As we entered the inside of the mountain, the heat outside the mountain suddenly disappeared, and the people walking in the tunnel suddenly felt a cool feeling on their bodies.

As the time of entering the cave grew longer, everyone completely adapted to the dim light in the mountain. Soon, everyone felt that the space in front of them became wider, and it turned out that they had come to the center of the empty mountain.

The light in the Black and White tribe came from the top of the cave in the middle of the mountain. After everyone came to the center of the mountain, they subconsciously looked up and watched. It turned out that the Black and White tribes got many pearls from somewhere, embedded on the top of the cave to illuminate. With the help of the faint yellow light emitted from these pearls, there would be a trace of light in the entire cave.

With the faint glow of the pearl, everyone looked at the empty area living in the middle of the mountain.

This space is more than twenty feet high and is a hundred feet wide. There are many large stone pillars in the cave. Each large stone pillar has a diameter of more than ten feet long. Most of the stone pillars are dry, but there is a stone pillar with a diameter of about twenty feet but wet, and there are water droplets inside the stone pillars.

Some people from the Jade tribe listened to him, and a gentle sound of water flowing came from the stone, as if the stone pillar was hollow and there was a stream flowing inside.

Situ Wujie pointed to the water-seeking stone pillar and asked the Black and White people leading the way, "How could your mountain-headed stone pillar seep out water?"

The Black and White people leading the way explained: "This stone pillar is not used for the top mountain. This is the fountain stone pillar. This fountain stone pillar is located in the center of the Black and White Mountain. There is a large fountain under the stone pillar. The stone pillar is hollow. The water in the fountain just follows the hollow stone pillar and is transported to the top of the mountain."

Yu Wanqi, a junior and middle-aged member of the Jade tribe, asked: "What's the use of transporting this fountain to the top of the mountain?"

Yu Wanqi knew that it would be very difficult to build a mountain into a city. Every fortification probably implies various special effects, so this fountain stone pillar should also have some magical effect.

The lead man said, "Our mountain is hollow. In normal times, as long as the wind blows, the air in the mountain will be exchanged with the air outside. People in the mountain can breathe fresh air and the water foam in the cave will also evaporate. But if there is a windless day, the air in the cave will not flow smoothly, and people in the cave will feel stuffy. At this time, the benefits of the fountain stone pillar will appear."

Yu Wanqi asked again: "What are the benefits?"

The Black and White people leading the way replied: "When the fountain stone pillar transports water to the top of the mountain, it will turn into water foam and fall into the cave. The water density in the cave will increase, the air will become very fresh, and people will not feel stuffy."

It turns out that this fountain stone pillar is a magical object to improve air quality. If this person lives in a mountain, the most important thing is to have air circulation. Therefore, this fountain stone pillar plays a very important role in the way of survival of the Black and White people living in the mountain.

Situ Wujie couldn't help but wonder: "Did you all accomplish such a huge project by you, the Black and White people themselves?"

The Jade tribe who led the way smiled and said, "How can we have this ability? It is said that it was during the Naked Heaven era, when the desert was hot and there was a fierce sand attacking people. The sand god invited the gods to hollow out the mountain as his residence. The mountain seemed to collapse after it was hollowed out. Fortunately, the Iron God injected the iron soul into the soil, which made the entire mountain resilience and could stand in the desert forever."

The Jade tribe who led the way paused for a moment and continued: "When the axe split into the seven continents, the world was once submerged in the vast ocean, and this black and white mountain sank into the bottom of the water. Later, the prehistoric land gradually receded, and this mountain and Egypt came to the surface again. Our ancestors found it in the desert and settled here, and we were derived from our black and white clan."

The Jade tribe who led the way generally stated the origin of this mountain, but it was slightly different from what Situ Wujie saw in "The Book of Neighboring Heavenly Realm". These were the results of the time deduction process, and later generations unconsciously added subjective speculation. As for whom the statement is more accurate, it is hard to explain.

The Jade tribe members remembered the ancient things that Situ Wujie said just now, which were basically consistent with what the leader said, and couldn't help but be amazed. Yu Zhihua, who is the Jade tribe's name, said: "It turns out that this black and white city is really built by a god. No wonder this mountain city is so majestic. It seems that the power of our human race has never reached the level of the gods!"

Yu Zhihua said that sentence in her era, but if she said that sentence in the later era of Earthlings, it would be a big mistake. The fortifications built by humans in the later era of science and technology can be as majestic as the Black and White Mountain City. Various architectural techniques can be said to be not only not at all lie, but also more exquisite than the construction techniques of the gods.

While speaking, the leader of the Jade Clan led everyone to a staircase towards the top of the mountain. Walking on this staircase was wet and cool. It turned out that the water foam in the fountain stone pillars that the guide said was flowing down the staircase. Because the mountain was very high, when it flowed to the bottom, everyone could only feel a trace of coolness, but could not feel any water vapor.

After walking along this staircase for a while, everyone came to the second floor of the mountain and continued to follow the second floor staircase toward the third, fourth, fifth floors, etc., layer by layer.

The stairs connect many tunnels with all connections. Sometimes people from the Black and White tribes will encounter people from the Black and White tribes. Some tunnels may have corners, so they are pitch black, and some tunnels end with a bright light, reaching directly outside the mountain.

When they walked to the ninth floor, everyone finally saw the big fountain. The fountain had a strong spray force. Even when they reached the top of the mountain on the ninth floor, they still had a very strong force and impacted above the strong cave top.

The fountain hit the top of the cave and immediately splashed into countless water foam, falling on everyone's heads. Everyone was as if bathed in a fine mist waterfall. The fountain flew out from the hollow core of the fountain stone pillar.

This ninth floor is the last floor inside the Black and White Mountain. Follow this stairs to go up and then you will reach the outside of the mountain.

As soon as they left the mountain, everyone's eyes suddenly lit up. A huge square appeared at everyone's feet. In the square, there was a relatively small six-story city tower. Four characters were also engraved on the edge of the city tower. These four characters were much smaller than the four characters in the black and white outer city. The four characters were - "Black and white inner city".
Chapter completed!