The apartment Xu Yun rented is in a rather remote community outside Ke Da, a secluded area with a serene environment.

Moreover, considering the context of Halo Space, he rented a two-bedroom apartment with a living room.

Thus, although Old Su's appearance is somewhat abrupt, it will still take a relatively long time to adapt to life in the 21st century.

But at least in terms of accommodation, it is very easily arranged.

Then, Xu Yun used the local shopping function on the online platform to find a furniture store and ordered a walnut bed.

The bed's dimensions are 1.8 meters, costing four hundred dollars, including delivery, to be delivered within an hour and a half.

While waiting for the wooden bed to be delivered,

Xu Yun began introducing Old Su to the various functionalities of the furniture.

He first walked over to the switch, pointing to the energy-saving lamp on the ceiling, and said:

"The lighting facility above us is called an electric lamp; this is the switch, connected to the circuit behind."

"Just press the switch, and you can control the electric lamp to turn on or off, like this."

Saying this, he pressed the switch with a click.

The bulb went out, and the brightness inside the room decreased significantly.

Then he pressed the top again, and the energy-saving lamp lit up once more.

"Truly a clever tool..."

Old Su looked at the bright energy-saving lamp, a trace of amazement flashing in his eyes:

"Electric lamps... These are much brighter than oil lamps."

After speaking, he walked over to the switch with interest, gingerly touching it with his hand:

"Xiaowang... oh no, Xiaoxu, is the circuitry behind this object based on the same principle as the generator you originally created?"

Xu Yun pondered for a moment and said:

"The nature of the current is the same in both, both are alternating current, not direct current."

"However, modern circuit principles are relatively more complex, as the level of industry differs."

Old Su nodded thoughtfully.

Back when Xu Yun was working on telescopes and engines in the Song Dynasty, he often mentioned the words 'industrial level' to Old Su.

At that time, Old Su was somewhat puzzled:

Despite gathering the talents and equipment of the entire Song Dynasty, why did it still not meet Xu Yun's requirements?

But now, having come to the future himself, and seeing these simple yet technologically rich devices, he suddenly understood Xu Yun's meaning.

It turns out that what Xu Yun meant by the low industrial level of Great Song was in comparison to nine hundred years later!

It's like returning to a remote village after being accustomed to skyscrapers, it's only natural to feel unsatisfied.

Unfortunately, during Old Su's time, Cao Xueqin hadn't been born yet, otherwise he would likely have shared feelings with Granny Liu.

Then he turned his head again, pointing at the phone in Xu Yun's hand and asked:

"Xiaoxu, what is this?"

"Oh, you mean this."

Xu Yun tossed his Huawei nova6 a bit and said:

"This is called a mobile phone, a very popular yet sophisticated instrument of our time. You might not be able to fully understand its principles, as it involves electronic components and even more profound knowledge."

"As for its main function... in ancient terms, it is like transmitting sound over a thousand miles."

"Transmitting sound over a thousand miles?"

Xu Yun nodded with a smile, feeling inexplicably delighted introducing modern devices to someone from the past:

"That's right, just like what you saw earlier, I can communicate in real-time with someone miles away using it."

"Do you see this search bar?"

"Just input what you want to find, and you can search for a whole lot of desired results."

"And this is WeChat... Penguin..."

"This is the camera... Stand still, I'll take your picture!"

Click—

A moment later.

Looking at the screen, the expression was stiff, yet the face was identical to when he was young. A trace of shock flashed across Old Su's eyes again.

"Truly a divine artifact..."

He then noted down the mentioned icons one by one, pointing at a column and asking:

"By the way, what is this called Madu?"

"...just a learning tool."

Xu Yun calmly hid the icon and said with a composed expression:

"I'll get you a mobile phone when there's a chance. However, you'll have to find time to get a SIM card with me."

"Oh, and a bank card— it's like the drafts used in Song Dynasty banks, allowing you to withdraw money..."

After that, he took Old Su to the bathroom, introducing the use of the showerhead and toilet while fully clothed.

A few minutes later.

The two returned to Xu Yun's bedroom, and Xu Yun said:

"In short, you can stay here for now, and I'll take you out in a couple of days."

"Anyway, your documents and procedures are all in order, so you can take planes and high-speed trains."

"I'll also take you to Five States Mountain someday, your tomb is built there, and you can offer some paper money to yourself."

"To be frank, the difference between the 21st century and the Northern Song isn't just what's inside this room, you have much to learn."

Old Su agreed with a nod again after hearing this.

This room's area is smaller than his bedroom in the Su Mansion, yet it's filled with astonishing and mouth-gaping magical technology, truly a new world entirely.

Not to mention anything else.

Take that toilet in the bathroom, for instance:

When he first saw the toilet, he thought it was a water well from later generations, and he could just scoop water with the cup from the side.

Who would have thought.

This thing that appears 'exceedingly luxurious' turns out to be a receptacle for unclean matters used in dressing?

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