The ring came to Li Chengqian's hand, and Li Chengqian had a comprehensive understanding of this ring, this ring, the workmanship is really simple, except for the special material, there is no merit in other places.

He remembered that the pre-Qin items he had seen on some pictures before were all clumsy workmanship, and he thought that these things were too old to be like this.

It turned out that people at that time actually liked this kind of simple things.

Li Chengqian said: "Do you see it, what is simplicity, what is wisdom and foolishness!" This is the wisdom and foolishness, you all learn a little! ”

Xiao Cui rolled her eyes, and she began to bury this thing in her heart, isn't it just a simple ring? It's not as good as Li Chengqian and Mo Yu's wedding ring, it's too ordinary!

This black ring, no matter how you look at it, how it looks like it was burned out of the fire, it will be this kind of black, I'm afraid it can't be washed off.

Du He had no interest in the ring, and he thought about what to do with this big basket of fish.

Such fish should be delicious when boiled in fish soup, and it is also delicious when fried, and it is also good to eat it even when it is grilled directly.

The more Du He thought about it, the more greedy he became, and he couldn't hold back his saliva!

Du He said: "Your ring is not interesting, put it away first, let's make this fish, it should be delicious." ”

"You just want to eat, this thing is indeed a good thing, let's try it today!" Li Chengqian said.

In a house in Chang'an, dark and dark, an old woman in a black robe suddenly opened her eyes.

"Our holy relics have appeared, you go to find them, and they will be in Chang'an City!"

"Yes."

Several figures disappeared into the shadows.

"It's been almost a thousand years! The legend is actually true! This time, be sure to bring it back and pass it on! ”

Prince's Mansion.

One of the most interesting things he found was the swim bladder in the belly of these small fish, which looked like two transparent balloons connected together.

He gathered them up and arranged them in a row, and threw away all the other entrails.

Li Chengqian was discussing things with Wangcai and didn't pay attention to the situation here.

"It stands to reason that you should eat the fish directly, regardless of what is inside their guts, but now that you know more, will you still eat the guts of fish?" Li Chengqian asked.

Wangcai actually doesn't have any requirements for this matter, it's okay to eat, it's okay not to eat, it's okay, anyway, it won't have anything to do if it eats.

But since Li Chengqian asked it like this, it couldn't do it, as if it didn't have any pursuits, and even the internal organs of the fish could be eaten.

Wangcai shook his head as a matter of course, indicating that it did not eat the internal organs of fish.

"This is even more strange, I remember that you like to eat fish because you lack a substance in the body of fish, and as far as I know, this substance should be high in internal organs." Li Chengqian said.

He couldn't remember what was inside for a moment, except to say that it was some kind of substance.

Wangcai is nodding his head now, not shaking his head, it is most afraid that Li Chengqian will mention these things, and it doesn't understand, and Li Chengqian also knows a little about it, so it will be very troublesome.

However, Li Chengqian still helped Wangcai clean up the fish with his own hands, and Wangcai took the fish to the roof to dry and dried them so that they could be eaten later.

By the way, let the kitten take care of it on top, so as not to be eaten by anything else.

Seeing that Wangcai was like this again, and he could only get one fish at a time, Li Chengqian felt funny, of course he wouldn't help Wangcai, after all, this matter was quite fun.

glanced at Li Chengqian elsewhere, and suddenly saw Du He arranging the swim bladders in a row, and suddenly, he rolled his eyes, what is this guy crazy about? What do fish bladders do in a row?

Fish maw, in fact, is something that fish uses to control their own floating and diving, and it also has the effect of assisting breathing, but it is not as enjoyable to eat as meat.

However, Du He obviously didn't want to eat these fish bladders, he put the swim bladders on the ground and got dirty, so Du He just wanted to play with these fish bladders.

？？？

What's so fun about this? Li Chengqian said that he understood Du He's behavior very well.

Soon, Li Chengqian disposed of all the fish in Wangcai, and he came to Du He's side.

"Duhe, what are you doing with these things in a row?" Li Chengqian asked.

"Of course, it's the last one to pinch and pop these fish urine bubbles, and it's going to be very interesting." Duhe said.

"Fish...... Urine bubbles? Li Chengqian was shocked.

He asked, "Duhe, since you think this thing is a fish urine bubble, then I ask you, why is there no urine in these urine bubbles?" All empty? ”

Du He touched his chin and thought for a moment, he said: "These fish, when we caught them, must have been scared to pee, and all the urine in their stomachs was discharged. ”

Li Chengqian: "......"

He simply obeyed Du He, and this kind of ghost truth was also made up, and it sounded quite reasonable.

Li Chengqian sighed.

"Xiao Ningzi, explain to him what this is." Li Chengqian said.

Xiao Ningzi was a little puzzled: "Maybe it's the same as Du He said, this thing is indeed scared to pee." ”

Li Chengqian was speechless, these guys are really ignorant! Haha, it's really enjoyable to know that I don't tell anyone about these things!

He didn't want to tell these people what this thing was, it didn't matter, he didn't need to know, and he didn't need to take an exam.

The fish bladder was almost saved, Du He picked up two, gave one to Li Chengqian, asked him to pinch and play, and kept one for himself.

Li Chengqian pouted: "Childish, I will never play!" ”

Du He didn't think so, he pinched the swim bladder in his hand.

"Horn ......"

It's fun! This thing, it's so loud, haha, I'm really a genius, even if it's a fish urine bubble, I can find a way to play.

Watching Du He play like this, Li Chengqian inexplicably remembered the cannon he played when he was a child, a small ball of paper, which was filled with sand, potassium chlorate and phosphorus, which would explode if thrown on the ground or pinched by hand.

When he thought of this thing, he inexplicably sighed a little emotionally, yes, when he was a child, he was really happy to shoot guns during the New Year!

He smiled and popped a swim bladder.

"Horn ......"

Really fun.

Li Chengqian stood up and stepped on it, and suddenly, more than a dozen swim bladders were stepped on by him at the same time.

"Horn Horn Horn ......"

The sound is endless, this kind of sound makes Li Chengqian feel like he is back in his childhood, comfortable!

Duhe: "??? ”

Li Chengqian, who didn't care much about his gameplay before, why did he suddenly become addicted to playing? Moreover, he also stepped on all the fish urine bubbles that he had stored for half a day?

It's cool to think about it! Du He couldn't help but regret in his heart, why didn't he strike first and step on all these things?

"You pay me! I'm just pinching one by one, you're good, you stomped all my toys in one kick! Duhe said.

Li Chengqian: "......"

"Well, how about I have someone make us some wrestling guns?" Li Chengqian said.

"What is a smashing cannon?" Duhe asked.

"It's a cannon that explodes when it falls to the ground." Li Chengqian said.

Duhe was interested.

Then, Li Chengqian thought about the difficulty of this matter, how to make potassium chlorate? What a troublesome look!

"If only gunpowder and sand could be used to smash cannons......"

Li Chengqian knew that this was impossible, because he had tried, and the gunpowder sand would not explode.

"It seems that you can only use metaphysics, make a wish today, and receive the courier tomorrow!"

The cannon is also not a very expensive thing, and he can receive it completely.

"Tomorrow you will play with the cannon, and today you will eat fish." Li Chengqian said.

The matter of eating fish is not a big deal, Li Chengqian said a bunch of things like collagen, and Mo Yu Luo Li was confused.

The Ministry of Industry sent someone to let Li Chengqian guide their sewage treatment tank, and Li Chengqian's eyes became focused, this is the important thing.

The sewage treatment plant sounds like a very tall name, and when Li Chengqian arrived at the place, he found that this place was really not very good.

A few large newly dug pools, as well as a few houses, were not very presentable.

"This is the sewage treatment plant you built for me?" Li Chengqian said.

"Your Highness, we found that this sewage treatment plant cannot treat manure, but can only treat water such as ordinary rainwater and vegetable washing water." The director said.

"It's so backward......," Li Chengqian fell into deep thought.

He was not satisfied with such a sewage treatment system, but there was no way but to make a compromise.

It seems that the problem of groundwater pollution can only be delayed, not completely solved, so tap water is the only solution to this matter.

The thought of the money needed for such a big project gave him a headache.

"Tell me what your sewage treatment plant is used for." Li Chengqian said.

"The first row is a sedimentation tank, which mainly presides down heavy things and buries them, and the second row is a pool filtered with charcoal, and the effect is okay." The director said.

This is the idea that Li Chengqian mentioned before, and when the principal says this, he has nothing to say.

This is the limit of what he can do, and as for what is in the filtered water, at least it is not visible to the naked eye.

"In fact, gold can be extracted from the sedimentation tank." Li Chengqian said.

The principal's eyes lit up and he was very interested.

"How?"

"I don't know."

Well, isn't this just empty joy?

In fact, there is gold in the soil, and there is gold in the human body, but it is not cost-effective to extract.

Li Chengqian said: "Yes, at least the most basic facilities are available, as for the upgrade, I will talk about it later, I am very satisfied with what you have done this time." ”

As long as Li Chengqian is satisfied, everyone is very happy, and the hard work has not been in vain.

"Try to build the factory here as well as possible, otherwise the workers here will be very uncomfortable." Li Chengqian said.

"Understood."

Li Chengqian thought for a moment and said, "Take me to the sewage outlet to have a look." ”

"Yes."

In a short time, several people took Li Chengqian to the sewage outlet, which was just a huge hollow cement pipe, and naturally there was no sewage.

The sewer was not open, Li Chengqian looked at the river, the expression on his face was very strange, he didn't think how powerful the sewage was in ancient times, at least there would not be many strange things.

However, the impact of sewage on the nitrogen, phosphorus and potassium levels of river water is huge, and it may cause a biological crisis in the eyes.

"You have to find some people to monitor the water quality situation downstream all the time, and if something happens, come to me as soon as possible, you know?"

"Your Highness, can you tell us more about what will happen, and we can have a reference."

"It's just that there are suddenly more aquatic plants downstream, and the water even turns green, this kind of thing, you should beware of it." Li Chengqian said.

"Got it."

"Very well, come with me for a spin upstream." Li Chengqian said.

"I don't know what Your Highness is doing upstream? There is no engineering from us upstream. The director said.

"If you don't have it now, it doesn't mean you won't have it in the future, let's go and find a place with good water quality and protect it, maybe I'll have to carry out a big project soon." Li Chengqian said.

"Please also ask Your Highness to make it clear."

"Water works." Li Chengqian said.

To put it simply, it is these five words, but the people who follow him fall into endless imagination, the water that comes by himself? Good stuff!

Everyone followed Li Chengqian and walked upstream along the river, and encountered a lot of bridges on the way, all of which were built on the surface of the river with a few logs, which looked very unstable.

However, this does not stop everyone's enthusiasm for building bridges, and there are small bridges every few days away.

Seeing that Li Chengqian was very interested in these bridges, the director began to introduce.

"Your Highness, this kind of bridge is very good, every year when it comes to the time of the big flood, there is not a single such bridge left, and all of them are swept away by the water, but as long as the water level drops, we can quickly build a new bridge." The director said.

"Don't you think it's troublesome?" Li Chengqian asked.

"It's much better than wading through a river, where the rocks are mossy and it's easy to slip."

Li Chengqian nodded, noncommittal.

Chinese like to build bridges, this thing is world-famous, and sure enough, this strange hobby has been around since the ancestors.

Perhaps, it is to prove that human beings can transform nature themselves.

There are several good spots, but unfortunately they are all on the other side of the river, and it is very unwise to let the water pipes pass through the river, and it may be washed away in the event of a major flood.

What's more, over the years, the wind and rain have been smooth every year, and the river has risen very much in summer, and he doesn't think that the current process can do this.

encountered a lot of bridges and a lot of cattle herding babies, and finally, Li Chengqian found a place he thought was suitable, where the water surface was calm and suitable for transformation.

"Make a note of this place, protect it first, and set up a sign, it's called a water source protection area, and I should be able to use it soon."

"Yes."

In fact, everyone doesn't quite understand what Li Chengqian meant, this water is always flowing, and if you want to protect it, you have to protect all the rivers.

Is it really useful to protect only this one?

What they don't know is that this kind of protection is indeed useful, because the river has a strong self-purification ability, and a section of the protected river can make the water quality much better.

"Where am I going to find such a long pipe? It has to be an iron pipe, this process is a problem in itself, how can it be made in large quantities? ”

Li Chengqian began to have a headache.