A powerful country in scientific research

In the afternoon, Su Ran, who had finished the electric heater, started a new project - air conditioning.

It is the second half of 1975. China already has air conditioners, but most of them are imported from foreign countries. China has not yet completely independently produced air conditioners. Moreover, due to economic constraints, its popularity is relatively low and it is mainly used in some high-end buildings and industrial fields. It has only been rapidly developed and popularized after the reform and opening up. It was also after the reform and opening up that China had its first air conditioner factory.

Since Su Ran came to this world, she hoped that she could make China in this world stronger through her own strength. As for things like air conditioners, she didn't know whether the machinery factory could make them with the current technology even if she drew the structural diagram, but she also wanted to give it a try.

If China now has the ability to independently produce air conditioners, it can not only save foreign exchange in the future, but can even export air conditioners and earn foreign exchange!

Thinking of the beautiful scene of air conditioners being exported overseas, Su Ran's hands moved faster with excitement.

Su Ran spent the entire afternoon drawing the compressor of the outdoor unit of the air conditioner, so seriously and attentively that she didn't notice the time at all. It was only when she heard Zhang Xue and Li Yun saying goodbye outside that she realized it was time to get off work.

Because there was still a lot to draw and she definitely couldn't finish this part within half an hour, Su Ran didn't give herself overtime. She finished the part that was almost finished just now, and then put the things away.

She walked over to the clothes rack, took off her work clothes and put on her heavy coat.

In the late autumn evening, the sky has begun to darken, and the lights of the houses in the distance are gradually lit up. The breeze blows, the leaves rustle, and the coolness penetrates the heart.

He Cheng was waiting for Su Ran at the door. There was a lot of work at the factory today, and his get off work time was delayed for a while. On the way here, he was afraid that Su Ran would wait for him, so he rode much faster than usual. After rushing, he finally arrived.

When he arrived, Zhang Xue just came out. When she saw him, she said that Su Ran was still busy in the laboratory and had not come out in the afternoon. She asked him if he wanted to wait in the room.

He Cheng hadn't heard that Su Ran had anything important to do these days. He guessed that Su Ran wouldn't be able to stay there for long, so he refused. Seeing this, Zhang Xue didn't force it and left first.

He Cheng waited for ten minutes and looked at the door which had been silent. Thinking of what Zhang Xue had just said about Su Ran, He Cheng smiled helplessly. Su Ran, the workaholic, was so serious that she forgot the time again. When he was struggling with whether he should go in and call her, the door opened from the inside.

A tall and slender figure walked out. Although she was wearing thick clothes, she still had an elegant temperament, which made people unconsciously attracted to her.

Su Ran smiled embarrassedly, "Sorry, I kept you waiting again." The girl's eyebrows were curved, making people want to touch her face.

He Cheng raised a smile, "It's okay, come here, let's go home."

Su Ran: "Well! I'll lock the door first."

After locking the door, Su Ran sat directly on the back seat of He Cheng's bicycle.

He Cheng put Su Ran's hand into his shirt pocket. Feeling Su Ran's surprised gaze, he explained, "It's warmer this way."

Su Ran was not surprised, but a little shy. After listening to He Cheng's explanation, she didn't say anything and didn't take her hands out. At this moment, she maintained a posture of hugging He Cheng. Outsiders might think that she was hugging He Cheng's waist.

Feeling the warmth on her face, she thought silently to herself that it was indeed quite warm in here!

Su Ran didn't take her hand back, and this fact made He Cheng curl the corners of his lips. He stepped hard on the pedal with his right foot, and as he pedaled, the bicycle slowly slid forward.

Let's go! Go home!

Ten minutes later, the two arrived at the Jiang family's door.

When they arrived, they happened to meet Grandma Jiang who came out to send her aunt out for a chat. He Cheng, who originally wanted to go back after sending his girlfriend home, was naturally invited to stay for dinner. After all, Grandma Jiang was too enthusiastic and he really couldn't refuse.

After dinner, He Cheng chatted with a few elderly people for a while, and then left. After all, it would be time to go to bed if he stayed any later!

Su Ran walked He Cheng to the door. She smiled and said, "He Zhiqing is really likable. Look how you made my four elderly people smile so hard that they can't stop."

He Cheng muttered quietly: "Do you like that move?"

Su Ran saw him open his mouth, but she couldn't hear what he said, so she asked, "What?"

He Cheng restrained his expression and said, "It's okay!"

Su Ran: "Well, when are you going to rest this weekend? Let's go to the county town together. I'll treat you to a meal. I have to pay off my debt quickly."

Today is Tuesday, and there are still a few days before the weekend. She should be able to finish teaching the earthen kang in these few days. If she works overtime, she may even be able to draw the structure diagram of the air conditioner, and then send it to the county town~

Hearing Su Ran's words, He Cheng remembered the matter of "repaying the debt". It was the last time he waited for Su Ran, and Su Ran felt embarrassed so she owed him the debt.

After thinking for a moment, he said, "I'll take Saturday off."

Su Ran curled the corners of her lips, "What a coincidence, me too, no need to change shifts!"

He Cheng also raised the corners of his lips, "Hmm! What a coincidence." In fact, he calculated that Su Ran would have a day off on Saturday this week, and he should have a day off on Sunday, but he was afraid that after he said it, Su Ran would switch to Sunday. Every time Su Ran switched, he felt very uncomfortable, so this time he took the initiative!

Hehehe, as expected, Comrade Su Ran was fooled by him! He would have to quickly switch shifts with Wang Kaixuan when he returned, so that he would not be considered to have lied to Su Ran.

Su Ran smiled and said, "It's a rare opportunity for a rich woman to take the initiative to treat you to a meal. You must cherish this opportunity and think about what you want to eat in advance! You have three days to think about what to eat for the weekend!"

Seeing her arrogant and cute look, He Cheng couldn't help but smile. He said lovingly, "Okay! I'll think about it when I get back! I will definitely cherish this opportunity!"

Su Ran: "Ok ok, by the way, here's the flashlight, be careful on the road."

He Cheng took the flashlight from her hand and said, "Thank you for the flashlight, my girlfriend. I'm leaving now."

Su Ran: "Yeah! See you tomorrow."

"See you tomorrow."