The busy farming season has passed quickly. Considering that he is now getting
paid monthly, it is not really good to give students a few months' leave. With
the help of the enthusiastic villagers in the village, his family's food is
very fast. After receiving it, a month later, a new semester begins.\nFor the children studying in Huajia Village School, Qu Qing is not only a
teacher who teaches them to read and write, but also their idol.\nIn their eyes, Mr. is not only handsome, rich in knowledge, and gentle, but
also dares to think and do, and he will definitely be able to do it.\nHe said he wanted to invite talented people to teach them, but in the end he
actually invited all the talented people from Shili Baxiang. Vigorously,
everyone praised, and even took this opportunity to take them to see the
county magistrate, and at the same time provided each of them with a pen and
paper; he said that he wanted to teach them to learn to seek justice, which
really made Xu Nian In the past year, I got justice, and let the village
tyrant Hua Da Niu honestly admit that he lost money...\nWhat he said, some people would say that he was just whimsical at first, but
as he did everything with vigor and vigor, the students no longer had any
doubts about him.\nEven though there are many other teachers in the school now, Qu Qing, the so-
called head teacher, has an irreplaceable position in their hearts. In the
eyes of all students, Qu Qing is the biggest teacher in this school, the head
of this school. people.\nNow the teacher said that he would take them to make paper by himself, and
none of them in the whole class of twenty or thirty doubted that he could not
do it.\nBut obviously the people in the village did not admire them as much. When many
people heard the teacher say that they wanted to make paper, no one believed
that Qu Qing could really do it.\n"It's really whimsical, forget about other petty things, how can papermaking
be so easy, if you can make paper by soaking a few bamboos, everyone in the
world can make paper, and I can also make paper hahaha."\nThe person who spoke was Hua Qiang's father. Hua Qiang showed off his
teacher's deeds, but he didn't expect that his father would not give face at
all, but laughed at the side.\nHua Qiang blushed suddenly, stalking his neck and said loudly: "Dad, wait and
see, our teacher can do anything, he said that if we can make paper, we will
be able to make paper, and then our classmates will be able to make paper. ,
Including me, you can have free paper in the future!"\nFather Hua Qiang tutted: "Who wouldn't brag? I also said that in ten years'
time, I can increase the output of rice in our fields tenfold."\nWhen they were talking, there was an oops next to them, and the two looked
out, and found that Hua Qiang's mother in the kitchen was looking at the pile
of ashes burning with distress and self-reproach.\n"What's the matter?" Hua Qiang hurriedly went over with his father to see.\n"Master, when I was taking the salt just now, I accidentally spilled more than
half of the salt into the ashes. Oh, what can I do? These salts are worth a
lot of money." Hua Qiangniang looked at the ashes with sorrow. , it hurts so
bad.\nAlthough salt is not expensive, it is a lot of money for people who donât have
a big income and canât even get enough to eat every year. I managed to save
some of them, but they were already covered with ash, and the rest were almost
fused with the ashes of plants and trees.\nThe mother of flowers took a small pot and put all the ashes into the pot. She
knew there was no way, but she was reluctant to throw the salt away, but there
was no remedy.\nShe looked at the pot of ashes with distress, and almost cried: "These salts
are half a catty, how many eggs have to be sold to get them back, it's all my
fault, how come my hands are like chicken feet, even a bag of them? I can't
even catch the salt."\nHua Qiang's father also felt a little distressed next to him: "Oh, it's really
bad blood mold, and it will fall down, what can I do now... Hey, Qiangzi,
didn't you say that your teacher is omnipotent, you go ask Ask your teacher to
see if he can get the salt out of the ashes."\n"How is this possible!" Hua Qiang's eyes widened, his father was clearly
embarrassing people, how to separate the salt that was almost as fine as ash.\n"Look, your husbands have something they can't do. You can't even do this
little thing, and you still make paper."\nHua Qiang was unconvinced and said loudly: "Who said that our teacher can't do
it? There will be a teacher's class in the afternoon, and I will ask in the
afternoon. If our teacher can do it, you will have to admit it convincingly.
Our teacher is really good!"\n"Okay, okay, I'm here waiting for your good news, don't move the pot of ashes,
my daughter-in-law, today I want to see how this stinky boy turns corruption
into magic!"\nHua Mu looked at the childish father and son speechlessly, but she also held a
glimmer of hope in her heart. Qu Qing knew so much, what if he really did it,
after all, so much salt was thrown away like this, she I really hate it.\nWhen it came to class in the afternoon, Qu Qing was about to teach the songs
prepared in advance, when he saw Hua Qiang, the student sitting below, raising
his hand, as if something was happening.\nAfter listening to what happened, Qu Qing asked him to sit down, put the
lesson plan in his hand on the podium, and said, "In this case, today's music
class will be cancelled, and I'll give you a chemistry class... Hmm, what is
chemistry? I canât tell you right now, so letâs understand the course of
refining things temporarily. As for the salt, it can be separated from the
ashes, no problem at all.â\nWhen Hua Qiang made a promise with his father, he actually didnât have a clue
in his heart, and he was afraid that he would lose face to his teacher, but at
this time, seeing his teacherâs confident voice, the big stone in his heart
finally fell, and then he was beaming with joy. stand up.\nQu Qing and Hua Qiang discussed it, and finally, after obtaining the consent
of his parents, Qu Qing told the students in advance the etiquette and
agreement for going to other people's houses. He went to Hua Qiang's house in
a mighty manner.\nThe flower mother and the flower father wanted to warmly invite him to sit in
the house, but Qu Qing waved his hands to thank them for their kindness: "I'll
just have the children and I have classes in the yard. I have to trouble you
today."\nFather Hua said, "Where is it?"\nAfterwards, the couple saw that twenty or thirty students automatically stood
in two rows according to their heights, each with a handful of weeds picked
from the road in their hands, and then Qu Qing said that everyone sat down in
place, All the children in the school put the weeds on the ground neatly and
sat on the ground like this.\nOriginally, they were still worried about a bunch of children coming, how to
prevent them from making trouble, and they even locked the doors of the two
rooms in advance. Unexpectedly, under the discipline of Qu Qing, the famous
troublemakers in the village were still obedient. Sit down, even if you keep
making small movements on your hands, you still sit on the ground and don't
run around.\nSeeing that their son was well-behaved, straight and serious, completely
different from what he looked like at home, Hua Qiang's parents felt a strong
sense of relief in their hearts, thinking that they could meet such a good
teacher for free , really worth it.\nQu Qing first asked the father and mother, who were standing next to him, to
move out of the bench and sit down. Looking at the solemn atmosphere, the
mother said to her husband next to her excitedly, "We are still taking classes
with Mr. today?"\nFather Hua was also a little excited, but he still pretended to be reserved,
but the shaking legs betrayed his mind: "Yeah."\nSeeing that Qu Qing was almost ready, he clapped his hands, and the children
who were excitedly moving and talking to each other suddenly became quiet.\n"Okay, let's start the class. What we are going to learn today is the
properties of salt and the method of refining." Qu Qing brought the pot of
salt ashes to the crowd.\n"As you can see, the salt has fallen into it, but it has been mixed with the
ash. It is impossible to separate them by ordinary methods, but as long as we
learn the characteristics of salt, we can easily separate the salt from it. ,
Let's think about it first, what's the difference between salt and marl?"\n"Taste? Salt is salty! Mud tastes awful."\n"Salt is white! Grain by grain."\n"Salt can cook, but ash can't!"\nEveryone expressed their opinions in vain. Qu Qing deliberately guided them to
think. Although they did not answer the key point, at least they would think
carefully. His goal was generally achieved. nodded.\n"Actually, what everyone said is correct, but today we are going to take
advantage of the difference, and no one thought of it," he said after
deliberately selling out, "Salt is soluble in water, but mud and plant ash are
not, think about it. , a cup of hot water, put a little salt in it, will the
water become salty after a while?"\n"Seems to be."\n"But teacher, I think you're wrong. Mud is also soluble in water, mud and
water."\nQu Qing did not get angry because of the questioning, but nodded with a smile
and praised the students who dared to question him.\nEven the flower mother next to her couldn't help but said, "Yeah, but if you
put mud in hot water, it will smell like mud after a while."\nFather Hua patted her hand: "You can talk nonsense here? I'm sorry, sir, you
continue."\nQu Qing smiled: "It's okay, the question is very correct, but here I want to
explain, even if the dust falls into the water, it is difficult to pick it up
all of a sudden, but this does not prove that he melted in the water, and it
is different from salt. Yes, the salt dissolves in water and completely melts
into the water, but the mud is different. After the mud and water are left for
a while, the mud will still sink to the bottom, which is obviously different
from the water, but the salt will not sink to the bottom. This is their
difference.\nToday we are going to take advantage of this different characteristic from mud
to extract the salt, first add water, let the salt melt in the water, then
filter the brine and mud, and finally dry the water, and the salt will be
extracted again. The principle is this, and now I will demonstrate it to
everyone. "\nAs he said that, he asked the mother and father to prepare hot water and a
larger pot, and also asked for a piece of cloth as a filter, and then lit a
stove.\nSome idle people in the village noticed the movement here. They heard that
they were coming to Hua Qiang's house for a class. They suddenly ran over to
watch with some curiosity, and whispered about what class this was. Teacher Qu
Qing has a lot of tricks in a day, and they are all very interesting.
Sometimes they wonder if he has taught the students to read and write. This is
completely different from the schools they know.\nQu Qing poured the salt ash into the large basin, and then poured it with a
pot of hot water: "This is our first step, let the hot water melt the salt
first, here's a little bit, why not use cold water, this involves When it
comes to another characteristic of salt, the higher the temperature, the
faster it melts, so if it is cold water, it will be slower. There is no
difference in this experiment. If you are interested, you can go home and test
it with hot and cold water. "\nThe onlookers immediately knew that it turned out that salt and mud were mixed
together, and they wanted to extract it. This was interesting, and they were
very curious about what this gentleman was going to do.\n"In order to help melt in the middle, stir with a wooden stick to confirm that
all the salt is melted, and then start the next step, oh right, here is
another characteristic of salt, the concentration of the solution is equal
everywhere, for example, if you drink salt in water, Stir well, and after all
the salt has dissolved, the water everywhere is the same salty.â\n"Now that the salt has melted, now we wait for the mud to settle down to the
bottom of the basin, and then pour the water into another basin through the
filter, which is to filter the mud."\nHe did not panic at the same time, and seemed to be in good order. After
waiting for ten minutes, after the mud settled, he asked the two adults who
were onlookers to help him, carefully lifted the basin, and used a filter
cloth to filter the salt water to the other side. inside a pot.\n"Now that we have clean brine, and the mud is real mud, it can be thrown away,
and now we start to boil the salt."\nAs he spoke, he put a small pot on the stove next to him, scooped water into
the pot with a ladle and started cooking, constantly gathering firewood.\nThis is a relatively boring process, but soon, when a pot of water is about to
dry, everyone sees with wide eyes that salt crystals actually appear in it! As
the salt water becomes less and less, the salt in the pot becomes And more and
more.\nSeeing the shocked expressions of the people around him, Qu Qing's expression
was still calm: "Part of the seawater is extracted from the sea, but people at
the seaside don't use firewood to boil it, but get salt by drying the
seawater, but drying it from the sea. The salt produced cannot be eaten
directly, it has to be processed, and I donât know the specifics, so I wonât
say it. In addition, it is illegal to make salt privately, so please donât do
it.â\nAfter saying this, the villagers who were watching outside, including the
students, laughed: "Let's go to make salt there. I don't know how many miles
away from the sea."\n"I'm joking." After Qu Qing finished speaking, everyone laughed.\nAfter seeing that the sun was almost up, Qu Qing saw that everyone had also
learned, so he asked the students to take the things they brought and go home
after school. Hua Qiang's parents said that they could do it themselves and
invited him Stay for dinner.\nQu Qing politely refused, and then instructed: "In fact, the water has been
boiled like this all the time, and when it is boiled, the salt will come out.
Although a little bit was lost in the wet mud, those things can be ignored.
Thank you very much today. You take care of my kids."\nAfter some courtesies, Qu Qing said goodbye and went home for dinner.\nHua's father looked at the back of Qu Qing's departure, and reached out and
patted Hua Qiang's head: "Son, your teacher is really good, you have to follow
along and study hard, and it's not in vain for me to study for you."\nSeeing the admiration in his father's eyes, Hua Qiang immediately raised his
chest proudly: "Of course."\nFather Hua quickly went to brag with the neighbors, and while proud of his
son, he said: "Hey, sometimes I really envy these stinky boys. If I was born
ten years later, I would also like to sit in the school and study with you.
Don't say it, it's quite interesting to listen to this class, I'll know it as
soon as I learn it."\nNeighbors also nodded in agreement, talked for a long time, and finally sighed
sincerely: "It's really good to study."\nThe author has something to say: these chapters are probably idle little
things, but the main expression is that the protagonist himself does not
realize that some of the ideas he spreads are already subtly affecting the
people around him.\nI remember that it seems to have been mentioned in "A Brief History of
Humanity" or something about why there is such a huge difference in the modern
development of China and the West. There is probably a point of view that the
mainstream thinking in the West dares to admit that they are ignorant, so they
dare to pursue it. Truth, this is also an ideological basis for the later
scientific and technological revolution.\nThe protagonist is definitely unable to bring about a technological
revolution. Many things are too difficult. It is impossible for ordinary
people to build steam engines in a world without any industrial foundation,
but he can spread his ideas of pursuing science to ancient times. In my
opinion, it's always been an amazing thing~\nThanks to the little angel who irrigated the nutrient solution: 1 bottle of