However, after his surprise, he was filled with pride and self-esteem.
Now, looking at Jiang Mianmian explaining the lithium battery, he had an immense sense of pride as if his own little sister had grown up and achieved something great.
After all, improving the capacity of nickel-hydrogen batteries and manufacturing lithium batteries, which were only available abroad, were two different concepts, not to mention rechargeable lithium batteries.
"Yes, I’ve been working on lithium batteries this time. Hydrogen batteries have a short lifespan and are heavy, making them inconvenient to carry. Although lithium batteries are a bit more expensive than nickel-hydrogen ones, they have a longer cycle life, so overall, they are still very cost-effective," Jiang Mianmian elaborated on her initial thoughts when creating the lithium battery.
She spoke for a long time and realized that the car had stopped. They were all staring at her intently, not saying a word for a long while. She touched her face, asking with some confusion, "What’s wrong? Is there something on my face, or did I say something incorrect?"
Yu Cheng, having witnessed Jiang Mianmian’s process of making a color television, was initially surprised by the lithium battery, but he quickly regained his composure.
Tang Lin was the second to react, and he asked with a serious face, "Mianmian, did you make this rechargeable lithium battery on your own?"
"Yes, Brother Tang Lin, I looked up the relevant information and spent an entire semester making it," Jiang Mianmian replied truthfully.
"Mianmian, this lithium battery you’ve created is extremely important to our country. Let’s not eat now; we should go back and talk to Grandpa Yu about this, okay?" Tang Lin said with a serious expression.
The other three boys had no objections since they all came from extraordinary homes, and their elders often discussed matters at the national level.
Having been influenced by such conversations, they naturally understood the extraordinary significance of the rechargeable lithium battery Jiang Mianmian had created.
"Okay, sure," Jiang Mianmian readily agreed, noticing that their expressions had changed.
"Xu Sheng, back to the compound," Tang Lin said, patting the driver’s seat.
"Got it," Xu Sheng started the car, made a U-turn at the next intersection, and drove directly towards the military compound.
Jiang Mianmian, aware that Hua Country did not possess lithium battery technology, had planned to discuss it with Grandpa Yu that evening.
She intended to pass the technology on to the country through Grandpa Yu, but she didn’t expect such a strong reaction from Brother Tang Lin and the others, to the point of skipping their meal and heading straight back to the compound.
At that moment, Jiang Mianmian realized she had perhaps underestimated the complexity of lithium battery technology.
Seeing the level of their concern, this technology must be as important as the color television.
The car quickly arrived back at the military compound, and Xu Sheng parked in front of the Yu Family’s home. Yu Cheng, carrying Jiang Mianmian’s backpack, stepped out of the car with her.
"Tang Lin, Cheng An, Xu Sheng, for Mianmian’s safety, today’s matter must be kept secret," Yu Cheng instructed.
Although he knew that his brothers would understand the importance even if he didn’t say so, he was still not at ease when it concerned Jiang Mianmian’s safety and made a point to emphasize it.
"Got it, Boss Yu, you can count on me, my lips are sealed," Cheng An assured with a big grin.
"Don’t worry, Yu Cheng, we know how to handle this," Tang Lin said, patting Yu Cheng’s shoulder.
Xu Sheng also nodded from inside the car, "Understood, go on in."
Elder Yu happened to be resting at home today and hadn’t gone to work.