Lu Qingsheng rushed back to Yukang Prefecture and went directly to the army, while Lu Wanqing returned to the Lu residence.

"Qing'er, where did you and your father go? Why didn't you send anyone to tell me? I've been worried about you at home for the past few days," Madam Jun said, stepping forward to greet him.

Despite her complaints, she habitually tidied Lu Wanqing's clothes and hair.

Lu Wanqing affectionately linked her arm with hers and said with a nonchalant smile, "Oh, Mother, Father and I just heard that my cousin went to Yongshan County, so we went there too..."

When Jun heard the words "Yongshan County," her body stiffened, and a sinister expression flashed across her face. Neither Lu Wanqing nor the people around her noticed her change.

"Oh? What did you do when your father went to Yongshan County with you?" Madam Jun asked, looking very curious.

Lu Wanqing sighed innocently, "We originally planned to visit General Lu first, but as soon as we arrived at the general's mansion, we learned that my cousin had returned to Qinzhou, and my father was in a hurry to come back."

"Why are you thinking of visiting General Lu? Our family doesn't seem to have any dealings with him, does it?" Madam Jun asked, puzzled.

Upon hearing this, Lu Wanqing immediately perked up. "Originally, it was because I had some connection with Madam Lu, and my cousin was also close to them, that I thought I might be able to find my cousin at the General's Mansion. But my father wanted to go for other reasons."

"Oh? What happened to your father?" Madam Jun tightened her grip on the handkerchief, her heart pounding in her chest.

Lu Wanqing didn't keep them in suspense and said directly, "Because I met General Lu last time, and he looks so much like my deceased mother..."

Junshi had no interest in listening to what she said after that; only one sentence flashed through her mind: That child from back then really didn't die!

That bitch! She actually left her with a future problem and tricked her!

"Did your father see General Lu?" Madam Jun's face was a little stiff, but she still forced a smile and asked.

Lu Wanqing shook her head. "No, the General left with my cousin." She then sighed, "I wonder where my cousin is now?"

Jun gave her a few perfunctory words, and then said, "You must be tired after traveling for several days. Go back to your own courtyard and rest!"

Lu Wanqing smiled and waved to her, "Then I'm going back, Mother."

"Go on, go on. You don't need to come to pay your respects tomorrow morning. Sleep in a little longer." Madam Jun waved her hand.

Lu Wanqing left with a smile, completely unaware of Jun Shi's unusual behavior.

Lady Jun hurried back to the main courtyard. As soon as she entered the room, she dismissed all the people around her, leaving only her wet nurse.

"Mother Huang, do you think my husband has discovered something?" Madam Jun asked, clutching her handkerchief tightly and biting her lip.

Madam Huang quickly comforted her, "Madam, please don't scare yourself. The things you did back then were done so secretly that even when the former madam was alive, no one noticed anything was wrong. Now that you're dead and there's no way to verify it, you should keep that matter to yourself."

"But if that child is still alive, and my husband finds out..." Madam Jun felt uneasy, and a crazy obsession was secretly surging in her eyes.

Madam Huang patted her hand and said, "Madam, you can rest assured. There are so many people in this world who look alike. It's impossible for you to believe that the general is his son just because of his appearance."

After thinking carefully for a long time, Jun nodded and said, "You're right. I can't panic. Only you and I know what happened back then. Everyone else who knew about it is dead. As long as we don't say anything, no one will know."

Back then, she had Huang Mama find someone to follow Madam Lu, who was six months pregnant at the time, and tamper with her carriage, causing her to have an accident when passing through Yongshan County and give birth to a child prematurely.

However, when Madam Lu returned, she told everyone that the child had died and that they had buried him locally according to custom. Lu Qingsheng had also visited the child's grave at that time.

Soon after, Madam Lu gave birth to Lu Wanqing. After giving birth to Lu Wanqing, Madam Lu's health deteriorated, and she passed away after struggling for five years.

During those five years, because of her illness, the Lu family never went to Yongshan County again. Later, after Madam Lu passed away, Lu Qingsheng remarried her. In addition, with various miscellaneous matters piling up in the household, Lu Qingsheng gradually forgot about the dead child.

She had never heard him mention it again over the years, and Madam Jun thought he had forgotten about it. But today she realized that Lu Qingsheng still cared about that child. Otherwise, he wouldn't have gone to see General Lu just because Lu Wanqing said that the child looked like him.

"It's good that Madam has figured it out. Let's just pretend we don't know anything about this and continue living our lives as usual," said Madam Huang, going along with her words.

She did more than just this one thing for the Jun family back then. She didn't feel there was anything to be afraid of. As long as she didn't say anything, who would know?

Madam Jun nodded. "What Madam Huang said is true. I was overthinking it just now. When the adults come back, we won't mention this matter again."

If no one mentions it, you'll naturally forget about it over time.

...

Over the past few days, Jiang Qinyu has gradually made Doctor Mo and his apprentice understand the importance of disinfection, and also made them realize that the production of syringes is a delicate task that cannot be taken lightly.

"So making this requires so many steps?" Doctor Mo looked gloomy. "Then if we want to promote the smallpox vaccine throughout Da Yue, won't it take a very long time?"

Jiang Qinyu showed him the facts: everyone's blood is different, and if a syringe is used on multiple people, it could lead to the spread of other diseases. Therefore, his previous idea was no longer applicable.

Jiang Qinyu shook her head, "Not entirely. As long as we find a way to increase production, the promotion of the vaccine will not be greatly hindered."

Moreover, once this mass production model spreads, it will completely change Dai Viet's production model and drive the development of the entire manufacturing industry.

In the long run, the production of syringes is likely to change the economic situation in Dai Viet.

Thinking about this, Jiang Qinyu felt that she needed to be more cautious about launching a mass production line. It wasn't that she was afraid of trouble, but she had to consider whether she could control the chain reaction that such a thing might cause.

To give a simple example, if a commoner could earn one or two taels of silver a month working in a workshop, enough to support a family of five, and there were a total of twenty such workers in the workshop.

With the advent of mass production mindset and tools, this workshop might only need five, or even fewer, workers.

How will those unemployed workers support their families?

If society as a whole cannot absorb a large number of unemployed workers, who will maintain social stability?

In short, anything can have a butterfly effect, especially things that change the course of history. Even small things can become the fuse that ignites earth-shattering events.

"Increase production? Does that mean hiring more people?" Doctor Mo frowned. "How many people would that require?"