At 3 o 'clock in the morning, the lights in the R&D department were still on. Engineer Lao Wang rubbed his sore eyes. The red light parameters flickering on the screen concealed his guilt towards his father.
Last winter, my father's knee hurt so much that he couldn't get out of bed. Watching the old man's hunched back as he moved against the wall, Old Wang shut himself in the laboratory for three days and three nights. He disassembled twenty old devices and redesigned the light source plates that fit the curvature of his knees, just to make the red light gently wrap around every inch of the painful joint like a mother's hand.
On the day the first batch of red light knee joint treatment devices rolled off the production line, he rushed home with the prototype. When the red light filtered through the fabric and spread a warm halo on the father's knees, the old man took two steps and suddenly turned around, saying, "It's like basking in the sun in the old courtyard." At that moment, Old Wang suddenly understood: what they made was never cold machines.
Xiao Lin from the customer service department always remembers that programmer who lost his hair for ten years. The man wrote in the email: "Every time we video chat, my daughter always asks me why I don't have a full head of hair like my classmate's dad." When he received the red light helmet and persisted in using it for three months, he sent a photo - fine down was sprouting from the sparse top of his head, and in the background, his daughter was reaching out to touch his head and smiling.
The lady who was troubled by discomfort in sensitive areas drew a simple sketch in her thank-you letter: The handheld device looked like a glowing firefly, perched in the palm of her hand. "Finally, I dare to wear a dress," she wrote. "You make me feel that I deserve to be treated well."
From the laboratory to the production line, every piece of equipment bears such an imprint: it is the concern for the hunched figures of parents, the response to the hidden secrets of strangers, and the belief that technology can weave a gentle armor. When the red light flows over the skin of different tones, we know that all those tiny expectations for health have found their home in this beam of light.