I do research in ancient times

Idle around is also idle, I haven't done handwork for a long time, and Ning saw that his hands are itchy.

Salicylic acid is a good thing. In addition to being added as a preservative in daily chemical products, salicylic acid is also the basic ingredient of many important medicines.

For example, the magic drug "Aspirin" that has been popular in modern times for more than a century, the main ingredient is acetylsalicylic acid, which can relieve fever and analgesia and prevent thrombosis, stroke and various cardiovascular diseases.

In addition, salicylic acid can also be used to prepare medicines for the treatment of parasites, which are very effective against schistosomiasis, solium and the like.

After Mo Zong raised pigs, Ning Fei has been thinking about the problem of parasites.

This era does not have the conditions for inspection and quarantine. If everyone in Mozong is really infected with parasites because of eating pork, he will turn a good thing into a bad thing instead.

With this original intention, Ning Fei retreated in the small fire room for two days, and finally prepared the first batch of salicylic acid by himself.

One of the raw materials is willow on Niubei Mountain.Originally, it would be more appropriate to use phenol extracted from coal tar to prepare it, but the coke oven has not yet been built, and the synthesis of industrial processes cannot be carried out for the time being.

Fortunately, there are many willow trees in Niubei Mountain. Although the willow trees all over the mountains and plains have lost their leaves, their bark and roots are still intact. Except for the impurities in the ingredients and the content of active ingredients is difficult to determine, everything else is fine.

With the basic material salicylic acid, in addition to the insect repellent, Ning Sawzi also used local materials to make a batch of foot light scattered.

There are borax mines on Niubei Mountain, so the source of boric acid has been solved.It's just that part of the benzoic acid is missing, which is also unavoidable, after all, Niubeishan can't get benzoin.

Thus, the incomplete version of Zuguangsan was born.

Ning Fei didn't have the nerve to promote it, so he secretly found Liu Tie with the least strong smell to try.

"Are your feet itchy?"

Ning Shaozi asked Liu Tie.

Liu Tie was flattered!

He has been digging mines lately, digging hard, and every day when he comes home, he is too tired to speak, and falls asleep instantly when he touches the bed.

Only in this way can he not have the energy to think too much about the stupid things he did before.

He is more anxious to work now than anyone else, and he hopes that Dongjian will be completed soon, so that he can atone for his merits and continue to stay in the sect.A few days ago, Master and Yu Lao took people to Ding'an City, and the Dongjian team suddenly lacked a lot of people. Liu Tie immediately volunteered to fill the vacancies, and finally the progress of the project was not delayed.

Jizi found him today, and although he only asked a slightly strange question, Liu Tie was still very excited, and immediately said loudly:

"Reporting to Juzi! My feet are itchy! Not only are they itchy, but they are also blistered! If you don't rub them, they will itch so badly!"

Ning Fei was taken aback by his overly excited voice, and thought that you don't have to be so proud if you have beriberi.

He dug his ears, looked Liu Tie up and down, and felt that this kid hadn't entered the blacksmith workshop recently, and the smell on his feet should be softer than those of the previous ones.

"Then... go find a basin of warm water."

"Hey, good!"

Liu Tie quickly took out the basin.

Ning saw that he sprinkled some earth-yellow powder into it, stirred it with a wooden stick, and took three steps back vigilantly.

"Okay then, take off your socks and soak your feet."

"Hey, good!"

Without further ado, Liu Tie immediately began to pick off the shoes and socks.

Not to mention asking him to soak his feet, even if he chopped off his feet to make tea for Juzi, he would be fine, and he would do whatever Juzi said.

The sock fell to the ground, and a smell of fermented soybean water began to spread in the air, but it was much softer than Xu Jin's.

Ning Zaozi leaned forward against the stench, and found that Liu Tie's feet were still alive, at most, he was sweating and airtight, causing the soles of his feet to peel off. The situation was far less serious than he thought.

"Comfortable! Comfortable!"

Liu Tie sighed in relief.

After soaking for a while, there was no adverse reaction, and the overall feedback was good, but Ning Sawzi was not satisfied.

Anyone who soaks their feet will feel comfortable. Liu Tie can't even touch his athlete's foot, so his feedback is really worthless.

But let him find the old men in the blacksmith workshop, he...he...he really didn't have the courage to observe the effect on the spot, so he distributed the foot light to a few people to try it out by themselves. It is said that the follow-up effect is very good, but not Rule out the suspicion of rainbow fart.

Ning Sawzi has little confidence in his work this time, after all, there is one missing benzoic acid!

Later, when he was busy with soap, Zu Guangsan was thrown aside by him.This time I went to Balipo to check the effect of the Fengjia cement plant, and Ning Fei also brought enough light.

He originally wanted to give the Feng family brothers a try, but when he got to the point of speaking, he felt that using this thing as a present was like scolding, so he silently took it back.When he returned to Suzaku Avenue, he was busy with the chores of opening a shop, so he casually put the wooden box containing the foot light at the desk and forgot to put it away.

Brother Feng, on the other hand, had sharp eyes and fixed his eyes on the small wooden box as soon as he entered the door.

He was a polite young man, knowing that he could not ask casually about his master's affairs, so he sat obediently by the side and listened to the chat between elder brother and younger brother Fei.

However, he didn't quite understand more than half of what the two of them were talking about, so bored, his eyes wandered around the small wooden box again.

What's in it?Never seen it before...

Did Brother Xiaofei do something else, is it specially for Big Brother?

But today he also came, so it's not good for the elder brother...

The more he thought about it, the more curious he became, and his heart felt as uncomfortable as a cat's scratching. Little Brother Feng's butt gradually became unable to sit still, and unconsciously began to twist slightly.

Feng Kai glanced at him twice, but it didn't work.Twelve Lang's attention was all on the small wooden box, and he didn't notice his elder brother's sharp eyes at all.

Finally, it became obvious that even Ning Fei had noticed it.

Ning Zaozi followed Xiaodi Feng's eyes to see the small wooden box, and the commercial smile on his face froze instantly.

Shit, why did he forget to put away the foot light, how will he explain it when the brothers of the Feng family ask? !

He was worried, so he didn't notice what brother Mu Ye said before.

Mr. Feng chatted and found no response, so he stopped in doubt, and the room fell into a cold silence for an instant.

This is a little embarrassing.

Ning Fei came back to his senses, gave a dry laugh, and was about to resume the topic.

But at this moment, little brother Feng moved!

At this moment, little brother Feng, he finally couldn't bear the curiosity in his heart, so he dared not look at his elder brother, and stammered and asked Ning Fei:

"Little... brother Xiaofei, why did you put a small wooden box on the case?"

I don't blame Brother Feng, it's because this small wooden box is too abrupt.

The three of them were sitting opposite each other in the room. The Feng family brothers put tea soup and snacks in front of their desks, but on Ning Zaozi's table, there was a cup of clear tea and a small wooden box. It didn't look like they were prepared to give gifts!

But this thing... Ning Fei wiped off the cold sweat in his heart and gave a dry laugh.

"Ah... I made it on a whim... the foot powder."

That's right, it's foot powder, not Zuguangsan. Mozong can't sell fake medicines.

"Foot powder? Is it for washing feet?"

Brother Feng regained his spirits all of a sudden.

I really come here for whatever I want!

Now, every day, he has to count the cleaning kits sent by his "best friend".Those who wash their hair, those who brush their teeth, those who wash their faces, those who wash their bodies, are all neatly arranged in a row, except for one who washes their feet.

The only vacancy made little brother Feng feel a little uncomfortable, always wanting to fill it up with something.

"Ha... yes."

Ning Zazi continued to laugh dryly, making up his mind to hide the effect of Zuguang Scatter.

"Is it sold in the store? Can I get a box?"

Brother Feng was a little anxious, feeling that his lack of heart was about to be filled at last.

"No need to buy, this box will be given to you."

Speaking of this, Ning Fei paused, and involuntarily looked at Brother Mu Ye's calf.

He is now sure that the brothers of the Feng family don't have foot problems, because today everyone is kneeling and they have to take off their shoes when entering the door. So far, they haven't smelled anything too pungent.

So this box of full light is actually of no great use as a gift to the brothers of the Feng family.

Feng Kai noticed his gaze and was a little puzzled, but he didn't ask.On the other hand, Brother Feng responded immediately, happily took the small wooden box, and carefully put it into his arms.

"The usage is very simple. Pour two spoonfuls of medicinal powder into hot water, put the burning paper under the wooden box, and you can see it when you pull it open."

"Don't use too much water each time, just make sure it doesn't go over the back of your feet. You can control the temperature by yourself. Wash for two quarters of an hour."

Although he thought it was useless, Ning Zazi still explained how to use it responsibly.

While talking, Chang came in with Lu Yong to report, saying that the female members of the Feng family had finished shopping and were going back home.

Feng Kai stood up and cupped his hands towards Ning Fei.

"Brother Fei, let's take our leave now. If you have something to do in Ding'an City in the future, you can go directly to the mansion and ask me for help. Kai will definitely do his best."

Ning Fei quickly thanked them and sent the two brothers out.

As soon as they arrived at the front yard, the three young men were taken aback by the spectacular scene in front of them. They saw that the carriage was full of trophies purchased by the women of the Feng family, and the horses couldn't move under the weight.

"This...this...this..."

Little Brother Feng looked at Big Brother.

Before he came, he heard from the third cousin that the ancestor asked everyone to come and cheer for Brother Xiaofei, and he wanted to buy as much as he could.But I never thought that my heart would do so much! ?Two or three years is enough for him to pull these things back!

"hey-hey."

The third cousin, who was about to get into the carriage, saw Brother Twelve at a glance, and ran over happily.

Just halfway through the run, she saw Ning Fei who was seeing off the guests. She was a little shy, but she still gave a blessing ceremony generously.

The folk customs in the border town are open, and the defense of men and women is far less strict than that in the Central Plains. In addition, there are people from the Feng family all around, so it's okay to see outsiders.

"Are you Mr. Ning Xiao?"

The third cousin is familiar with herself.

"The goods in your store are so interesting, next time you have new ones, you must let us know!"

This Mr. Ning Xiao is different from what she thought!She looks to be about the same age as Brother Twelve, her body doesn't seem to be in good shape, her arms are not as thick as hers, but she looks so elegant!

I heard that he is from Xihai country, are all the men there so good-looking? !

Ning Fei smiled and cupped his hands, and responded repeatedly.

Brother Feng disliked the noisy third cousin, and repeatedly pushed her into the car.With Feng Kai around, the third cousin didn't dare to quarrel with her twelfth brother, so she could only stare angrily and return to the carriage sullenly.

In the carriage, Second Miss Feng was sitting on the side. As soon as the third cousin came up, she started talking about Mr. Ning Xiao, saying that she had never seen such a handsome man.

"It's different from my big cousin, good-looking, with delicate features, and it makes people feel warm when they smile."

"Speech is also different, like the ones written in the book... Anyway, it's different from the brothers in the family!"

Second Miss Feng sat in the car, silently listening to her cousin talking about Mr. Ning Xiao.

She sat for a while, and finally couldn't help being curious, and lifted the curtain of the car.

I was seeing a young man in Tsing Yi clasping his hands to bid farewell to his cousin.

He was indeed a completely different person, with handsome features, upright demeanor, and an elegant and coquettish appearance.

Second Miss Feng touched the Dongzhu on her ear, she lowered her eyebrows and eyes, but she didn't know what was in her mind.