are more difficult to deploy.

They are not soldiers, and many places cannot be dealt with by military means, but they test Pei Min's ability to coordinate the overall situation.

The actions of these 200,000 people, eating, drinking, sleeping, and rubbing against each other, were no easier than marching and fighting.

Pei Min boasted that his command level was passable, but in the face of 200,000 people, he was also too busy to deal with it.

The experienced Lu Xiang advised Pei Min not to be too polite and not to be too easy to speak.

Many things are a matter of a few whips, just a few lashes.

Pei Min ignored it, he didn't care what others did, but labor was to force the people to work with the nature of compulsion. If you force it with a whip again, what is the difference between it and Yang Guang?

Pei Min can't do that kind of ambiguous thing, so he should exercise his command level and take the trouble to deal with all kinds of things.

This person was also forced out, this is not true at all, Pei Min gradually got used to it, and began to be handy, and he became more comfortable.

Under his command, 200,000 people did their duty and excavated the Longshan Road at an astonishing speed.

Looking at the progress of Longshan Road, Pei Min couldn't help but be very satisfied.

"Guogong, there are too many stones, I don't know where to pile them! It's a pity to throw it away directly, it's all good basalt and granite! Zhang Jiuling saw a problem, there was too much gravel opened, and there was nowhere to put it.

Pei Min thought for a while and said, "Ship it to the twelve states of Longyou, choose an open place, and place these stones." It will definitely be useful to build bridges and roads in the future. ”

Zhang Jiuling frowned and said, "It's a good idea, but ...... We don't have that many people and we don't have that many vehicles. ”

Pei Min was stunned, and suddenly smiled: "I have a way, you will divide the gravel piled up at the moment into twelve equal points." Then write for me to all the envoys of the Longyou Army in the twelve states, and ask them to add a weight-bearing training to the training content of the soldiers, and let them each move the gravel. ”

Zhang Jiuling's eyes lit up and he hurried down.

Similar problems are endless.

Pei Minbing's soldiers came to block the water and cover the earth, with the assistance of Zhang Jiuling and Lu Xiang, and under the concerted efforts of 200,000 people. Any difficulties will be solved in front of them.

It took four and a half months and more than 120 days, a mountain road across Longshan, connecting the east and west was officially opened, named Longshan Road by Pei Min himself, and with two pieces of basalt in the square handwriting "Longshan Road" and wrote small characters on the side, "Completed on March 28 of the sixth year of Kaiyuan, through Guanzhong, Longyou, Liangzhou 200,000 people worked together to build. ”

The handwriting on both tablets is identical, and no one's name is mentioned at all.

Longshan Road is 31 miles long, the road is nearly 16 meters wide, extraordinarily spacious, elm trees and pine trees are planted on both sides of the road for passers-by to enjoy the coolness.

There was little time to rest, and as soon as Longshan Road was completed, Pei Min flocked to Wusheling with the people full of joy and high morale.

In four and a half months, Pei Min only sentenced 21 people who deserved it, and never recklessly violated the criminal law. Instead of using the whip on innocent people, it helped them overcome all kinds of difficulties together and won the trust of the people.

With a wave of his arms, it can be said that all people are united, and 200,000 people are like a torrent, rushing towards Wusheling Ridge.

Wusheling is more difficult than Longshan, but in the face of the Chinese people who are good at creating miracles, the 250,000 people who are united in their hearts, what is there to fear?