A powerful country in scientific research

After Director Zhao left, Su Ran and Wang Zhibin went back to work.

The difference between color TV signal transmission and black-and-white TV signal transmission is that in addition to the brightness signal, there is also a chrominance signal. The color TV receives these two signals and decomposes them into three (red, green, and blue) brightness signals after processing to modulate the corresponding electron guns.

Each pixel on the color cathode ray tube screen is composed of a combination of red, green and blue paints. Three electron beams activate the three colors of phosphorescent paint respectively. The desired color can be obtained by adjusting the brightness of the three colors with electron beams of different intensities. This is very similar to the color mixing process in painting.

Starting today, Su Ran and Wang Zhibin began the research and development of cathode ray tubes in the laboratory.

After putting on their work clothes, they walked to the laboratory table. Various instruments and equipment were densely placed on the table. Su Ran placed the drawings on it.

Wang Zhibin was soldering parts on the circuit board, checking whether every detail met the standards, while Su Ran was working on the electron gun.

The two of them discussed from time to time, and the whole laboratory was filled with an atmosphere of concentration and excitement. Every little progress would cause them to cheer and get excited.

lunch time.

Su Ran did not go to eat. She gave the lunch box to Wang Zhibin and asked him to bring back a portion after he finished eating. She wanted to take advantage of the lunch time to call her dear "boyfriend" He Cheng.

Su Ran picked up the phone and dialed He Cheng's number with mixed feelings. After a few rings, a woman's voice came from the other end of the phone: "Hello, this is Qinghe Oil Pressing Factory, what can I do for you?"

Su Ran felt that the voice was somewhat familiar, "Hello, I'm looking for He Cheng."

The woman on the other end of the phone didn't react much. Most of the people who called their factory wanted to see Director He.

"Okay, comrade, please wait a moment. I'll go find Director He."

Su Ran: "Okay, thank you."

After a while, a familiar and pleasant male voice was heard on the other end of the line.

"Hello, hello, I'm He Cheng."

When Su Ran heard He Cheng's voice, her heart was beating fast. "Did Director He eat?"

Hearing this familiar and charming voice, He Cheng couldn't help but curl up the corners of his lips, "Eat it, has your girlfriend eaten it?"

"No, I'm just calling you during lunch time." Su Ran said with a smile.

He Cheng frowned, "Eat first next time. Eating on time is good for your health." Especially for people like Su Ran who forget to eat when they are busy, they must eat on time!

Su Ran: "I'm not skipping meals, I just didn't go eat now. I asked Engineer Wang to call back for me. By the way, Engineer Wang and I are at the TV factory now. We'll be here for a while. If you have anything to do, call here instead of the machinery factory."

He Cheng: "That's good! Why did you suddenly go to the TV factory? Any new research?"

Su Ran said "hmm". She didn't deny it, but she didn't elaborate either.

He Cheng keenly noticed something and didn't ask any more questions.

"Is Auntie still that busy? Are grandma and grandpa adapting there?"

Su Ran smiled and replied, "My mom is always so busy, she's used to it~ Grandma and grandpa are used to it. Grandma is busy taking care of the kids with Grandma Lin upstairs every day, and grandpa is busy playing chess. They live a very comfortable life. Oh, right! My mom has developed a new product, smoked chicken legs~ I think it tastes very good. How are the chickens in your farm growing? Do you want to cooperate with the Hongqi Food Factory? It seems that my mom's factory is looking for a cooperative factory again."

He Cheng:!!! The surprise came too suddenly!!

But the chickens in their factory are too small...so sad!

"The chickens in our factory are still young. If we want to make cooked food, we need to raise them for at least another three months."

Su Ran: "Indeed, it's okay, I just asked in advance. If you are interested in cooperation, I will ask my mother for you."

He Cheng raised the corner of his lips, "Of course I am interested! I couldn't ask for more." His tone was full of smiles.

Su Ran nodded slightly, then she realized that He Cheng couldn't see it, so she said, "Okay, I'll ask my mom tonight."

He Cheng: "Okay! How are you doing recently? Are you happy to be back in a familiar place?"

"Of course I'm happy. By the way, I met Wu Hongying when I was shopping with my grandma on Sunday, but we didn't talk for long because I was busy at that time. I was still thinking about when I would be free to visit Hongying at the food factory. As a result, when I got off work yesterday, Hongying and the others came to see me~ and then we went to the state-owned restaurant to have dinner together~" Su Ran pouted.

"They? Who are they?" He Cheng paid attention to the key point. Could it be that someone deliberately approached Su Ran while he was away? ! This is not okay! !

Su Ran didn't know what he was thinking, so she replied, "Wu Hongying, Xu Kai, Wang Yanyan, the three of them. By the way, you and Xu Kai told me that we were dating, why didn't you tell me? I almost let it slip."

He Cheng felt a little guilty. Could he say that he was so excited when they first started dating that he notified everyone around him who was close to him?

He smiled guiltily, "Don't I think that if more people know about it, there will be less trouble? Isn't it common for classmates to introduce each other to each other?"

Su Ran couldn't deny what was said. After all, both she and He Cheng had received many love letters when they were in school. Telling their classmates could indeed save them a lot of trouble!

"Okay." Su Ran remembered the gentle female voice just now, and asked, "Who answered the phone just now?"

He Cheng: "It's Zhao Lan, also an educated youth. Do you remember her?"

"Remember, I was wondering why that voice just now sounded so familiar. By the way, how have you been these days?" Su Ran said with a smile.

He Cheng: "It's fine. Apart from being a bit busy, everything else is fine! Do you have time this Sunday?"

Su Ran was puzzled, "I think so, what's the matter?"

He Cheng chuckled, "This Sunday, we are going to deliver oil to the department store. If you are free, let's have a meal together."

"Okay, then tell me in advance when you will arrive, or you can come to my house directly to find me." Su Ran said with a smile.

He Cheng: "Okay!"

The two chatted for a while, talking about the recent situation of the oil mill and the farm. Time passed unknowingly until Wang Zhibin came in with a lunch box. Su Ran saw him and said to He Cheng on the phone: "My meal is here, I'm hanging up!"

He Cheng smiled faintly, "Okay, I'll be there on Sunday, see you then."

"Well, see you then."

After hanging up the phone, Su Ran took the lunch box from Wang Zhibin with a smile and started to eat. I have to say, the TV factory is indeed a big factory in Hai City, the food tastes really good!