The four searched for most of the day, but found nothing.

Next to a relatively well-preserved building in the middle of the city, the four of them stood on the stone steps at the entrance with disappointed expressions.

"What the hell is this place, there's nothing left! I didn't see any water source! Yuan Hai complained.

"Something must have happened here! Even if you pack up and leave, you can't pack everything so clean! The Great Elder said.

"Whatever happened to him just now. Let's think about the solution to the water source! Ma Mingxuan said.

Liu Feng thought for a while and said, "It is impossible for such a big city to be without a water source. Are we missing something? ”

"What's missing? I'm looking for it room by room. I almost didn't dig three feet into the ground! Ma Mingxuan said.

Suddenly, a flash of inspiration flashed in Liu Feng's mind.

looked at Ma Mingxuan and said, "Dig three feet!" I see, we ignore the ground! ”

"Ground? What do you mean? Ma Mingxuan wondered.

"Not bad! Have you noticed that the houses here are all damaged, but the floor here is very clean and undamaged? Liu Feng replied.

After Liu Feng finished speaking, several people were shocked. Look immediately to the ground.

"No wonder I always feel that something is wrong! You see, these bluestone slabs are not damaged in the slightest. The weirdest thing is that these bluestone slabs look clean and have very little floating dust! The Great Elder spoke.

"Really! Now it seems that this place is really unusual! Yuan Hai nodded.

Rumble!

Suddenly, there was a loud bang. Several people were startled and immediately looked at the place where the voice came from.

"Not good! The exit is sealed! Ma Mingxuan exclaimed.

"Okay now, we're completely trapped here now!" Yuan Hai said in frustration.

"Huh? There's a wackiness here! Liu Feng suddenly let out a startled sound.

"What's wrong?" Ma Mingxuan hurriedly asked.

"There's a wind blowing out of here just now!" Liu Feng pointed to the building in front of him.

"Are you sure? It's all sealed here, how can there be wind? ”

"I'm sure I did feel a breeze just now!" Liu Feng said firmly.

Several people looked at this relatively well-preserved building.

It is an old-fashioned building, and although it is only one floor, it is as tall as a two- or three-story building. The hallway in front of the house is supported by nine carved dragon stone columns.

"Have you noticed that the carved dragons on these stone pillars are the same as the nine dragons on the platform when we entered?" The Great Elder looked at the stone pillars and said.

"Exactly the same!" Yuan Hai looked at it carefully and said.

"Let's go in and have a look!" Liu Feng said to a few people.

"Let's go!" The Grand Elder replied.

Liu Feng and the Great Elder were in front, and Ma Mingxuan and Yuan Hai followed closely behind. Pushing open the door, several people were slightly surprised.

In such an empty room, there was nothing but a three-meter-tall bluestone statue.

The statue is of a burly man, clad in battle armor and holding a spear. The expression is solemn and solemn, giving people a feeling of not being angry and self-assured.

"Who is this man?" Yuan Hai asked.

"Who knows! I specially got such a big house for him, and he must not be an ordinary person! Ma Mingxuan replied.

Liu Feng took a closer look at this statue, but he didn't find anything special.

"Did I just feel wrong? Where is the air outlet here? Liu Feng said a little confused.

"Look at the floor of this room, and the statue, it's all made of the same bluestone slabs on the road outside. And the statue and the floor of the room are very neat. The Great Elder said.

"Not bad! This bluestone is weird, as long as the ground paved by this bluestone is very clean! Could it be that this bluestone has a self-cleaning function? Liu Feng continued.

"Do you think the stone statue is a switch? Is there a hole in here? Ma Mingxuan said to a few people.

"Is this possible? Let's take a closer look at this statue! Liu Feng replied.

The four of them gathered around the statue, left and right, and carefully examined it.

"It seems to be carved from a complete piece of bluestone, and there are no buttons?" Yuan Hai wondered.

"It's definitely not going to be that simple!" Ma Mingxuan replied.

"Look at this!" The Great Elder said, pointing to a circular pattern on the statue's armor.

Liu Feng took a closer look and said in surprise: "This is very similar to the pattern on the platform before we came in, is this also a switch?" ”

"Quite possibly! Let's try it first! The Great Elder replied.

Liu Feng knocked on the pattern, but there was no response. It's clearly a whole with the statue, and it's not a mechanical switch at all.

"Maybe it's the same as the outside, you also need internal qi to activate!" Liu Feng said uncertainly.

Yuan Hai walked over and pressed his hand directly on the circular pattern, and said, "Just try it!" ”

After speaking, the internal qi is transferred to the pattern through the palm of the hand.

After a long time, there was no movement. Yuan Hai withdrew his hand a little depressed.

"Looks like this won't work!"

"I don't think so!" The Great Elder spoke.

"I've tried it all, what else is not necessarily?" Yuan Hai didn't believe it.

"When we come in, we don't just come up and just send internal qi, right? Maybe it won't work until a specific moment in time! The Great Elder said.

"If you say that, it's really possible!" Yuan Hai nodded.

"But I just don't know how long I'll have to wait?" The Great Elder frowned.

Ma Mingxuan thought for a while and said, "It shouldn't be too long, since this place is open once in a hundred years." Then this period of time should be fine, and it is very likely that it will also be in the sub-hour! ”

"Hmmm! Then let's wait and see. The back of this city hasn't been inspected yet, so let's go and see it again! Liu Feng said.

"Okay! We still haven't checked a piece, and we'll come back here when we're done! The Great Elder nodded.

Several people began to investigate the back of the ancient city again.

After another half a day, the four of them returned to the room where the statue was placed.

"Alas! This is the same situation as the front, or nothing! Ma Mingxuan sighed helplessly.

"There's no better way to do it now, just wait here and then! Let's see if there will be a situation in the end! Liu Feng replied.

The four of them had no choice but to sit here and wait quietly.

After a few hours, a soft white light suddenly shone on the statue from above.

Several people were shocked. Hurriedly got up and checked. This white light came very abruptly, it was obviously buried deep in the ground, and there was a roof on the statue. These tangible substances seemed to have no effect on the white light, and they shone straight down from above.

Liu Feng looked overhead, and could only see a white expanse, and nothing else could be seen.

Just as the four of them were looking closely, the statue suddenly lit up with a green light. The green light became brighter and brighter, and soon the bluestone floor connected to the statue began to light up as well. The ground was constantly glowing green. Soon it spread to all the bluestone pavements outside.

At this time, I heard the Great Elder suddenly say, "I know why some bluestone pavements are so clean!" Look, everything that is bluestone is now removing the dust and debris from it! ”

As soon as the three of them heard what the Great Elder said, they all looked at it one after another.

"It really is! It's incredible! Yuan Hai was surprised.

Liu Feng reminded: "I don't know how long this change can last, let's quickly try to see if we can open the secret passage!" ”

"Not bad! I'll try it first! The Great Elder nodded.

As he spoke, he pressed his hand to the circular pattern on the statue's chest. The Great Elder gradually released his internal qi and delivered it to the statue through the palm of his hand. At first, there was no obvious change, but as the Great Elder's internal qi transmission gradually increased, the circular pattern in front of the statue began to slowly change.

These patterns gradually light up, and then they are automatically arranged and combined as if they were alive.

The four of them stared intently at the change of the pattern, which soon stopped changing, and the pattern at this time had completely changed into another wonderful pattern.

Just as a few people wanted to take a closer look at what kind of pattern it was, a dazzling golden light shot out from the newly generated pattern. Several people were shaken by the sudden burst of golden light, and their eyes narrowed instinctively. The Great Elder also immediately withdrew his palm, watching the changes.

The group quickly got used to it, and when they looked at the pattern again, the golden light on the pattern had disappeared and turned into a raised green button.

The Great Elder nodded to the three of them, and then pressed the raised button hard.

There was a creak, and there was a muffled sound on the bluestone floor in front of the statue. The four of them immediately watched with alarm as the ground changed.

Soon, the bluestone ground was separated to the left and right, revealing a deep passage below.

"Let's go! Be careful! The Great Elder led the way into the passage.

The three of them did not hesitate, followed closely and entered the passage.

It's dark in the passage, but it's flat, and the four of them don't have to worry about getting stampered. After walking for about five minutes, I suddenly saw a bright light at the entrance of the passage.

The four of them were happy, and they stepped up and walked over.

When they came to the entrance of the passage, the four of them were stunned by the sight in front of them. This is simply a super underground city, much more prosperous than the ruined city above.