Black holes, and passwords.

These are the two most important elements about the ultimate secret.

A real black hole, like the time chaos that Lin Feng had encountered before, is bottomless. Humans cannot understand the world below. It is very likely that as Chen Fusheng said, there is really some kind of unimaginable life below.

The password is a golden line, or a model of infrasonic waves that Lin Feng has seen.

Hu Yongquan had explained the infrasonic wave to Lin Feng before. This is a very low frequency sound wave that can be transmitted over a long distance.

Whether humans rely on hearing or feeling, they cannot detect the existence of infrasound waves.

However, this kind of inaudible sound wave is not completely unpredictable. At least in the world on the ground, there are still many animals in nature that can capture and sense infrasound waves.

So what is the function of the password? Lin Feng finally realized it suddenly.

As mentioned earlier, the black hole code, that is, the model of infrasound waves, can produce real infrasound waves through high-tech equipment (of course, the premise is that there is such high-tech in the world), and the direction of these infrasound waves propagation must be directed to the black hole.

Although the black hole is bottomless, infrasonic waves can obviously travel through the long darkness and reach the deepest part in that environment.

Lin Feng now has every reason to believe that the mysterious living body that Chen Fusheng imagined, that is, what he wanted to use the Great Wall to suppress two thousand years ago, would definitely be able to sense this infrasonic wave.

The following situation is easy to understand. The infrasonic wave transformed through the black hole code (model) is like a signal or an inducement that can awaken or disturb the "thing" under the black hole. If that "thing" appears on the surface of the world, it will be a destructive consequence that no one can stop.

So, is the so-called ultimate password just what Lin Feng understands?

In fact, Lin Feng himself was not sure, but at least he felt that at least sixty or seventy percent of the possibility was true. It was precisely because of this reason that Chen Fusheng did not allow anything related to the black hole code to exist, and he would immediately destroy it when he saw it.

Of course, Lin Feng was an accident here.

Chen Fusheng did not destroy others.

Thinking of this, Lin Feng couldn't help but recall the scene he saw when he used the brains of unknown creatures to enter the illusion.

What he saw was countless destruction, and each destruction was so thorough, and he believed that that destruction could really be a wise power, so it was so targeted.

The destruction on Earth targets human civilizations. No matter how powerful they were in the past, even if they were creatures on the top of the food chain in this world, they could not escape or stop this destruction.

After the destruction, the few remaining survivors had no choice but to escape, escape to the depths of the ground, and began a dark life, and then degenerated into unknown creatures like humans.

This result is a devastating disaster and nightmare for everyone.

After all, no one wants their descendants to become something that is neither human nor ghost.

There is absolutely no one.

Thinking of this, Lin Feng couldn't help but think that Chen Fusheng is very great.

This greatness is not like the greatness of a mother to her children, but is reflected in her care and love for the whole world.

He relies on his own strength, worked hard and worked hard, and was determined to save the world, even at the expense of his own life.

This man, who was full of mystery all over his body, became more and more mysterious and taller in Lin Feng's heart.

There seemed to be a halo above his head, like a saint who saved the world and helped others.

It is precisely because of this that Lin Feng became even more curious, curious about who he was. This strong curiosity made Lin Feng feel unbearable to catch it, but he had to bear it.

Because he knew that as long as Chen Fusheng didn't want to say it, he wouldn't even say it even if he had a knife on his neck.

He is so unique.

After Lin Feng's messy thinking, the people around him had already discussed the direction and had sent someone to explore the way first.

Then, Lin Feng and his team began to move forward with the established line of defense. As they continued to deepen, various traces of artificial excavation appeared around them, becoming more and more obvious. They even saw a lot of things abandoned here, but they were basically damaged and there was no need to take away. Like those rusty picks, they were centrally treated.

Another advantage is that although the terrain of the underground space is very complex, the Qin people at that time seemed to spend a lot of manpower to open up a relatively wide road in order to facilitate construction here.

This road has been accumulated over thousands of years, but has not changed much, but is still so smooth.

This made Lin Feng and his team much more convenient. It is even certain that as long as you walk along this road and nothing unexpected happens, you will definitely be able to reach the excavation site of the Qin people at that time!

The cave was not only deep, but also amazingly wide. Lin Feng and his team walked on the road built by the Qin people. There were mountains of gravel on both sides, and they were all covered with large and small pieces of stone everywhere, making them feel like they were walking in a Gobi Desert.

Lin Feng and his group walked along the main road for about half an hour, and the terrain in front suddenly lowered.

The group carefully approached and observed it and found that it was a slightly sunken huge area. This area roughly looked like an irregular circle, and several sides of this circular area all had very wide cracks extending to other places.

Lin Feng looked carefully and found that the cracks should have been formed naturally and had nothing to do with the Qin people.

In the center of this circular sinking area, Lin Feng saw a large pit, an obviously man-excavated large pit.

The diameter of this big pit is not very exaggerated, but it is an unimaginable miracle to be able to dig such a big pit so deep in two thousand years ago.

Lin Feng and his group did not rush to get closer. They took out the telescope and observed it from a distance. Lin Feng saw at a glance that there was a stone wall made of stones about ten meters away from this huge divine pit. The triangular glasses on it told Lin Feng...

That is the curse source carrier!
Chapter completed!