Zhao Guang seemed to see Feng Yong's thoughts, and smiled at the moment: "I saw my sister in the past two days, but I was advised, saying that my brother is a son of a high-ranking person, and he doesn't understand some things, so it's normal." As long as the younger brother follows the elder brother closely, if you don't understand anything, you will first look at it and remember it, and you will know it in the future. ”

If this Huang Wudie removes that man's heart, it will not be a problem to be a virtuous helper! Coupled with that net worth, if this guy can really take her down, it will be worth it.

Thinking like this, the two stood by the Jialing River and watched those Qiang girls picking up stones.

Feng Yong asked those Qiang girls to pick up pebbles, of course, not to take them to build a sheepfold.

Asking the Qiang people to collect more firewood is of course not so that they can burn the fire more vigorously at night.

He was there to burn stones.

If you want to wash a small batch of wool, then it is enough to wash the plant ash, but like these more than 100 sheep, there are at least a few hundred catties of wool, which is not a problem that the plant ash can solve.

So Feng Yong wants to find more alkali.

Whether it is in people's daily life or in industry, alkali is a very important thing.

For example, it is all flour made from wheat, and others can only make steamed cakes, and they are still rigid. But Feng Zhuang can make soft and delicious steamed buns, the difference is that there is no alkali.

In fact, alkali is also very common.

As long as there is a thatched house, there will be a layer of white crystals at the root of the wall, which is an alkaline substance naturally analyzed, also known as nitrate.

When Feng Yong was a child, he often ignored the smell of the thatched house, and his friends deliberately ran to the root of the wall, took a piece of paper and followed it underneath, and then carefully scraped off the layer of things, wrapped it and put it in the schoolbag.

When I have time, I find some charcoal, grind it into powder, mix the two things together, and carefully pour it into a long black line on the ground.

Finally, take a match, and the black powder line will burn all the way through, like the thief in the movie when the explosive bag detonator burns, and a group of little kids are excited there.

In that era when even firecrackers were a luxury, this was already a very high-end way to play.

As for the alkali to be used for eating, in the rural kitchens of the eighties and nineties, basically every household would have a piece of pale yellow crystal, that is, the alkali block made by the soil method.

When you want to use steamed noodles or rice cakes during the New Year's holidays, you can use a kitchen knife to chop a small piece down, grind it again, and then sprinkle it into the flour.

The soil alkali method is also very simple, the simplest method is to grind with plant ash, then put in water to precipitate, then filter, and finally evaporate, the resulting crystalline is alkali.

This is the basic operation of high school physics, and if you don't know even this, it is a clear failure in high school physics.

The basic ingredient of plant ash is potassium hydroxide, which is found in high school physics books.

This is how the alkali used in Fengzhuang to make steamed buns is obtained.

Of course, this kind of soil alkali was rarely seen in later generations, and when Feng Yong grew up, it was basically an industrially made edible alkali, snow-white and snow-white, very good-looking.

As for the alkali that Feng Yong now uses to wash wool, it would be too wasteful if he had to use the alkali analyzed from plant ash, and the amount was not enough, so Feng Yong decided to make a more large and cheaper alkaline thing.

In the memory of my previous life, I didn't know if it was physics or chemistry in high school, and there was a very common question, that is, there was clear water in a test tube, and when you blew it into it with a straw, it would produce flocculent sediment, what could it be inside?

The answer is filtered lime water.

What Feng Yong wants to do now is to burn the pebbles with lime, and then put the lime into the water to get lime water, and after the lime settles, you can get alkaline lime water.

The quality of the lime burned from pebbles is actually not good, and with the current technical conditions, if you want to get the best lime, you still have to go to the mountains to find those mountain stones to calcinate.

But the mountain rock is so big, and it has to be knocked and moved, when will it have to be done?

If you want to burn fast, you have to use coal, but where does coal come from at this time?

It's not impossible to use firewood, but it's measured in 10,000 catties, and it seems that a kiln has to be built, and it takes so much effort to wash these hundreds of catties of wool, unless he has a problem with his brain.

Besides, what Feng Yong wants is the alkalinity of lime water, and he doesn't want to build a house, why do you want lime of such good quality?

A layer of firewood is spread on top of a layer of pebbles, layered on top of each other, and the top is burned with firewood overnight, and the next day when it cools down, it is almost ready to use.

It was very boring to watch those Qiang people working, but Zhao Guang next to him was very interested in the Qiang people shearing sheep, and even leaned over to look at it regardless of the sheep's taste.

Feng Yong was interested, but he was very fond of Yang'an Pass in this ancient battlefield. Walking by the river, turning a corner along the city wall, looking up at the tall city wall from time to time, I thought, how did Zhonghui beat it down in such a majestic pass? It seems that there was no major war here when Wei destroyed Shu in history!

Thinking of this, my heart suddenly moved.

I saw a man standing under the city wall in front of him.

Waving his hand to signal that the old man Lu who followed behind them didn't have to follow, Feng Yong stepped forward and greeted with a smile: "Why is Sanniang here?" ”

Guan Ji was pacing around with his head down, as if looking for something, when he heard the voice, looked up, and saw Feng Yong, his cold face softened a little, and he gestured: "I never wanted to see Feng Langjun here." ”

Feng Yong thought to himself that Huang Wudie came to the door, but he didn't see you, it turned out that you came here.

"I saw Sanniang walking around here from a distance, why is this?"

Probably because when the two were alone yesterday, a lot of strangeness between the two disappeared, and Guan Ji's voice became less cold: "Speaking of this, I have to ask Feng Langjun, when I asked Feng Langjun to help the concubine find the bamboo slip yesterday, have you ever seen a knife and pen?" ”

Feng Yong's face stiffened, and he laughed dryly: "What knife and pen?" ”

"Naturally, it was the knife and pen used by the concubine to engrave words at that time."

Guan Ji frowned lightly, as if she was talking to herself, and seemed to explain to Feng Yong: "I found that the knife and pen were missing last night, so I borrowed it from Feng Langjun." I searched the wall this morning, but I found nothing. I thought it had fallen off the city wall, but I didn't think about it and didn't find it. ”

Feng Tujiao subconsciously wanted to touch his arms, but he couldn't help it, thinking, I didn't bring it with me when I went out this time, I put it in the post house, and I was ready to be a token of love.

"If you can't find it, it doesn't matter." Feng Yong pretended to smile generously, "You can use my one, I still have it." ”

Guan Ji's eyes flashed, he looked at Feng Yong, he stopped talking, and after a long while, he shook his head lightly: "It's not this problem." That knife and pen are extraordinary for the concubine. ”

Such an important thing is the most suitable to be used as a token of love.