It took only half an hour to dig a hole inside the stone mountain, but the subsequent work of manufacturing and installing the heating system and ventilation system was more trivial and troublesome than he thought.

As a patient with obsessive-compulsive disorder, Renault adjusted the structure of the cave several times in order to arrange the pipelines neatly and beautifully, which also wasted a lot of time.

It took more than five hours to finish all the work, and it was almost early in the morning.

After the thermal magic heater was started, the warm wind began to flow in the 10 caves with the sound of the fan''s "whirring", and the originally cold caves soon became warm.

Then, under the organization of Charlotte, a civil servant of the Department of civil affairs, slaves who had been suffering for half a night in the cold wind outside the cave swarmed in. After feeling the warmth coming from their faces, they could not help smiling in surprise on their frozen white faces.

After the last Island guard entered the cave, the wooden door of the cave was immediately pushed up, completely isolating the cold wind from the door.

Renault can''t help sighing. This very long day is finally over.

From landing on the mainland in the early morning until now, he has been spinning for almost 16 hours in a row, and he has also experienced a series of wars. Even though Renault''s physique is far more than ordinary people, he is very tired at this time.

In Renault''s opinion, the days when he lived in the cave were so boring that it exploded. He just ate, slept and ate all day. At ordinary times, he could only pass the time by "going to the bottom of the sea to touch conches and seashells" and "studying how to cook delicious food".

When he wandered out of the cave, he saw big birds passing from a distance more than once, sometimes wandering over the island of Kulun for a while.

In the cold winter months when the temperature is extremely low, almost all the fish hide in the deep sea. In addition, Shanghai is windy and snowy most of the time. How can big birds come here to hunt?

Thinking with toes, we all know that this must be the magic eye sent by the black Orc army.

Especially on the second day after the tragedy, Renault spent more than three hours wandering outside. During this period, he saw the magic eye at least five times. Considering the time he lived in the cave, I''m afraid that the number of times the magic eye passed through Kulun island was not less than 10.

It is obvious that the furious black Orc army must have adopted the method of dragnet search to find the trace of the enemy.

But after they set up the camp, they have cleaned up the traces all night long. In addition, all traces on the island have been covered up by the strong wind and heavy snow all night long. Magic eye can''t find anything from the sky hundreds of meters high.

If they visit the island, maybe they can find some clues.

Unfortunately, there is an iron rule that magic eye will never fall to the ground when investigating, so they are doomed to be busy.

Renault has more than once produced the idea of "beating the magic eye down".

After winter, seabirds almost disappeared. He hadn''t eaten fresh bird meat for some time. However, when he thought that it might disturb the upanists, he forced to restrain this impulse and watched a large pile of bird meat fly away.

In the process of playing in the waters near Kulun Island, Renault found a kind of strange conch, which is called Haiyin conch by people from other countries.

This kind of conch is relatively small, the longest is only half a meter long, the surface is gray, consistent with the color of the seabed sediment, and the shell is also dotted with many black spots.

The meat quality of conch is slightly coarser than that of razor clam, and its taste is only average, but it has a magical characteristic.

This feature reminds Renault of a saying on earth: if you put a conch in your ear, you can hear the sound of the sea.

Many people believe this, because when you are close to the conch, you can hear something similar to "sea breeze".

In fact, the conch is just a "sound amplifier", similar to the principle of a loudspeaker.

In essence, sound is only the vibration of the air, and the air disturbance caused by the external noise will be transmitted to the inside of the conch. Due to the unique structure of the shell, the sound will vibrate back and forth in the shell, and constantly produce resonance.

So, the sound is amplified, and there will be ups and downs, it sounds like waves of sea breeze.

In fact, this kind of sound has nothing to do with "the sound of the sea", it is just a strange distortion of the external noise.

To be more vulgar, even if you fart near, the sound you hear in a conch is also the sound of the sea breeze.

If you put the conch in a quiet room, and then put the monitoring device next to the conch, you will find that the sound of the sea is gone.

(people''s breathing sound is also amplified, so they can only use monitoring devices)

but the alien world is different. There are many exotic creatures in the alien world, and the conch is one of them.

It can really make the sound of the tide.

You don''t need to put your head close to it, just put the conch on the table. You can hear waves of sea tide clearly in the whole room, and the content of the sound is quite rich.

There are the rolling sound of the sea, the splash sound of the waves, the sound of the tide beating on the rocks, and even the sound of seabirds singing.

What''s more amazing is that every conch makes different sounds at different times, and different conchs make different sounds.This is related to the living environment of the conch. For example, the sound of the conch found in the sea area with frequent storms often includes the sound of storms, while the sound of the conch found in the sea area with many reefs is more likely to make the sound of shoals.

This kind of magical phenomenon has something to do with magic.

According to Renault''s understanding, it should be the magic energy accumulated in the shell of the screw that causes the vibration of the air and simulates various sounds.

As for why the sound changes over time, Renault speculates that it is probably environmental noise that changes the distribution of magic power in the shell.

When the magic energy is released slowly, the air vibration will follow certain rules, and finally restore the sound of the living environment perfectly.

Although the conch is only a kind of interesting plaything, it is not practical, but the significance it represents is not simple.

Because it means that magic can transmit sound.

After understanding this, Renault immediately thought of a thing - telephone!

If we can figure out how magic can control the vibration of the air and create the corresponding runes, the key problem of the telephone will be solved?

More than that, record player, Walkman and even radio can be solved in this way.

In this time of lack of entertainment, once the record player and Walkman are produced, it means huge wealth, at least millions of jinnals.

The significance of broadcasting is even more significant. Besides bringing money, it can also control public opinion.

Just thinking about these things and the "money" they represent, Renault''s heart jumped.

A little more divergent thinking, what if there is a rune that can transmit images?

With the Rune of transmitting sound, there will be TV? Isn''t there a movie?

The "little movie" that otaku people dream of also has!

Renault comes from the earth, and he knows how great the benefits behind these things are.

Without mentioning TV and movies, you can easily become the richest man in the world by selling "little movies".

This is absolutely not bullshit. Unlike animals, alien people only have estrus at a fixed time. Like people on earth, both men and women are estrous all year round.

This means that people aged 15-150 are potential users.

With such a huge customer base and such a long demand duration, can there be a more profitable business?

In addition, haiyinluo also points out that although there is no electricity in the alien world, with the help of magic power, it can realize all kinds of technologies related to electricity.

If it''s in Xianxia world, I''m afraid Renault can''t help praising it: three thousand roads, all roads lead to the same goal!