"Mr. Wang, you're awake. Please have some water."

Xu Yun looked at him somewhat strangely and asked:

"Brother Yongzhu, what is this..."

"No, no, no, calling me that will humble me. Just call me Pillar."

Hearing the three words "Brother Yongzhu," Yongzhu shivered instantly and quickly said:

"Mr. Wang, you might not know.

The master issued an order yesterday to remove you from the servitude register and add you to the guest roster in the mansion.

Now you are considered a guest, different from us servants, so feel free to order me if you need anything."

"A guest?"

Upon hearing this, Xu Yun was taken aback, then understood.

A guest.

Also known as a diner, is a unique group in ancient times.

Most of them were Jianghu wanderers or strategists, without official positions, and some were even fugitives.

They were usually provided for by the master and would assist the master when necessary.

Back in the day, Lord Meng Chang was said to have three thousand diners, and in Water Margin, Chai Jin's manor also hosted a large number of guests.

In essence, guests belong to the 'honored,' which is much higher than 'servants.'

For example, Zheng Kuan, one of the four giants at Old Su's mansion, the hospital guard leader, is a kind of 'honored.'

Therefore, his salary and status are much higher than even the highest class 'Yi' servants.

However, they have a lesser degree of intimacy with the master compared to Elder Xie and Yue Lian, each with its strengths and weaknesses.

If Xu Yun remembers correctly,

Old Su had also recruited dozens of guests before his retirement, and according to records, some parts of the Water Transporting Celestial Observation Platform were completed by guests.

But now that Old Su is retired, the number of guests remaining in the mansion is probably not many.

The empty East Wing also supports this, as that is the guest room, theoretically where guests should be accommodated.

So, aside from the essential hospital guard position, there might only be one or two guests left for accounting purposes.

In all, the number is likely less than three.

Truly as rare as a unicorn's horn.

To be honest.

Whether as honored or servant.

Xu Yun, coming from later times, does not have high expectations for status, so he naturally wouldn't boss others around.

He first had Yongzhu bring the water into the room, took a towel to wash his face, and then said to Yongzhu:

"Brother Yongzhu... hey, don't rush, Brother Yongzhu, let me talk first.

Back then, you were the one who pulled me out of the well with a rope, so there's no need for formalities and ranks between us.

How about this, if you think well of me, I'll still call you Brother Yongzhu.

As for me... you can call me Brother Wang, just like you call the Third Brother, how about it?"

In the Song Dynasty, 'brother' was not used to refer to an elder brother; it was more of a somewhat intimate commoner term.

To illustrate with Water Margin again:

In the segment where Wu Song angrily kills Pan Jinlian, the young boy selling pears in Yanggu County was called Yun Ge'Er, a minor character with a bit of involvement.

Seeing Xu Yun's words seemingly genuine and recalling their shared experience at the Sour Plum Shop, Yongzhu felt a bit of camaraderie with Xu Yun.

So he hesitated for a moment but eventually ventured to say:

"Then I will call you... Brother Wang?"

Xu Yun laughed heartily:

"Sure!"

After finishing his washing, he went to the breakfast stall to have a simple breakfast.

Then he headed to the East Wing and met Old Su and the three, Wang Bing and Wang Yue.

As expected.

After some back and forth, he finally persuaded Old Su and Wang Bing to change his address from 'Mr. Wang' to 'Xiaowang.'

As for Xu Yun's address for Old Su, it remained as 'master,' since guests are also considered subordinates.

Then Old Su told Xu Yun,

that in the middle of the night yesterday he noticed Wang Yue had a slight fever, and since Xu Yun had mentioned that allicin is difficult to store, he used the remaining allicin on Wang Yue.

The illness was stabilized, and it also marked the depletion of the first batch of allicin.

Thus, Xu Yun's goal today was clear:

To complete the mass production of the second batch of allicin and allicin injection solution!

Then Old Su led Xu Yun to another courtyard in the East Wing, where a pile of materials awaited him in the courtyard.

Hmm.

And the donkey.

Upon entering the courtyard,

Old Su pointed to the items and introduced them:

"Xiaowang, here we have natural magnets, iron axes, and wooden molds.

The copper wire was crafted overnight by the craftsmen at the Artifact Bureau. See if it fits your needs.

Also, as you mentioned,

the Sour Plum Shop does have some white crystals for making ice, and some were bought back during the First Year.

Oh, by the way, the water transfer device you mentioned has also been prepared; it's the pile on the left."

Xu Yun nodded slightly, first walking over to inspect the precision and specifications of the copper wire.

Ancient times didn't have insulating varnish for perfect insulation of the wire.

But in special situations, parchment and tung oil can be used as substitutes.

When Faraday first experimented, he used parchment too.

The theoretical limit for homemade generator copper wire is five millimeters, about the width of half a fingernail, the thinner, the better below this value.

The specifications of the copper wire Old Su prepared are roughly around two millimeters, consistent with his earlier accounts, claimed to be crafted overnight by craftsmen from the Artifact Bureau.

In other words,

in this era, outside of the extensive time required for delicate craftsmanship.

The processing precision of rapid mass production through official industrial measures is about two millimeters.

Xu Yun quietly noted this information, then turned to the self-priming pump that had been disassembled beside him.

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