Twenty years of cold chain

"Shutong! Dawn has succeeded!"

Luan Pingxin's tone was filled with an excitement that Hu Shutong had never heard before, and there was even a slight tremor in it.

Upon hearing these five words, not only Luan Pingxin, but even Hu Shutong's cheeks went numb!

Don't underestimate these five simple words; behind them lies endless darkness and the perseverance to overcome adversity.

"Dawn" is a screw refrigeration compressor. Our country jointly designed and produced the first oil-injected screw refrigeration compressor in 1976, but there is a huge gap compared with foreign countries. It has been improving for more than 20 years.

Compared to the oldest type of reciprocating refrigeration compressor, screw compressors have a simpler structure, fewer vulnerable parts, higher volumetric efficiency, lower exhaust temperature, and can achieve stepless adjustment of cooling capacity.

In recent years, foreign brands have successively built factories in China, using the labor force of Chinese people to control and dominate the compressor market, firmly grasp core technologies, and create a situation where more than a dozen major foreign brands are competing.

And Dawn is our national brand!

This marks the beginning of the competitiveness of domestically produced compressors. No matter how fierce the competition becomes in the future, we will have a place!

While not yet perfect, Dawn has significantly improved upon its predecessor. Dawn utilizes a new tooth profile, increasing efficiency by 10% compared to the standard profile; its new oil separator achieves an oil separation efficiency of 99.998%, comparable to top-tier international products; and regarding internal volume ratio, Dawn has moved beyond the three selectable valve types, developing a manually adjustable internal volume ratio device.

For more practical control functions, an intelligent microcomputer control system is used to adjust the cooling capacity, avoiding excessive manual intervention and achieving mechatronics integration.

What is even more admirable is its creation process. These complex techniques are indispensable, but if even one of them fails to take shape, dawn will still be eternal night.

This is precisely Luan Pingxin's predicament. She and her team work hard every day, immersing themselves in the laboratory, but she often cannot see the dawn and cannot predict when that day will come. Such perseverance is not easy.

To give a very simple example, why do people like to eat sunflower seeds? Because each seed provides a satisfying taste sensation, which motivates them to eat the next one. But many people on the front lines of scientific research may never receive the motivation of fruitful results, even in their entire lives, yet they still continue their work.

"Shutong, I really want to see you right now."

Luan Pingxin choked up a little, and Hu Shutong's eyes also welled up with tears. Although they were thousands of miles apart, Luan Pingxin's voice and appearance seemed to be right in front of them. This strong-willed and stubborn girl returned to her little corner to talk to herself on the phone, crying and laughing without any pretense.

This is a memorable moment in Luan Pingxin's life. From her internship to now, after four years of hard work, she has finally honed this skill.

As dawn broke, Hu Shutong's reluctance intensified. Unlike himself, Luan Pingxin was not someone who could get feedback on a plan as soon as it was completed, or be relieved of a burden once a task was finished. During these long days, he suffered in silence, unable to express his inner torment.

Just then, Hu Shutong suddenly heard the music box playing a clear, melodious blue Danube tune. Instantly, Hu Shutong's heart drifted far away. He tucked his phone under his shoulder and began to pack it up.

All those plans and solutions are now out of the question; none of those problems can compare to what's right in front of us.

"I'm sorry, Pingxin, I've been too busy lately. I'll definitely come to see you as soon as things calm down a bit."

"It's not surprising at all, which is why I asked you to send me this."

"I'll hang up now, I'll call you tomorrow morning."

"Dawn will start mass production at the end of this month. The testing process was exhausting. Go ahead and do your work, I need to take a good rest."

"I need to get up early tomorrow; once I start being lazy, I can't stop."

"You're going to be lazy for a few days! I'm hanging up!"

Luan Pingxin lives in an old-style building not far from the group. Four five-story buildings surround a small square in the middle. The flower beds are full of charming lilacs, and underfoot are stone slabs that have been stepped on for many years and are still firm.

When the phone rang, Luan Pingxin went to the balcony. Her eyes widened at first, and then she pursed her lips with a sweet smile.

He saw Hu Shutong standing by the flower bed, as if a night breeze, following his wishes, had blown him to his side. Without bothering to wash or dress, she ran downstairs.

This was a scene that Hu Shutong would never forget. When Luan Pingxin came to him like a princess who had run out of a garden, she deliberately tilted her head, her reproach and secret joy concealing an indescribable sense of contentment.

"Who said they were busy?"

"I was busy trying to buy train tickets."

Luan Pingxin glanced sideways, her eyes sparkling. "To show my gratitude, I'll go to the trouble of making you breakfast."

"A journey of a thousand miles, one meal isn't enough."

Their eyes met. Luan Pingxin looked up, while Hu Shutong remained focused, as if time itself had frozen for a moment.

After embracing, the two linked arms and went upstairs.

Stepping into the room, I saw a table piled high with documents and materials, so numerous that they were impossible to organize without knowing where to look. It was exactly like the scene in my own dormitory.

Luan Pingxin didn't care about any of that, and soon she heard sizzling sounds from the kitchen.

While others display their trophies and certificates in a prominent place, Luan Pingxin's are displayed like a bunch of dwarfs next to the television. There are no decorative paintings on the walls, only equipment diagrams.

"Hu, stop daydreaming! Tidy up the table and get ready to eat!"

Not daring to touch anything on the table, Hu Shutong carefully rearranged the various materials. However, one poster-like document caught his eye.

"Madrid Refrigeration Exhibition".

……

I've loved cold chain logistics for twenty years.