After the words were spoken, time seemed to freeze, and the surroundings fell into silence.

Only the surging waves outside the car continued to roll and roar. Large raindrops pounded violently against the car windows and body, making a continuous, pattering sound.

!? Nothing has changed... Xi Xi's heart was gradually filled with a trace of doubt.

She put her hands behind her back and gently tapped the inner wall with her fist, listening carefully to the echo.

There was a change! The echo was crisp and loud, noticeably crisper than before. This change startled Xi Xi, because usually, only when an object becomes thick and solid would it produce such a soft, resonant echo.

This quality was clearly a level above, and Xi Xi's mood instantly became excited. She couldn't wait to stand up and hurried downstairs to the first floor.

She casually placed her hand on the wall around the stairs and felt a warm breath rush towards her.

After a brief hesitation, Xi Xi quickened her pace downstairs.

Upon arriving on the first floor, she indeed noticed a significant increase in temperature; the previously chilly air now felt warmer.

Xi Xi stretched out her fingertips and carefully touched the inner wall of the carriage again. This time, she clearly felt the warmth—it didn't come from the sunlight or the fire outside, but from the inner wall itself.

This warmth is very gentle, like a hot drink on a winter's day, bringing an indescribable sense of comfort from the bottom of one's heart.

Could it be that the reinforcement is not limited to strengthening, but also includes enhancing the heating layer?

This is a classic case of robbing Peter to pay Paul, but it's totally worth it! Absolutely worth it!

Xi Xi pondered various possibilities in her mind, her eyes fixed on the remaining time displayed in the upper right corner of the vehicle's custom rune screen. She had no time to feel smug and rushed towards the second floor as fast as she could.

Without hesitation, she reached out and pressed the button for the elevator leading to the third-floor courtyard.

In fact, the upgraded RV largely retains the unique color scheme of her original car in terms of both exterior and interior design. Therefore, Xi Xi doesn't plan to make too many changes to the interior color scheme.

However, the only drawback is that the newly added courtyard uses an antique mahogany color scheme.

It's not that the mahogany color itself isn't beautiful, but it contrasts sharply with the soft and elegant Morandi gray tones of the car as a whole, making it seem out of place and unusually jarring.

Xi Xi had long disliked the mahogany color, so she decided to change it! Since she had already used up the golden talisman, she might as well make the most of it!

With only 3 seconds left in the countdown, Xi Xi finally completed the color mixing. Looking at the newly transformed and harmonious courtyard environment, she breathed a long sigh of relief and then began to carefully examine her surroundings.

The surrounding frame light has turned into light particles and dissipated, and the perspective function has also disappeared.

Xi Xi probed the brand-new bay window in the courtyard, tapping it repeatedly. She found that neither its hardness nor its material had changed substantially, and the surface of the bay window did not have the pungent smell that one would expect after fresh paint.

Even more surprisingly, she keenly noticed that the walls here also had an automatic heating function, and the heating level was much higher than that of the first floor!

Xi Xi even felt that it was a little too hot to handle, to the point that she needed to put a thin mat under her hand.

With a hint of curiosity in her mind, Xi Xi climbed the spiral staircase back to the second floor. When she reached out and touched the wall on the second floor again, her brows furrowed slightly...

Compared to the first and third floors, the interior walls on the second floor were much less hot, but still maintained a just-right level of warmth.

"How strange..." Xi Xi muttered to herself, comparing the temperatures on the third floor and the second floor over time. She eventually discovered that the temperature on the third floor was the highest, followed by the first floor, and the second floor was the lowest.

She sat back in the car seat and pondered for a moment before exclaiming in surprise, as if suddenly realizing something.

She was wrong... This wasn't a heating layer at all, it was an insulation layer!

The upgraded RV interior is clearly equipped with a temperature control function, which can automatically adjust the temperature according to the floor level!

Because hot air is lighter and cold air is heavier, hot air rises compared to room temperature air, so without temperature control, the temperature on the second floor is always higher than that on the first floor.

In fact, the physical properties of the original world are also like this, which is why the water heating and underfloor heating used in the northern region during winter are basically located at the bottom, while the air conditioning used in the southern region during summer is generally located at the top.

The third-floor courtyard is separated from the second floor by a terrace and skylight. When closed, they are not connected. The courtyard is exposed to the outdoors, and the glass is a very special type of softened glass, which has the lowest temperature. Naturally, the heating of the car walls is the highest.

Xi Xi was extremely satisfied with the newly reinforced interior walls of the carriage!

The RV, which had been flooded with seawater, was already a bit chilly. The cleaning talisman could remove the water but not the cold. As a result, the interior of the RV quickly warmed up and soon reached a comfortable temperature. They no longer had to huddle up!

Not only now, but in theory, by maintaining the interior temperature within a comfortable range, a motorhome can become a haven of spring-like comfort in both cold winters and hot summers!

Chu Zhiqin had been incredibly curious for a long time, and Xi Xi finally had a chance to sit down and tell her mother about what she had just seen and heard.

Just then, the message on the screen suddenly flashed, and Xi Xi, who had been wearing a relaxed smile, instantly lost her composure and became serious.

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