The abandoned concubine who transmigrated woke up shouting "Long live the widow!"

Everyone, young and old, enjoyed the meal. The second princess ate the most, which made her wet nurse very nervous, afraid that she would overeat.

When Jingxue saw this, she took out some digestive tablets and gave them to the children.

Seeing that the three children were doing well in Yue'an Palace, Jingxue was relieved. She first sent the Empress Dowager back to Shou Kang Palace, and then they returned to the East Palace.

Jingxue stayed in her room all afternoon and instructed that anyone who came should be reported first.

She entered the space to see what new building materials were available in the mall. She had gone to sleep after returning from the Cold Palace last night and hadn't had time to look at them.

What made Jingxue happiest was that they now had glass. This would bring her a lot of profit.

That evening, Ye Muchen brought back another message: the princess who was to be exchanged for hostages in Cangbei would be received by Princess Jingyi. In fact, the original choice for this person was the Grand Princess Ye Muyan.

However, Ye Muyan was too gentle and lacked assertiveness. After discussion by the Ministry of Rites, it was decided that Princess Jingyi would receive her, mostly because Princess Jingyi knew martial arts.

Jingxue wasn't too concerned about this matter; she was thinking about the tap water issue. With the building materials, drilling a hand pump well wouldn't be a problem.

In the afternoon, she had already made a simple model of a water pump using two syringes, one large and one small.

Even with this hand pump well, tap water still couldn't be provided because there was no electricity and groundwater couldn't be pumped up; the only option was to manually pump water.

She started thinking about making a human-powered water pump.

During dinner, Ye Muchen noticed Jingxue's frequent absent-mindedness but didn't say anything.

After the meal, when only he and Jingxue were in the main hall, Ye Muchen asked, "Xue'er, is something on your mind?"

"Ah? Oh, I'm not worried about anything." Jingxue shook her head.

"Then you..." Ye Muchen didn't know how to ask, and he was afraid that Jingxue would get angry.

Seeing Ye Muchen like this, Jingxue knew he was probably worried about her. "Well, don't overthink it. I was thinking about something else. Oh, by the way, I have something to show you."

Ye Muchen watched as Jing Xue rushed into the bedroom like a whirlwind, and came out a moment later with something in her hand.

"Miss, what is this?" Before Ye Muchen could answer, Runyue, who was carrying in the digestive tea, asked.

“This is a model of a hand pump well!” Jingxue said with a smile.

"Is this also a kind of well?" Upon hearing the model, Ye Muchen recalled how they used clods of earth to represent hills during battles, and the two should have a similar meaning.

Jingxue nodded, "Look!" After saying that, Jingxue started operating it. She pressed the small handle of the model up and down, and water was sucked out from the box below and flowed into the small bucket that Jingxue had made.

The intercalary month, anxious to stop, said, "Miss, let me play for a bit."

"Here, take it and play with it over there, but don't spill the water!"

"Xue'er, what should we use to make this replica of the well? Is it easy to make?" Ye Muchen asked.

Jingxue watched as Runyue played with a model on the table next to her and began to explain it to Ye Muchen.

"This hand pump well doesn't use a lot of materials. It mainly consists of a well head, well pipe, pressure rod, and water outlet. The well head is the water outlet, which is wider at the back and narrower at the front. The tail is the pressure handle connected to the well core, which is about 20 to 30 centimeters long. In the center of the well is a water-drawing sheet. It is the force of this water-drawing sheet and the well core that draws the groundwater up."

Ye Muchen listened attentively and took careful notes.

"When you start this hand pump, you need to fill the well pipe with water first to remove air and create a sealed environment. Then you can pump water up and down by pressing the handle," Jingxue said.

Ye Muchen said, "This well is better than that windlass well, and it's safer too!"

"Yes! Windlass wells are relatively shallow, but this one can be dug deeper. Surface water contains more impurities, so a deep well is better for drinking water, but it doesn't matter if it's for irrigation!"

"Xue'er, you are truly a clever woman!" Ye Muchen exclaimed sincerely.

Jingxue: I've benefited from the wisdom of our ancestors for free.

“Let your army handle the technology for this hand pump well in the future! It will be convenient for your own use, and you can also earn some hard-earned money. After the delegation leaves, we’ll select a few people to learn it!” Jingxue said.

Ye Muchen immediately said sincerely, "Xue'er, I thank you on behalf of the soldiers!"

"Oh! You're welcome!" Jingxue thought to herself, "I still need to make a little money off you for some of these materials!"

"We're leaving before dawn tomorrow, so you should take a bath and get some rest!" Ye Muchen said, standing up.

"Okay! See you tomorrow morning." Jingxue watched Ye Muchen return to his room.

"Stop playing around, Leap Month, put it away and go check if your Little Man sister has boiled the water yet."

"No rush, Brother Gao and the others are helping the prince boil water too!"

"Are you coming out of the city with me again tomorrow?" Jingxue asked.

"Miss, I want to! Please take me with you!" Runyue finally put down the pump well model.

"Then why don't you go and ask your sister Liqiu to prepare clothes for you to wear tomorrow? Make sure they're thick!" Jingxue said with a smile.

"Okay!" Runyue carefully carried the model out as well.

This was the last night he would stay at the East Palace. Ye Muchen lay in bed, tossing and turning, unable to fall asleep.

He felt there were so many things he didn't know about Jingxue.

He was no longer curious about Jingxue's kung fu, but what truly puzzled him was that Jingxue would always come up with some strange and unheard-of gadgets from time to time.

These things are not only novel and unique, but also often have unexpected uses and effects.

Although he had been fighting on the battlefield for many years, he was still a prince of the imperial family, and the best things in Beiye were always reserved for the imperial palace first.

But the things that Jingxue brought out were so impressive that even Qin Jing, who had traveled all over the country and was very knowledgeable, was impressed, let alone others.

Ye Muchen guessed that Jingxue had instructed Qin Jing and her servants, and even the children were used to it and no one asked, so he should not pry.

He then thought of Qin Jing's words about friends with food. Besides Jing Xue, who else could it be?

Ye Muchen felt that he was so close to Jingxue yet so far away. As he thought about this, he slowly fell asleep.

The next morning, the night was still as dark as ink, and there was not yet a hint of dawn on the horizon.

Ye Muchen had already risen and, according to the time stipulated by the Ministry of Rites—Mao Shi (5-7 AM)—arrived precisely at the palace gates with Jingxue, Runyue, and Gao Chi. At that moment, some officials from the Ministry of Rites and Prince Duan had also just arrived. Several soldiers quickly stepped forward and handed over the horses that had been prepared beforehand to Ye Muchen and his party.

Jingxue and Runyue rode together on the same chestnut horse they had ridden together last time.

Last night, Jingxue altered the down jacket she had worn last time for Runyue, and put it on the little girl this morning. The little girl will be staying with her all the time during this period, and she is afraid that the child will get cold.