The reason why Wu Ning asked Raleigh to check the water supply and water supply in Chang'an was because after several days of observation, he found that Chang'an's water conservancy was very problematic.

......

The so-called eight rivers surround Chang'an.

Judging from the map, there are a total of eight rivers around Chang'an City, and there is no shortage of water resources.

Moreover, as the ancient capital of the Thirteen Dynasties, after thousands of years of construction, the water supply and water supply system of Chang'an City is also very developed, divided into open channels and culverts. There are also many pools and lakes in the city, and the people basically do not have to worry about water problems.

And the sewer system is not weak, under the planning of several dynasties, the domestic water of the city residents or infiltrated, or discharged into Weishui, for thousands of years, it has always been like this, and there is nothing wrong with it.

However, not anymore.

Don't forget, Chang'an City now has a population of nearly two million! It is incomparable to previous dynasties.

How polluted must be the domestic sewage produced by 2 million people eating and drinking Lazar seeping into the ground or being discharged into Weishui?

......

During this time, Wu Ning has also been thinking about why Chang'an declined after the Tang Dynasty?

In his opinion, there are regional reasons for this.

With the opening of the Grand Canal in the Sui and Tang Dynasties, the rise of the Jiangnan region, and the decline of the Silk Road, the economic center of the Central Plains began to shift eastward, and Chang'an lost its original position, which is a one-sided reason.

On the other hand, Chang'an is located in Guanzhong, which is the Ganxi region in later generations. The land cultivation capacity in this area is simply not enough to feed Chang'an's growing population base.

Another point is that the abandonment of the Tiger Prison Pass has made Chang'an lose the ability to defend strategically.

However, then again, the Silk Road can be reopened, and food shortages can be transferred from the south, isn't that what Kaifeng in the Northern Song Dynasty did?

As for the Tiger Prison Pass, it can also be rebuilt.

Even if Chang'an is no longer the capital, at least it will not decay so completely, so why?

Today, Wu Ning finally has a clue - it's because of pollution!

With a population of nearly two million, the city is no less than a medium-sized city in later generations. Even because of the number of people per unit area, it is larger than the medium-sized cities of later generations.

Such a large city and such a dense population base have reached the point where the construction of primitive towns cannot afford it.

The domestic garbage and waste water generated will be an astronomical mathematics, and there must be extremely advanced sewage and pollution control capabilities to ensure the normal operation of the city.

Otherwise, as in history, within a few decades, Chang'an's groundwater and surface water will all be polluted and no longer suitable for human life.

Wu Ning lowered his head and pondered, Wu Zetian gave him the city to make a prison, so that he could rectify the things on the ground, but if he really wanted to do a good job in this city and really do something practical for Chang'an, then he had to take care of the underground affairs.

Otherwise, this city, which has witnessed the history of the Central Plains civilization for thousands of years, will inevitably follow in the footsteps of history.

......

Seeing Wu Ning staring at Hetu, Lao Eleven spoke, his face stunned.

"You don't want to fight the idea of Chang'an Water Conservancy, do you? That's a big deal! ”

Wu Ning smiled bitterly, "It's not a big deal." The point is, where does Lao Tzu start? ”

He is especially studying accounting, tidying up accounts and managing finances, which is not to be said, but water conservancy ......

Is it okay to have a Everest?

......

When I didn't know what to do, I heard a noise outside the hotel.

Wu Ning glanced at it, as if it was a child fighting.

A group of well-dressed half-sized children were in a group, noisy and scolding.

At first glance, it was the children of rich families who were well fed, but Wu Ning didn't care too much.

In his opinion, children, fighting is a normal thing. Moreover, whether in his previous life or in this life, he has always felt that if a man is not a little young and frivolous, and not a little wild, then he is still called a man?

As long as you are measured and not out of line, you will be fine.

However, after a while, the children were not dispersed. Moreover, looking in from the cracks in the people, these rich people are still surrounded by a girl.

This......

Wu Ning is a little on top.

Guys have to have a bottom line, right? Even women are beaten and scolded, that is, there is no taste, and it has nothing to do with children or not.

Moreover, the little girl who was beaten and scolded, Wu Ning actually knew her.

"Go." gave Raleigh a look, "Separate them, why do you still beat women?" ”

"Gotcha!"

Luo Liteng got up, but he didn't talk back to Wu Ning.

Outcome......

It turned out to be an accident.

Do you think, Chef Luo has been holding back the fire for the past few days, but there is a chance for him to stretch and stretch, can he start lightly?

......

————————

Actually, Chef Luo really didn't want to be ruthless, there was indeed a group of children outside the door.

The girl who was bullied was older, fourteen or fifteen years old. And the group of rich people around her are even younger, only eleven or twelve years old.

The leader was a little chubby boy who looked less than ten years old.

"Little slut!! Who made you dangle on the streets? ”

The fat baby at the head is obviously not low, and there is a servant and maid by her side, pointing at the girl and scolding.

"Didn't Ben tell you? See you once, hit you once! ”

The little fat man had a domineering posture and scolded viciously.

"Slut! Dare to be the enemy of my Cheng family!? Don't look at what you are! ”

"Your mother was born to a slut, and you were born to a slut. Your dad is a waste too! Go back to the countryside as soon as possible, and don't be an eyesore in Chang'an City. ”

"Did you hear it!"

As he spoke, the little fat man was about to fight.

The girl was obviously terrified, and curled up in the corner, and her body shrank even tighter as the little fat man raised his hand.

A child on the side, who was a little older than the little fat man, came up and pretended to stop him.

"Boxian, forget it!" glanced at the girl contemptuously, "Like his father, he is a waste who is not angry, and you are so idle!?" ”

"Phew!" The little fat man took a sip, "I'm upset when I see her!" ”

"Eh, eh!!" At this moment, Chef Luo finally squeezed into the field.

They are all children, and Chef Luo didn't take it too seriously, and his big face was raised, "It's almost there!" A group of boys bullying a girl, what is the ability? Scattered, scattered! ”

Raleigh said as he stood in the middle and began to coax people.

Seeing that the onlookers still refused to disperse, Chef Luo was even more angry.

"What do you see? It's all fucking long-hearted, is it? A bunch of children are not sensible, and you are not sensible either? Don't know where to stop? Still fucking have a face to watch the excitement!? ”

When everyone heard this, they shrank their necks weakly, and said in their hearts: It's not that they don't want to stop it, but they don't dare to stop it. This man must have come from out of town, and he doesn't know the depth. Those few masters in the field, who dares to stop them?

Hehe, someone has already begun to sneer.

You dare to stop it, but I don't know, after a while, there will be such a majestic and bullish coaxing!

......

。