Chuxuan felt the huge water pressure was about to squash himself, and quickly used thunderbolt armor to protect his body.

When thunderbolt armor is used, the darkness in the deep pool is driven away. Finally, we can see the situation in the clear water.

There are fish living in the deep cold pool. They are not afraid of water pressure and low temperature. They swim freely in the water, looking carefree and magical.

After diving for more than 300 meters, we finally came to the bottom of the pool. At the bottom of the pool is mossy rock, about the size of a football field.

Remembering that the upper part of the pool was only 30 square meters, but the bottom of the pool was so large, Chu Xuan understood that it was an inverted funnel shape.

There is a circle of water waves in the middle of the pool, with bubbles coming out. Chu Xuan used to see that it was a boundary.

The boundary is no small, it is a round curtain barrier with a diameter of 89 meters. Chu Xuan thought of the mangque coming out from here. He estimated that there was another cave behind the border. He carefully explored it, but found no abnormality. He had the courage to jump down.

After jumping into the border, it is a downward ladder. The ladder is very long, with a total of 999 steps. All of them are paved with bluestone strips 30 meters long, 10 meters wide and 9 meters high.

It took about a quarter for Zhong chuxuan to walk through the stairs. At the end of the stairs was a nine meter high black tombstone with four large characters on the entrance of Donghua road palace.

But there was no other entrance or exit except for the tombstone. Chu Xuan squinted at the tombstone and searched for it, but he couldn't find any mechanism buttons or other things.

All of a sudden, a Taiji Yin and Yang engraving on the top of the tombstone attracted his attention. He wanted to see it with divine sense, but he found that the divine sense could not be explored. If he wanted to fly up to see it, the flying sword did not respond at all.

Chuxuan knows that this place is also the same as the outside, and he is forbidden to set it. The Shenzhi flying sword is useless here.

After thinking about it for a while, Chu Xuan decided to inject spiritual power into Taiji Yin and Yang engraving.

Chu Xuan was not willing to accept it, and then he put several spiritual powers in succession. When he got into the ninety-nine spirit power, he finally had a reaction.

"Hum, hum..." The white light flashed on the Yin and Yang carving of Taiji. Then the yin-yang fish on the map seemed to have come back to life, biting each other from head to tail, twisting nine circles to the left and nine circles to the right. Then, fog filled the engraved picture. Two lights, one black and one white, were thrown into the white fog, and they fell on the stone slab at the foot of Chu Xuan.

The stone slab was illuminated by black and white light, and countless green lines flashed on the stone slab, slowly converging, and finally formed a Taiji yin-yang diagram, which flew into the air and quickly rotated.

Click, click

The stone slabs on the ground rotate with the Yin and Yang diagram of Taiji in the air and begin to rotate like magic cube. Slowly, the huge stone slabs begin to separate like two sides.

After a few breaths, a corridor was separated from the stone slab, and Chu Xuan walked cautiously into the corridor.

The corridor is very long. It's full of twists and turns. There are many secret devices in the corridor, but they are blocked by thunderbolt.

These hidden weapons are all fatal to ordinary people, but they are not a test for friars.

When you come to the end of the corridor, you will see a big square in front of you. On a stone platform made of jade in the middle of the square, there are some fallen stone frames, some bamboo slips, Mudu and some jade boxes and bottles scattered on the ground.

To chuxuan's surprise, the Mudu and the Pearl River are not rotten, which is too unreasonable.