Looking out of the window, I looked out of the window, and beyond the wooden fence, there was a black dot that was faintly moving.

Although the outside of the castle was full of snow and cold to the bone, Chen Yuan's current eyesight could still tell that it was a person's figure.

After listening to some of the accounts of Yongjia's boss, Chen Yuan also has a new understanding of the current tide of exploration in Antarctica.

Not only countries, but also various institutions and companies have plans to send people to the country or prepare for Antarctic expeditions.

Therefore, Chen Yuan was not surprised at all after seeing this person.

The location of the castle is inside the South Pole, and it is not very easy for the average expedition team to go this far, but there are a few people who go specifically to reach the South Pole or have other purposes.

He stood in front of the window, his eyes fixed on the figure, because the distance was too far to see the face, but judging from the pace of the man, he walked more and more slowly, the speed of movement was very low, his steps were staggering, and it took ten minutes to move a little closer to the castle, in addition to the fact that the wind and snow were too great, and the exhaustion of the body was also partly due to the fact that the wind and snow were too great.

At this moment, a pleasant prompt sounded: "If you find a suspicious outsider, please go to the castle shop to buy the castle defense system immediately, and please go to the store immediately to buy the castle defense system!" ”

The chime becomes a little abrupt.

Chen Yuan didn't dare to be careless, and immediately opened the store page, clicked on the defense category, and saw that there were castle early warning system, castle monitoring system, castle status system, castle disturbance system, etc...... There is no military defense system.

Clicking on the castle warning system and looking at the price, Chen Yuan gasped, it was even divided into high, intermediate and low-level, even the lowest level also needed 10 million points, and the low-level early warning function was able to remind the castle owner when the visitor was a hundred meters away from the castle.

The intermediate warning system can warn and warn visitors when they are a kilometer away from the castle, but the price has climbed to 100 million.

The advanced ones can start warning from five kilometers away, and can judge the gender and number of people of the other party, but the price is quite amazing, and it takes one billion points.

This early warning is effective for land, sea and air, no matter where the enemy comes from, it can give early warnings, as long as the system judges that there are creatures or other things that threaten the castle, it will be the first time to warn.

Of course, what Chen Yuan wanted was high-end, but looking at the price, he could only give up, he had always thought that the castle was self-defended, but he didn't expect that he still needed money to buy it.

At the moment, you can only spend 10 million Huàn points to buy a low-level early warning system.

The next monitoring system and status system Chen Yuan clicked on it, the monitoring system as the name suggests is to install monitors around and inside the castle, but this monitor is very hidden, and then Chen Yuan can view the monitored images on the virtual screen in the house, but the price is not expensive, Chen Yuan thought about it, and could only choose to give up.

The last one is the castle state system, Chen Yuan clicked on it and took a look, the function on it said that he could freely change the state of the castle, the states were: manifest, invisible, and these two states are also divided into two sub-states, such as stealth can be distinguished into semi-stealth castle and castle full stealth.

The difference is whether or not the castle can be detected with a probe.

Chen Yuan couldn't help but feel moved when he saw it, but when he saw the price, he was startled again, this was the most expensive one he had seen in the store so far.

The semi-stealth function actually requires one billion points, while the full stealth function has directly increased tenfold to 10 billion.

The money that Chen Yuan earned a few days ago seemed insignificant in front of this money-squeezing castle, less than a dime, and the salary was indescribable.

He took a long deep breath, blinked, and when he looked again, he suddenly saw that there was a line of red letters under the function description of this state system.

Arrears?

Chen Yuan looked at the past word by word, and then realized that the state system of the castle had been turned on since the moment he got the castle, and it had been in a state of full stealth to prevent it from being detected by satellites in the sky, but it required castle points, and the daily points needed one million.

In other words, Chen Yuan owes tens of millions of castle points so far.

There is a hint later, if Chen Yuan does not repay these points, then when the arrears reach 100 million, the stealth function will be stopped, and the daily rental mode can no longer be used at that time, and can only be purchased at one time.

Can you rent it on a daily basis?

Chen Yuan was surprised and delighted, but after thinking about it, it would take 10 billion to buy the full stealth function, if you didn't use the daily rent, then the castle would have been discovered at the beginning, and then it would be directly occupied by the troops sent by countries such as the United States.

But so much money makes Chen Yuan really painful, he needs one million a day, and the money in his bank card is not enough to repay so many points owed, but fortunately, the stealth function will be stopped when the arrears reach 100 million points, and he still has more than a month to delay.

As for the latter castle jamming system, as Chen Yuan expected, as long as it is purchased, then when the outsider comes to a certain range of the castle, then all his electronic equipment will be interfered with, such as GPS positioning information will be re-modified, that is to say, even if someone enters the castle area, they can only record it from other places, and the information of the castle will not be leaked.

If it was before, there was already a full stealth function, and this signal jamming system would be very chicken, because even if someone came to the outside of the castle, they could not see the castle, but if someone stepped in, the castle would not really disappear, and it would still be able to touch the corresponding house, and the interference system would need to interfere with his direction and position.

"It should be expensive." Chen Yuan thought.

He slowly shifted his gaze to the price below and took a deep breath, which was really quite amazing, about the same price as the stealth system.

But the same as the stealth system, it can be rented on a daily basis, and one million castle points a day, but this castle has not been opened because no one has ever stepped on it except for Chen Yuan.

Now that an outsider is coming, and judging by the man's walking itinerary, it is likely that he will cross the castle, and it must be opened immediately.

And with the arrival of this person, it also reminded Chen Yuan that the exploration of the Antarctic by people in the world definitely exceeded his cognition, and the castle was not very safe even in the remote areas inside.

(Please read carefully in the next chapter, the castle has a full stealth system, it will not be discovered, and the protagonist also appears as an ordinary explorer, and will not bring people to the castle.) ）