In the afternoon, Duan Yun continued to design his injection molding machine mold.

While drawing the mold drawings, Duan Yun was also thinking about other aspects.

One of the biggest problems is the acquisition of Duanyun plastic raw materials.

The safety of electrical products is very important, once there is an electric shock casualty, it will be a huge disaster for Duan Yun.

Although Cao Dong has now contacted several scrap collection stations to buy dozens of catties of plastic materials a month, this kind of purchased waste hard plastic can only be used for the production of antenna amplifier boxes.

If Duan Yun wanted to make a small appliance like a household voltage regulator, he would have to find a better plastic material.

After all, the voltage regulator itself is connected to strong electricity, and has high requirements for insulation, heat resistance and hardness, so it must have a corresponding plastic shell.

In fact, Duan Yun decided to make household transformers this time, on the one hand, to increase income, on the other hand, he wanted to cross the river by feeling the stones, starting from small electrical appliances, accumulating funds and technology step by step, and being able to make more complex and advanced electrical products in the future.

Although with the current domestic policy trend, even if Duan Yun has enough funds, it is impossible to establish a private factory, and the timing and preparation in all aspects are insufficient.

Although Duan Yun was a Ph.D. in electronic and mechanical engineering in his previous life, he was actually only rich in theoretical things, and if he wanted to do more in the future, he must master the technology of actually producing products.

Although this kind of thing is not a high-tech thing in the eyes of some laymen, if Duan Yun can master the technology and ability to produce this kind of shell, it will be of great help to make other products in the future.

After all, whether it is a socket voltage regulator or an electric fan TV, a lot of plastic will be used.

At about seven o'clock in the evening, Duan Yun locked the door of the studio and rushed to the night school on his bicycle.

At this time, many employees in the night school had already sat in the classrooms early.

"Have you heard that the first place in the factory's technical transformation competition has a bonus of 800 yuan, and it can also nominate a model worker......

"A bonus of 800 yuan, my God, the factory has really invested a lot of money this time. ”

"Our factory is very profitable now, what is this money?"

At this time, several young workers sitting in the back row were discussing.

"With such a high bonus, I'm a little excited, in fact, I also have the ability to make some technological inventions, I just didn't want to be too showy before......" Song Guozhong also interjected at this time.

"Squad Leader Song, since you are so talented, you will definitely participate in this technical transformation competition, right?" asked Song Guozhong with a smile as a young worker with a middle head next to him.

"I said it all, I don't like to be in the limelight, the ancients said: the mountain is not high, there are immortals. The water is not deep, and if there is a dragon, it will be spiritual. Si is a burrow, but Wu Dexin ...... The artistic conception of this ancient poem is very good, and it also illustrates a truth, some people do not need to deliberately reveal their abilities, and some people who seem to have abilities on the surface may not actually have real skills......" Song Guozhong's gaze turned to the vacant seat where Duan Yun was, and then said: " It's like a certain classmate in our class, relying on the technical scenery left by the retired master, and the bonus is recommended by the secretary to go to night school, it seems to be very powerful, but this kind of person can also be beautiful for a while, and after a long time, he will be beaten into the original shape, as the so-called seeing him rise up a tall building, seeing him feasting on guests, seeing that the building collapsed......"

"Haha, squad leader Song is really a clear-eyed person,

"Old Song is too talented, it's so good that this building collapsed......"

A few young workers next to him said with a smile.

And at this time, Duan Yun had already strode into the classroom.

After everyone saw Duan Yun, they all twisted their heads to the side and stopped talking about him.

"Duan Yun, where is my fountain pen?" As soon as Duan Yun sat down, Cheng Qingyan next to him turned his head and asked.

"Ah, look at my memory!" Duan Yun slapped his head sharply when he heard this, and said a little apologetically: "I'm really sorry, I forgot to bring it today." ”

After the last exam, Duan Yun returned home and found that he was in a hurry to hand in the papers, and forgot to return the pen to Cheng Qingyan.

Originally, in the afternoon, Duan Yun also brought this fountain pen to his studio, planning to return it to Cheng Qingyan in the evening, but because he was too involved in drawing model drawings in the afternoon, he kept thinking about technical things in his mind, so that when he left, he forgot to bring the pen in the drawer.

"Then when can you give it back to me?" Cheng Qingyan frowned slightly, obviously a little displeased.

"Either way, let's go together in the evening, and I'll go home and get it for you." Duan Yun thought for a moment and said.

"Okay. Cheng Qingyan nodded when she heard this, and said, "That fountain pen is a souvenir of my graduation, and I must take it back." ”

"I'm sorry. Duan Yun apologized repeatedly.

Duan Yun dared to say this, and the math teacher had already walked into the classroom.

At this time, the math teacher was still holding a thick pile of papers in his arms, which were obviously the test papers of the last exam.

"Let's all be quiet, before the lecture, I'll send the papers of our last exam. The students at the watchstand were already full, and the old teacher said with his hand on his glasses.

Zhang Qiang, 76 points. ”

In the 80s, the high school examination paper was a perfect score of 100 points, only biology was a perfect score of 50 points, and a score of 76 in the mathematics mock test was already considered an upper middle score.

As soon as the math teacher's words fell, a young man with a bit of Sven looked like he stepped onto the podium to take the exam paper in the envious eyes of everyone.

"Han Wei, 64 points!"

Guo Guiyi, 68 points. ”

The students whose names were called went to the podium one by one to collect their exam papers.

"Cheng Qingyan, 93 points!"

When the math teacher read out Cheng Qingyan's results, the classroom suddenly resounded with a soft cry of envy.

There is no doubt that Cheng Qingyan's math score is quite high.

In fact, since Cheng Qingyan entered the night school, her grades in this class have always been top-notch, and she is also regarded by her classmates as the most promising student to be admitted to the night school this year.

“...... Finally, there are two more students' test scores that I need to talk about, one is the highest score in this test, and the other student's score is failing......" When the math teacher only had two test papers left on the podium, he suddenly raised his head and said to the students in the audience.

As soon as the math teacher's words fell, everyone looked at Duan Yun and Song Guozhong, who had not yet received the exam papers.

"Awesome, squad leader Song. ”

"He deserves to be the number one talent in our class!"

"Old Song still has it

Several students in the back row praised Song Guozhong.

The thing is clear, Duan Yun only has a first Chinese, and he has just entered the staff night school for a short time, and the one who failed the exam is undoubtedly him.

"Song Guozhong. ”

"It's coming!"

Hearing the teacher call his name, Song Guozhong stood up, subconsciously shook off his groomed shiny parted head, straightened the collar of his tunic suit, and strode onto the podium.

The math teacher on the stage handed the exam paper to Song Guozhong, looked up at him, and said lightly.

"Song Guozhong, you are three points short of passing this time, you have to work hard in the future......"