As a household name in later generations and a basic skill that every student must master, eye exercises did not exist in this era. The earliest systematic eye exercises originated in Beijing in 1960, twenty-three years later.
But it is undeniable that the need to protect eyesight exists in all eras.
This is the first cross-generational product that Yu Hua came up with after meeting Zhou Yuan, Liu Tao and other classmates.
Although eye exercises are small, they can do a lot to protect your eyesight.
When Liu Tao heard this, his face was very serious, and he was extremely moved in his heart. He bowed again and said, "Thank you, classmate Yu Hua, for imparting his family secrets. We express our gratitude and we will never forget each other in the future."
move.
I was extremely moved.
Liu Tao was able to obtain an extremely precious method of protecting his eyes. This was an opportunity for him and his classmates. It is not difficult to see that Yu Hua can become the only student in the class who is not myopic and escape from this set of eye exercises that are comparable to ancestral secrets.
It doesn't matter.
There are twenty-two people in the first class of Neo-Confucianism, and twenty of them are short-sighted. The only ones who are not short-sighted are Yu Hua and Zhao Anyuan.
In Liu Tao's view, the set of eye exercises given by Yu Hua is definitely a family secret, worth tens of thousands of dollars, and its value is immeasurable.
"I'm waiting for classmate Xie Yuhua to teach you the secret eye protection skills."
Zhou Yuan and other classmates bowed to Yu Hua one after another and faced Yu Hua as students.
"..."
When Yu Hua saw Liu Tao, who showed his sincere feelings, and Zhou Yuan and other classmates, he couldn't laugh or cry. Could this set of eye exercises be a secret passed down from family to family?
Then the tenth set of radio gymnastics in later generations and the times are calling, should it be called peerless martial arts?
Okay, I am helpless, but this feeling is quite comfortable.
"This set of eye exercises is not a family secret, it is something I usually ponder. You don't have to do this. In addition, if there is no space in the library, we can also pool some money to buy a battery and lamp outside the school to make portable lighting.
The light source is used in the dormitory for everyone's use." Yu Hua continued modestly.
The lights in the dormitory are turned on for a very short time every day. Self-study ends at ten o'clock every night. The lighting time after class is only half an hour. The light bulbs are not on yet. After the lights are turned off as usual, all students in the dormitory light kerosene lamps to study.
If you have a portable lighting source, you can easily study until 12 o'clock in the evening.
"Making a lighting source?"
Zhou Yuan was stunned for a moment when he heard Yu Hua's words.
"Classmate Yu Hua, can you make an electric light?!" Liu Tao stared at Yu Hua, his words a little surprised.
The other three students all focused their eyes on Yu Hua, and their expressions were not far different from those of Zhou Yuan and Liu Tao.
Everyone was surprised at Yu Hua's suggestion.
"Of course, the portable lighting source is not complicated. It only requires batteries, inverters, lights, circuits and circuit switches. It is mentioned in the physics book. What's wrong with you classmates?" Yu Hua was confused and a little confused when he saw everyone's reaction.
Puzzled.
Getting a portable light source for use in a dormitory is as difficult as having one.
Seeing Yu Hua's puzzled face, Zhou Yuan, Liu Tao and other classmates looked at each other with helpless expressions on their faces.
"Yu Hua, to be honest, I, I, and I don't know... I have never done any physical circuit experiments, and my husband has never taught us how to make them."
Zhou Yuan organized his words and told the truth. At the end, he sighed softly: "The important thing is that we never thought that we could also make electric lamps for lighting and reading."
Liu Tao and his three classmates remained silent, a little ashamed.
As students in science classes, everyone has naturally learned the physics knowledge about circuits and electric lights, but from the time they came into contact with physics until now, they have done very few physical experiments. It can be described as only a handful.
As for the experiment on electric circuits and lights, this thing exists entirely in books. No one has ever done any related experiments, so it is very unfamiliar.
But what matters is not these things, but thinking.
Everyone in Dormitory No. 2 has been reading science books for so long, but they have never thought of using the knowledge in physics books to apply them in real life.
This is the gap between them and Yu Hua.
"It's okay, I can make it. I will go out to buy a battery and a light this weekend, but I need everyone to contribute." Yu Hua looked calm and calm. It is not easy to build a portable lighting source without any technological content.
These days, batteries are car accessories and are classified as luxury goods. They are expensive. Inverters and lights are also expensive. Coupled with the miscellaneous copper wires and switches, a complete set of accessories can cost up to thirty yuan.
Around the ocean.
My dear brothers, let us settle the accounts.
Since you want to build a portable lighting source, unless you use it alone, everyone in the dormitory must contribute together.
"No problem, I'll pay half of it directly." Zhou Yuan was overjoyed when he heard that Yu Hua could handle it and immediately replied.
After realizing the importance of light sources to the eyes, Zhou Yuan was extremely dissatisfied with the kerosene lamp on his desk and began to look forward to using the portable dormitory light source made by Yu Hua.
Liu Tao shook his head and said: "Equality, equality is the most important thing. Classmate Zhou Yuan, how about everyone except classmate Yu Hua, each of us shares half of the cost?"
"I don't agree. Since it is used by everyone, I should contribute the money. It is unreasonable for both public and private purposes." Yu Hua shook his head and raised his hands to object.
"Okay..." When Liu Tao saw Yu Hua's firm gaze, he opened his mouth and wanted to say something else, but stopped and had to agree.
"I agree to fund it."
"I also agree to invest."
The other two boys raised their hands in agreement. They can use the electric light and protect their eyes. This is a killing two birds with one stone.
"I agree. In addition, my father has a friend who owns a Ford car repair shop. You can buy it from there. The price can be 20% cheaper than the market. A nickel-iron car battery only costs 15 oceans. The price of light bulbs and other items
I can save 20% to 30%. Tomorrow I will write to my father and ask him to buy the corresponding equipment." Classmate Ji Han raised his hand in agreement, and then informed his family's situation.
When Yu Hua heard this, he secretly smacked his lips. They were indeed gods. He drove the Ford car maintenance workshop quietly and looked at Ji Han: "The light bulb needs 100W power. This brightness is enough for dormitory use. I will write a list of materials for you."
You, please report the cost to us and we will share it equally."
"No problem, I'll put the money down first, and the materials will be ready in two days." Ji Han said bluntly, looking generous and frank.
"good."
Just do it, Yu Hua was not polite and agreed directly. He took out a pen and scratch paper, sat at the table, wrote down all the materials needed to make a portable lighting source, and handed it to Ji Han.
With the current knowledge base, is it difficult to research portable lighting sources with no technological content?
No.
Although, Yu Hua has never made a portable lighting source.
It’s good to start with portable lighting sources when engaging in technology.
Zhou Yuan looked forward to it, while Liu Tao and the other two classmates surrounded Yu Hua, staring at the materials on the draft paper with a trace of desire in their eyes.
This is the desire for light.
As a student, I long for light the most, because light symbolizes being able to read books and absorb knowledge.
"Here, the list of materials is ready for you." After a while, Yu Hua finished writing the list of required materials, put down the pen, and carefully checked whether there were any mistakes. This was the first technological product he was about to research during the Republic of China.
Must be careful and careful.
After checking, he handed it to his classmate Ji Han.
Ji Han quickly took it and put it carefully in his arms. Then he sat down and wrote a letter, preparing to hand it to his husband and mail it to his father tomorrow.
Taking advantage of this opportunity, Yu Hua sat down again, wrote out the eye exercises again, and taught them to everyone. He also asked that there was no need to keep it secret and that he could teach it to his classmates at will.
As if they had found a treasure, everyone was learning eye exercises and treating it with care, not daring to make any mistakes.
"You can practice eye exercises first, I'm going to wash up first." After finishing his work, Yu Hua smiled when he saw everyone, picked up his plastic basin and toothbrush cup, turned around and left, and went to the toilet to wash up.
It was freezing outside the dormitory and the wind was howling.
Fortunately, the toilet still has a hot water supply from the school's boiler room, which is reserved for the last batch of students returning to the dormitory from the library to wash their faces and mouths and quickly take care of their personal hygiene. After Yu Hua returned to the dormitory, he found that Zhou Yuan and others were
Do eye exercises.
His posture is upright and his face is serious, much like a primary school student doing eye exercises.
Returning to the dormitory, Yu Hua glanced at the people doing eye exercises, did not disturb them, got on the bed, wrapped himself up and fell asleep.