This underground palace is located hundreds of meters underground and is very hidden. If the family elders practice here, only in emergencies can outsiders awaken the family elders from the state of meditation through special communication methods.

…

With a muffled sound of "touch...", Zhang Tie closed the door of the underground palace, locked the thick alloy door of the underground palace like a bank vault door from the inside, and then looked at this place seriously.

This underground palace is a very strange-looking place, and its structure is also very special. The entire underground palace is a huge circular space covering an area of ​​tens of thousands of square meters. It looks a bit like the Chinese Tai Chi diagram, half yin and half

Yang. The Yang half is an obvious artificial construction, while the Yin half retains the style of a natural underground cave. When the two are put together, the feeling is not abrupt, but very coordinated and harmonious.

Match.

On one side of the obviously artificially built underground palace, there are also divided into some rooms with different living functions. There are also a lot of high-grade fluorite on the walls here, making the space here very bright. On the other side, it remains

The places with natural features are completely dark.

There are a large number of high-level crystal pillars as tall as one person in this underground palace. Those crystal pillars are not born, but were placed in the underground palace later. Because of the existence of those crystal generators, the energy in this underground palace is very high.

It is so active that people feel very comfortable as soon as they come in. Practicing in such an environment will undoubtedly help people maintain a better state.

In addition to those crystal pillars, the other half of the underground palace, on the ground that was deliberately created to be in a natural state, is planted with a large area of ​​various underground plants that can generate fresh oxygen without relying on natural light, because those

The presence of plants makes the air in the underground palace very fresh.

Two streams with different water sources and different directions also flowed on the ground between the plants. In each stream, there was a group of happy, glowing red fish swimming in the water.

The black pine nut-like fruits and some strange petals of the plants planted on the edge fell into the stream, which became food for the small fish.

The water source is living water from the underground river, which can be drank directly. The fish is not an ordinary fish, but a special fish that is extremely picky and sensitive to the living environment. If there is a problem with the water, the fish will be the first to do so.

If one dies, it will give an early warning to people who want to drink water. There are two different underground water sources. Even if one has a problem, the other can be used as a backup.

Without opening the underground palace door, the living supplies stored here can allow a family elder to practice here for fifty years without any shortage.

Zhang Tie once again felt the privilege enjoyed by the family elders in a family. Such a place for practicing and retreat is considered a luxury for anyone. To build such a place hundreds of meters underground

The underground palace, and the construction of this underground palace so ingeniously and meticulously that no one can find any omissions, is really not something that ordinary families can do.

Zhang Tie walked around the underground palace and felt completely relieved about this place.

On the stone table in a room in the artificial building area, Zhang Tie also saw his twenty-one earth element crystals shining with a layer of yellow light.

Zhang Tie, who picked up an Earth Element Crystal, smiled and swept all the Earth Element Crystals into the Black Iron Castle with a wave of his hand. Then, Zhang Tie himself entered the Black Iron Castle...

Since going to the ice and snow wasteland, Zhang Tie has not entered the Black Iron Castle during this period of time.
Chapter completed!