Yang Xiaotian did not hesitate, along with others, he broke through the surface of the river and entered its bottom.
The space at the bottom of the river was vast, and Yang Xiaotian and his companions flew forward; half an hour later, they finally arrived before a mountain wall with an inconspicuous little cave.
The small cave could only accommodate two or three people at the same time.
However, as Yang Xiaotian and his companions entered and flew along inside, the space inside the cave became larger and larger. After flying thousands of miles, a bright light appeared in front of them, revealing an extremely bright and majestic underground world.
This underground world was lush with flowers, plants, and trees, exuding various fragrances.
In front, mountain peaks incredibly taller than those outside loomed, many times larger.
Who could have imagined such a Heaven and Earth existing beneath this dragon cave.