Tang Feng is the first time to use this kind of infrasonic communication instrument, this thing is almost a circle larger than the walkie-talkie, and there are buttons on it, which is similar to the keyboard of a mobile phone. However, this thing is more troublesome to operate, because it can only be fired letter by letter, and cannot be connected together.

Therefore, if Tang Feng wants to send a phrase "I am safe", he has to launch it seven times in a row, because this phrase is composed of seven English letters. But although it's very troublesome, it can still transmit information in this environment, and this communicator is quite awesome.

If Tang Feng had this kind of artifact on his body when he was buried, he would definitely not have been buried for eight and a half days at once.

Now that it is temporarily safe, of course Tang Feng has to send a safe message to the outside as soon as possible, Tang Feng knows that he has fallen, and the people outside must be crazy, and now sending a safe message can at least stabilize the hearts of the people outside.

Of course, Tang Feng didn't dare to guarantee whether this thing could really transmit the message, so after sending out these seven letters, Tang Feng put the communicator in his pocket and began to explore the surrounding environment with a gun.

More than twenty special torches illuminated a large area of the space very brightly, but there were still many dark areas in the distance. But fortunately, there is an underground lake on one side of this area, and Tang Feng only needs to go in the other direction.

The small searchlight overhead was enough to provide sufficient illumination for Tang Feng, who walked in one direction for about two minutes, and estimated that he had left the torch circle for more than a hundred meters before he encountered the rock wall.

Tang Feng began to grope his way along the rock wall, but after turning around the rock wall, there was no way out at all except for a cave in one place that he didn't know where to go.

And this time. The communicator in his pocket suddenly vibrate, Tang Feng took out the communicator and looked at it, and a smile immediately appeared on his face, and several English phrases were displayed on the screen, which combined with the meaning: "Don't panic, wait in place." Rescue is coming soon! ”

Tang Feng returned to the camp fenced with torches, sat on the mat and thought for a while, and then sent a message: "Don't come to the rescue for the time being, I'm looking for a way out, and we'll be in touch in three hours." That's an order! ”

The reason why Tang Feng sent such a message was also considered. At the speed of that underground river, I drifted for more than two hours. At least they have drifted out for more than 20 kilometers, although they have not encountered any danger along the way, but if they want to return the same way. It is definitely impossible, such a rapid current speed, the boat can not go upstream, even with a motorboat, I am afraid it is impossible to control, because under such a turbulent water upstream, the force between the thrust of the motorboat engine and the current will definitely make the motorboat unable to maintain a forward attitude, and the river is narrow. If there is a bad trouble, that is, the ship will be destroyed and people will be injured.

Instead of having rescuers come and do the rescue. It's better to let them postpone the rescue, anyway, there is no danger now, but if those rescuers come, maybe there will be another group of people who can't get out.

Anyway, it's already the case now, it's better to try to find a way out first, if you can find it, it's naturally the best. If you can't find a way out, then find a way to rescue. The main thing is that if those rescuers come, those things in their own space will definitely not be usable, so wouldn't they be asking for trouble for themselves?

There is a star core in space. Even if you live underground for a few years, there is no problem, but what you want in the star core space, it is absolutely not a problem to maintain your life.

And I just found a cave that I don't know where it leads, so maybe I can find my way out from that cave!

It is precisely because of this that Tang Feng issued such an order.

After taking out some food and water from the space and filling his stomach for a while, Tang Feng grabbed his gun and walked towards the cave.

The cave was about three meters high and four meters wide, and the cool breeze blew out from it from time to time, which shocked Tang Feng's spirit. It's good to have wind, and if there's wind, it means that the cave should be deep and likely to be connected to the outside world. Because if there is no air flowing in this cave, it can only mean that this cave is a closed cave.

After walking along the cave for about twenty minutes, Tang Feng felt that something was wrong, because the ground of this cave seemed to be too flat, almost no different from the cement floor at home, and the rock walls around this cave did not seem to be naturally formed, because from the entrance of the cave to here, the surrounding rock walls almost did not change, if it was a naturally formed cave, how could there be such a flat ground and such a regular rock wall?

It is more appropriate to say that this is an artificial passage than a cave.

How could there be such an artificial passage here?

Don't

Tang Feng's mind suddenly remembered a famous existence - the South American Tunnel!

In June 1965, Argentine archaeologist Juan Brown. While preparing to conduct an in-depth study of the various tribes and ethnicities in Ecuador, Moritz stumbled upon an unimaginably large underground tunnel.

Moritz did not announce the news to the outside world at the time, but after surveying hundreds of kilometers of tunnels and discovering many artifacts, it was not until 1969 that he asked to meet with the President of Ecuador and report to him about the tunnels. In July 1969, Juan? Moritz obtained a notarized certificate authorized by the Ecuadorian state certifying that he had ownership of the Ecuadorian underground caves, subject to the control of the Ecuadorian national government.

Located at a depth of 240 meters, the tunnel is part of an extremely large and complex tunnel system, estimated to be more than 4,000 kilometers long, and it is not known where it eventually leads, but only a few hundred kilometers in Ecuador and Peru have been examined and measured.

After Moritz announced the news of the tunnel, the German writer von ? Deniken had entered the tunnel with Moritz himself. The grandeur and grandeur of the tunnel project stunned even the writer, who was known for his bold imagination. He has no doubt that this is our biggest project in the world, and the biggest and most difficult mystery in the world.

In this tunnel, there are countless extremely precious ancient relics of great cultural and historical value to mankind, and there are many things that cannot be explained at all, making this tunnel extremely mysterious, and many people even believe that this large tunnel should have been dug by an alien civilization. Because among those items found, there are many things that were not made by earthlings more than 10,000 years ago! (To be continued......)