Reborn Troops

Zhou Wanwan sat in her jewelry store, staring at the pile of pearls in front of her.

Her fingers slid gently over the smooth beads, as if touching some mysterious treasure.

The store is not big, but every inch of the space is carefully decorated by her. The walls are hung with all kinds of jewelry, from necklaces to earrings, each piece sparkles with a unique light.

"Wanwan, what are you thinking about?" A shallow voice suddenly came from behind, breaking Zhou Wanwan's thoughts.

Zhou Wanwan turned her head and saw Qianqian standing at the door with a cup of coffee in her hand.

Qianqian is her best friend and her most trusted advisor. The two grew up together and can talk about anything.

“I was thinking about that pearl bag,” Zhou Wanwan sighed, “Although it’s small, I think it has great potential.”

Qianqian came over, sat opposite Zhou Wanwan, and took a sip of coffee. "I have an idea," she said, "If this bag can change color, will it be more attractive?"

Zhou Wanwan's eyes lit up, as if a lamp had been lit. "Change color? Do you mean like a chameleon?"

Qianqian nodded, "Yes, for example, it turns golden in the sun and silver under the light. A bag like this will definitely cause a sensation."

Zhou Wanwan fell into deep thought. She knew that this was not just a simple idea, but a challenge.

But she loves challenges, especially ones that can make her store business better.

"Okay, let's try it," Zhou Wanwan finally made up her mind, "but this is not an easy task."

He smiled faintly, "I know, but you have me. Let's figure this out together."

In the next few days, Zhou Wanwan and Qianqian began their experiments. They tried various methods, from changing the surface coating of the pearls to using special dyes, but the results were not satisfactory.

"This is much harder than I thought," Zhou Wanwan complained as she stirred a pot of strange liquid. "I thought I could just add some magic powder and it would be done."

Qianqian stood aside, holding a thick chemistry book in her hand. "Science is not magic, Wanwan. We need to find a material that can react with light."

Zhou Wanwan sighed, "I know, but I really hope we can find it quickly."

Just then, Qianqian suddenly thought of something, "Wait, I remember my dad mentioned a special kind of pigment that can change color with temperature."

Zhou Wanwan's eyes lit up again, "Really? Then let's go find your dad and ask him."

The two hurried to Qianqian's home. Qianqian's father was a retired chemistry professor who was familiar with all kinds of strange chemical reactions.

"What are you doing?" Qianqian's father asked with a smile when he saw how hurried they were.

Qianqian briefly explained their plan. After listening, Qianqian's father nodded and said, "I do know a kind of pigment that can change color with temperature. However, this pigment is very unstable and requires special storage conditions."

Zhou Wanwan and Qianqian looked at each other and saw hope in each other's eyes.

"It doesn't matter, we can do it," Zhou Wanwan said firmly, "As long as we can make that bag, we are willing to accept any conditions."

Qianqian's father smiled and said, "Okay, I'll give you some samples and you can try them yourself. But remember, this is not a joke."

Carrying the samples given by Qianqian's father, Zhou Wanwan and Qianqian returned to the jewelry store.

They began a series of experiments to try to find the best formula and process.

"I think we should first test the adhesion of this pigment to the pearls," Qianqian suggested, "If the adhesion is not good enough, no matter how good the color change effect is, it will be useless."

Zhou Wanwan nodded, "You're right. Let's make a small sample first."

They carefully applied the paint onto several pearls and then placed them in different temperature environments for observation.

The results were disappointing, with poor pigment adhesion and unstable color change.

"What should we do?" Zhou Wanwan was a little frustrated. "We spent so much time, but it still doesn't work."

Qianqian patted her shoulder and said, "Don't be discouraged, Wanwan. Scientific experiments are like this, there will always be failures. Let's try another way."

They tried different formulas and processes, but the results were still unsatisfactory.

Zhou Wanwan began to doubt whether the idea of ​​this color-changing pearl bag was really feasible.

Master Zhongshan is a jewelry design master in his seventies. His studio is located on the other side of the city, away from the hustle and bustle of the city center.

Zhou Wanwan and Qianqian came to Master Zhongshan's studio with their confusion and experimental samples.

Master Zhongshan's studio is full of historical atmosphere. The walls are covered with various ancient jewelry design drawings, and various fine tools and materials are placed on the table.

Master Zhongshan was sitting in front of a large table, holding a magnifying glass in his hand, carefully observing a gem.

"Master, I'm sorry to bother you," Zhou Wanwan said softly, "We have encountered some difficulties and hope to get your guidance."

Master Zhongshan raised his head and looked at them with a smile, "Wanwan, Qianqian, you are here. Sit down and tell me what problems you have encountered."

After Zhou Wanwan and Qianqian sat down, Zhou Wanwan described in detail their ideas and experimental process about the color-changing pearl bag. After listening, Master Zhongshan pondered for a while.

"Your idea is very creative," Master Zhongshan said slowly, "but the stability of the color-changing material is indeed a big problem. Have you considered using photosensitive materials?"

Qianqian shook her head. "We have tried some photosensitive materials, but the results were not satisfactory."

Master Zhongshan nodded and said, "The choice of photosensitive materials is very important. Different photosensitive materials react differently to light. Here are some photosensitive materials that I studied when I was young. You can try them."

As he spoke, Master Zhongshan took out a small box from under the table, which contained some powders of different colors.

He handed them to Zhou Wanwan and Qianqian, "These materials are the result of my many years of research. They are very sensitive to light, but they require precise control conditions."