"Everyone, refuel, we should be there in about an hour!" The leader of the tour was an archaeology professor in his fifties, whose hair was half gray, but who seemed to be in good physical strength because he was often involved in similar work.

In addition to this professor, there are seven other people in the team, one is the accompanying team doctor, who specializes in dealing with some unexpected situations, the fat man is in charge of everyone's food, the huge bag on his back contains all kinds of tools and ingredients, and the rest are some temporary recruits.

In addition to being old-fashioned, this professor is also easy-going, and Yu Hao and his party still have a strong student atmosphere, but the professor treats them as his own students, and he can be regarded as taking good care of them.

Along the way, the professor told them a lot about the ancient city, which was buried under the Gobi, and according to geological archaeological documents, this area was a desert a long time ago, and it was caused by a geological change hundreds of millions of years ago that caused the disappearance of this ancient city.

But strangely, there is never a narrative of the city, either in ancient books or in other literature, as if the city never existed.

Although there were no tools to record words or images at that time, the ancients still used some means of expression such as murals to describe some things, and some ancient cities that have been discovered a hundred kilometers away from that ancient city have been excavated, and these ancient cities should be dated to the same era here.

There are four ancient cities of this era excavated nearby, and the buildings of these cities are very simple and ancient, almost all of them are built of wood and stone, but there are already clear distinctions, such as roads, cemeteries, places of worship, etc., there are traces of civilization.

These four ancient cities were connected and traded with each other, and traces of their existence can be found in them, but the recently excavated ancient city was located in the middle of these four ancient cities, and there was no evidence of its existence until it was excavated!

Some of the professor's students participated in the previous expedition, and three of them also disappeared here, but before they disappeared, they sent the professor some photographs, which was a very mysterious and somewhat intimidating city.

There are a lot of ancient totems in this city, it seems that this is a place where religion or some kind of belief is very popular, and not only that, but you can see some strange murals on the streets and alleys, the patterns on the murals are very rough, but you can see something different from people.

Whether these represent God or something else is unknown.

But what everyone pays attention to the most is a very unique gate in this city, this gate is not a door in the common concept, but similar to an arched stone gate, but only a door frame, this door frame is fully 20 meters high, taller than the city and the buildings!

On top of that, this frame was the last material sent back by the professor's students, who have been missing since then and have not been heard from again.

The terrain of the Gobi Desert is very uneven, and it is almost impassable for vehicles, and they can only rely on their legs to get here, and they walked for about two days to finally find this ancient city.

Due to the large number of disappearances, and the fact that everyone knows that this city is a special place in this world that connects the world and hell, it should be a dark and strange place in the impression.

But when they came here, they were dumbfounded, what kind of capital is it, it has become a tourist attraction at all!

Before they entered the city, they had already heard the voices one after another, as long as the building structure of the ancient city would not be destroyed, there would be tents, and a large number of people would go in and out of this ancient city, not to mention too much, at least a dozen teams, two or three hundred people.

The professor's students had disappeared eight days earlier, and according to them, they had only one or two teams when they came here, and it seemed very quiet and empty, but in a week it had completely changed here.

They pitched a tent on the outskirts of the city, put down the belongings they were travelling with, and then left the team doctor and cook, and walked into the ancient city.

The buildings in the ancient city are very old, and many of the wooden buildings have decayed, so it is relatively arid here, so it is difficult for microorganisms to breed, and the preservation is relatively intact.

The people of the second class followed the team, and their eyes never left the dazzling murals on both sides from beginning to end, because the patterns on it were too terrifying, Yu Hao lived with his grandmother when he was very young, and the old people were generally very superstitious, and they were generally very sensitive to gods and ghosts.

Yu Hao once saw a picture album in his grandmother's Buddhist scriptures, the content of which was the tragic state of the eighteen layers of hell, Yu Hao was only five or six years old at that time, and almost left him some childhood shadows, and these patterns were actually somewhat similar to the original picture album.

"Huh? Someone ahead? After walking for a while, people from another group came up to them, but to everyone's uneasiness, their faces were a little pale, and their expressions were very indifferent, as if they hadn't seen them, and the professor greeted them, but the other party didn't even look at them.

Suddenly, the old professor's pupils shrank, and he took out his portable computer, on which there were photos of more than 20 people, and there seemed to be one person in the team just now who was exactly the same as one of the photos!

"Yu Hao, come and see, is this person the short man at the back of the team just now?" The professor suspected that he was a little embarrassed when he was old, and when they were young, he came to check.

Although he only glanced at it in a hurry, everyone was sure that the person just now was definitely the person on this missing list, and he was obviously still inspecting this ancient city in a dignified manner, how could he enter the missing list?

"There's something weird about this ancient city!" The professor instinctively realized that something was wrong, and from the moment he walked in, the whole city revealed an eerie atmosphere, which was really uncomfortable.

"Let's go find that door first, it should be the most distinctive thing in this city!" He proposed.

"Good!"

However, after dozens of minutes, a look of fear appeared on everyone's faces, this ancient city is not big, that is, an ordinary town is smaller, and the buildings here are not more than five meters, a twenty-meter high door should be very conspicuous, but they have been around for a long time and found an amazing fact.

There is no such door in this ancient city!