Although not long ago, Xu Yun had already managed to control Wang Yue's injury through external application, this was just a temporary measure.

If we must put it that way.

This was merely using the special effects of garlic extract in combination with Wang Yue, whose resistance to medication was practically zero, to achieve a high-efficiency but short-term effect.

In other words, the proverbial 'hanging by a thread'.

The first batch of garlic juice prepared by Xu Yun had already run out, so intravenous injection became the urgent task.

However, considering that the red sea urchin used to make needles wasn't a common ingredient—or rather, a medicine of this era—it required a trip to the major pharmacies and markets in Bianjing City to find it, so it was unlikely to find the actual item today.

Therefore, Xu Yun could only prepare some garlic extract solution and continued to prolong Wang Yue's life through external application.

After doing all this, taking advantage of the time, he started tinkering with the needle's plating.

Which was...

Silver.

Actually.

Initially, Xu Yun planned to use aluminum for the needle plating.

But according to the normal historical timeline, aluminum wouldn't be officially produced until 1827, and before that metal aluminum was quite rare.

It wasn't that Xu Yun couldn't continue doing it manually, but rather that the process of making metal aluminum was very tedious, even more complex than combining a microscope and generator.

Clearly, Wang Yue's condition couldn't be delayed for that long, so Xu Yun ultimately decided to use silver to prepare the plating solution.

As long as the plating solution ensured that the top part of the sea urchin's spine wasn't broken by the elasticity when pierced into the skin.

Even if some silver did enter the body through an opening, such a dose wouldn't pose any threat to the human body at all.

At most, it would cause some protein denaturation around the wound, making the scab appear darker.

The melting point of silver is 961 degrees, which is a temperature range that can be easily achieved even in ancient times, so the preparation isn't difficult.

Therefore, Xu Yun didn't show off much, he just made a simple small furnace that looked like a coal kiln out of clay, using pressure to increase the melting efficiency, ensuring the silver block could turn into a liquid as soon as possible.

As for the silver used for the plating solution...

Of course, it was drawn from Old Su.

Having prepared these.

Xu Yun left the site in the care of a servant and went to move house himself.

That's right.

Move house.

Mentioned earlier.

Xu Yun has now been registered in the guest roster, completely left the status of a slave, and became a standard 'guest'.

Therefore, his residence naturally changed from the South Wing to the East Wing, which can be considered an ancient version of a promotion and raise.

Compared to the simple South Wing, the East Wing's room was much better.

For example, the room Xu Yun was assigned to was about twenty meters away from the courtyard where Wang Yue stayed, a small independent courtyard.

Not to mention, the courtyard alone spanned about thirty square meters.

In the center of the courtyard was a large willow tree, providing an extremely refreshing shade.

To the left of the willow tree was a small pond about ten feet square, with a few fish swimming leisurely inside.

To the right of the willow tree was a grape trellis, with a recliner underneath—the kind known as a old-fashioned chair these days.

When the sun sets, you can have the servant cut a few pieces of fruit and brew a pot of scented tea.

Leaning leisurely on the chair while watching the night view is quite delightful.

Beyond this.

The decorations inside this room were also much better than those in the South Wing's room.

For instance, there was a writing desk, inkstone, and incense burners inside, and even the bedside was adorned with various intricate carvings.

On this particular day.

Xu Yun not only created a generator by hand but also tinkered with electrolysis, using the corrosiveness of hydrochloric acid to open Old Su's eyes to the microscopic world.

His physical strength was still manageable, but the exhaustion of his energy was considerable.

And by the time he finished moving, it was already the hour of Xu, which is after eight o'clock in modern time.

So after having a simple dinner, Xu Yun lay down on the bed and fell into a deep sleep.

It was another silent night.

.......

Perhaps it was because of the good bed, but Xu Yun had a solid sleep and was awoken naturally the next day.

That's right, today no one called him to get up.

"Ha....."

At around seven or eight in the morning.

Xu Yun stretched lazily and woke up leisurely.

Then he got up, and put on new clothes—the clothes that Old Su had ordered people to tailor for him yesterday, a low-key and common gray color style.

However, the fabric was countless times better than his previous blue attire.

After dressing.

Xu Yun walked to the sink by the door and turned a switch similar to a faucet.

In less than a moment.

Rushing sound——

A stream of cool well water gushed out, gradually filling the basin.

Xu Yun washed his face with this water, opened the door, intending to find Old Su.

He had only taken a few steps.

When a somewhat timid and familiar voice reached his ears:

"Brother Wang..."

Xu Yun looked in the direction and saw another familiar face standing outside his door:

"Oh, it's Third Brother?"

Indeed.

The visitor was Zhang San.

From the title this little boy used, it wasn't hard to guess that Yongzhu had likely explained a few things to him.

Then Xu Yun quickened his pace and went to Zhang San's side, unabashedly patting his somewhat dusty shoulder:

"Third Brother, where have you been running off to these days? I haven't seen you around."

Seeing Xu Yun treating him the same as before, Zhang San's expression gradually relaxed.

Of course.

He was still a bit reserved, but not to the absurd extent of a pathetic barrier:

"My sister's child reached the full month yesterday, so I went to help my brother-in-law's family prepare some matters, hence I took a few days off...

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