Several people looked to the door and saw a young man.

is about 1.8 meters tall, with the same separate hair as Andy Lau, with a handsome face, clear eyebrows, a hint of immaturity, and seems to be mature.

A white shirt, blue trousers, leather shoes, a picture of a city man, but with some mud splashes on it, but it is also common in the village.

Director Pan is a little curious, who is this person?

Qin Jianguo's eyes widened: "Xiao Feng, didn't you say that you want to be a tutor near the university and spend this summer on a work-study basis?" How did you get back? ”

"Well, I'm back." Qin Feng nodded, and then walked towards Director Pan.

"Director Pan, this batch of rubber shoes does have quality problems, all blame our negligence, after receiving your order, we rushed to work day and night, and some of the rubber shoes production process went wrong, and it just so happened that this batch of goods from your supply and marketing cooperatives are this batch of shoes." Qin Feng said: "As long as we reprocess it, the shoes are guaranteed to meet the military quality." ”

"What went wrong?" Director Pan looked at Qin Feng: "How do you know?" ”

Even Qin Jianguo was stunned, he got the opportunity to go to the 3513 factory for a few months last year, and he had already learned the craft of producing rubber shoes, how could there be a mistake?

"Because I'm a top student at Capital University." Qin Feng puffed out his chest proudly.

Capital University? The expression on Director Pan's face froze for a moment.

Even if there are many college students in later generations..., a brick falling from the sky can hit the head of the college student, and the top students of Capital University are also enviable, not to mention that now, secondary school students can become cadres after graduation, and the last university is the pride of the sky, the students of Capital University, that is the existence that everyone looks up to!

"This is my student ID."

Qin Feng flipped through his trouser pocket and took out the red paper, these days, the student ID card is more useful than the ID card, after all, you can get a half-price ticket by car, and you will definitely need to use it when you go home.

Director Pan glanced at it, but didn't take it for inspection, and a smile appeared on his face: "Director Qin, your son is actually a student at Capital University, and he has a bright future in the future!" ”

Qin Jianguo's face showed a proud smile: "Yes, this kid can go to Capital University because of the smoke coming out of the ancestral grave of our old Qin family..."

"Director Pan, when I go in the summer, it will be my senior year, and I will graduate in one year, and I don't know which unit I can get into, but I will definitely be able to stay in the capital, you are an old customer of our rubber shoe factory, if you need help in the future, just come to me."

"Okay, good, Director Qin, your son will definitely be able to become a big official in the future... That, Xiao Feng, are you sure you can get your shoes straight? ”

"Of course." Qin Feng said: "Let's go to the back workshop, take a pair and try it first, if it can't achieve the effect I said, it's not too late for us to talk about returning the goods." ”

After speaking, Qin Feng picked up a new pair of rubber shoes from the carton, and the side of the rubber shoes had been stamped with the seal of Fengtai Supply and Marketing Cooperative.

Liberation shoes, the full name is called rubber-soled cloth shoes, black rubber soles, yellow (green) rubber uppers, green canvas uppers, so it is also called green rubber shoes, it will turn yellow after wearing it for a long time, and there are places to call it yellow rubber shoes, referred to as rubber shoes.

The Liberation Shoes are made of rubber and cloth and are very lightweight, making them much more suitable for long marches than bulky military boots. The rubber sole is soft, and the toughness and elasticity of the rubber sole are strong. Its sole is thinner than that of military boots, and its grip is naturally stronger when climbing mountains. In muddy conditions, liberation shoes are not easy to slip on, and they are also relatively comfortable to wear.

On the Korean battlefield, the multinational coalition troops wearing bulky military boots were beaten back to the 38th parallel by the volunteers wearing liberation shoes.

The beginning of the liberation shoes is only for the army to use, because the production process of this kind of rubber shoes is not complicated, so some local shoe factories began to produce this kind of rubber shoes, although the quality is not as good as the military products, but it is still very good to sell to the village people to work in the field, many people buy a pair of rubber shoes can wear more than ten years.

Qin Feng's father also saw the market for rubber shoes, and when he came back from the 3513 factory, he thought he had mastered all the techniques, rented the abandoned factory here, hired more than 20 people in the town, and was ready to do a big job.

It's a pity that my dad still has no vision and no ability.

In the past ten years, the country has opened, young people have not looked down on rubber shoes, travel shoes, sports shoes, leather shoes, all kinds of shoes in endlessly, the rustic rubber shoes market has gradually shrunk, and many emerging workshop-style small private shoe factories are also producing rubber shoes in large quantities, this market has long been saturated.

Dad's technology has not been learned, the quality of the rubber shoes made is too poor, the use cycle is only three months, and it will be broken after three months!

Therefore, I started selling goods in May, and I encountered the first batch of returns in August, and then there will be more and more, the factory is not operating well, and it had to close at the end of the year, and I still owe a lot of debts, which will not be paid off until Qin Feng goes to work.

Dad originally planned to make a lot of money and let the family live a good life, but he didn't expect it to drag down his son, and from then on, he was depressed, and a few years later...

Now that Qin Feng is back, he must not let his father repeat the mistakes of the past!

In the back, many people in the production workshop poked their heads out, they had already heard the quarrel in front, and they were also very anxious.

The rubber shoe factory is working at the door of the house, much better than going to the capital to work, they don't want the shoe factory to go out of business, but the quality of the shoes is poor, they also know it, after all, the first batch of shoes produced by the shoe factory, give them a pair of benefits per person, and now, the shoes on their feet have also begun to show their big thumbs, broken soles and so on.

Lao Qin's son is a college student, maybe he can really solve the problem?

As soon as he walked to the townhouse in the back, Director Pan suddenly covered his stomach: "It's not good, I have to go to the toilet." ”

"Well, go ahead." Qin Jianguo watched Director Pan leave, and then asked Qin Feng nervously: "Xiao Feng, what is wrong with our process?" ”

"Vulcanization." Qin Feng said simply.

"Vulcanization? What is vulcanization? ”

"It's the last step to put the shoes in the pot and steam them." Qin Feng said: "Dad, when you were in the shoe factory, didn't you see that when people were steaming, you put sulfur in it?" ”

"Put brimstone? What's the use? ”

"Vulcanization."

"What is vulcanization?"

"You don't understand." Qin Feng had no choice but to popularize science: "Rubber becomes soft when heated, becomes hard and brittle when cold, and is easy to wear, all of which are determined by the double bond structure within the molecule. In order to improve the performance of rubber, it is necessary to make the raw rubber in the rubber react with the vulcanizing agent chemically, so that it can be cross-linked from the macromolecule of the linear structure to the macromolecule of the three-dimensional network structure, so that the rubber material has excellent properties such as high strength, high elasticity, high wear resistance, corrosion resistance and so on. This process is called rubber vulcanization. ”

Qin Jianguo's eyes widened, indicating that he didn't understand.

"You don't need to understand the principle, just watch me operate it now, find a few pieces of sulfur." As he spoke, Qin Feng had already come to the last link of the production line, looking at the steel round main tank more than one meter high that was erected next to the boiler.

The scientific name of this tank is called vulcanization tank, and the shoes that have been formed will be put into the inside of the vulcanization tank, layer by layer, similar to the cage drawer of steamed buns, and the high-temperature fumigation of saturated steam is used to complete the vulcanization process of the shoes, so that the rubber shoes have higher strength and elasticity.

Dad did imitate it vividly, but unfortunately, he still couldn't get home! Although there is a boiler to burn steam to fumigate the vulcanization tank, however, there is no sulfur, the simplest vulcanization material, in the steam, how to vulcanize rubber shoes?

The best way is to put the vulcanizing agent directly in the rubber to melt and mold together, but with the current technology of Pingwang rubber shoes factory, it will definitely not be able to reach it, so it is better to use this way to make up for the dead.

It just so happened that the new batch of rubber shoes had just been put in, and they had not yet started steaming, so Qin Feng put the rubber shoes of the Fengtai Supply and Marketing Cooperatives in his hand, threw in a few pieces of sulfur, and then closed the lid.

Unconsciously, a large number of workers in the workshop came around, including men and women, old and young, with eyes full of anticipation.

"Vulcanization can be divided into four stages, which are called induction, presulfurization, positive sulfurization, and persulfur." Qin Feng introduced while operating: "Different stages require different temperatures and pressures, now I'll operate it first..."

Qin Feng got busy, observing the pressure gauge and temperature gauge of the boiler, sometimes closing the valve to increase the pressure and temperature, sometimes opening the valve, and the surging steam blew into the vulcanization tank, making a snorting sound.

The big guy looked at it, his eyes full of envy.

College students are amazing! Theory meets practice!

Knowledge is power!

Director Pan didn't know when he squeezed in, and looking at Qin Feng's operation, he was also full of admiration.

Fifteen minutes later.

"Okay, the vulcanization process of this tank is over, everyone pay attention, be careful of high-temperature steam scalding, I'm going to open the can!"

The vulcanization tank was opened, and Qin Feng picked out the rubber shoes he had put in with a bamboo pole and put them on the table next to him: "Director Pan, look at these rubber shoes again, if you can break the soles, we will refund you in full, and then double the loss!" ”

The shoes quickly dried to room temperature, Director Pan reached out to break them, the soles of the rubber shoes were very soft, just like noodles, kneaded casually! The handwriting of Fengtai Supply and Marketing Cooperatives also moved back and forth with the soles of the shoes, becoming ovals, and then restored.

"Sure enough, it was caused by a defect in workmanship. Director Qin, your son is amazing! Director Pan nodded: "The top students of Capital University are cows!" I won't return them either, you took off the shoes from the car for me, reprocessed them and sent them back to me! ”

"Okay, quick, big guy go help and get the shoes from the car here!" Qin Jianguo's face was flushed, great, his son solved a big problem for himself!