The Ten Thousand Beasts Mountain Range is located in the southwest of the Yanri Continent, this mountain range is vast, countless peaks stand in it, and a large area of primeval forest breeds many rare plants and countless exotic beasts, and it is also accompanied by strange stories widely spread. Ancient books record that the Ten Thousand Beasts Mountain Range is more than 100,000 kilometers in circumference, it is said that in addition to all kinds of wild beasts in this mountain range, there are often demon beasts infested, and there have been immortals with vast magical powers who have entered the depths of the mountain range, and have never come out. The story of this mountain range became more and more spreading, and over time, the common people only dared to cut wood and hunt at the edge of the mountain range, and no one was willing to go within a hundred miles of the mountain range.

At the edge of the mountain range, among the towering mountains, there is actually a small mountain village, this mountain village is not big, but it is very harmonious, the villagers are men and women weaving, they are happy, just like Tao Yuanming's paradise. The water is full of rice and leaves, and the sunlight penetrates the trees and the smoke is low. The yellow warbler also loves the new cool and good, flying through the green mountains and crying in the shadows. The Southern Song Dynasty poet Xu Ji's poem "New Coolness" is exactly in line with the scenery of Yangliu Village at this time. The reason for the name of Yangliu Village is mainly because the whole village is mostly composed of the surnames Yang and Liu. It is said that the predecessors of the two Yangliu families are officials in important positions in the previous dynasty, one is the prime minister of the dynasty, and the other is in the position of a general, two hundred years ago, because of dissatisfaction with the corruption of the imperial court, many times the advice was ineffective, and the coup d'état was launched in anger, and the family members were slaughtered countless times, and the remaining clan elders were forced to helplessly, leading the two families to flee to this inaccessible valley and build such a small mountain village. Two hundred years later, Yangliu Village has formed a small mountain village with more than 80 families and 400 people, and it is necessary to climb several mountains to the outside world, so they rarely interact with the outside world, generally the two surnames intermarry with each other, most of the two families are relatives, and only a small number of foreign surnames have moved in for various reasons. There is a big waterfall behind the village, the waterfall is hundreds of meters high, the water flows down from the mountain, forming a big lake, called "Bishui Lake", the Bishui Lake is extremely clear, there are countless fish and shrimp in it, feasting the mouths of the villagers, of course, this has also become a paradise for children. It was early autumn, and at sunset, the night lights were on, and the adults who had been busy in the fields all day were walking home in twos and threes. The children don't care, this is their best time to play, and at the moment, there are five children in the lake who are having fun in the lake. These five children are all about eight or nine years old, the tallest, fair-faced child is called Liu Yun, the long black and strong next to him is his cousin Liu Feng, and there are two children surnamed Yang, the beautiful eyebrows are Yang Mingyang, the short little fat man next to Yang Mingyang is called Yang Yufei, is Yang Mingyang's younger brother, the youngest is a beautiful little girl with two pigtails, red lips and white teeth, her name is Liu Yuer, and she is Liu Yun's own sister. These five children are close friends from childhood to adulthood, they grew up by the lake, often catch fish and shrimp by the lake, play and have fun, so they are not afraid of water at all, this blue water lake is their favorite place to play.

"Let's compete again!" the little fat man Yang Yufei proposed.

"Okay, good", Liu Yuer likes to play the most. After discussion, they decided to see who would reach the big bluestone on the west side of the lake first, which was a kind of competition they often played. With Liu Yu'er's shout, several children quickly moved into action, swam to the west side of the lake together, and then dived underwater together. The fastest swimmer was Yang Mingyang, a child with a calm personality and no shortage of intelligence, with good physical coordination, and was the first to reach the destination. However, instead of joy, a stunned expression appeared on his face, and then several children who arrived were also stunned, it turned out that their destination, the big bluestone, was gone, leaving behind a cave that could be entered by two people at the same time. The children looked at this hole curiously, but they didn't expect that there was such a big hole behind the big bluestone that they used to play with.

"Let's go in and see". The little fat man Yang Yufei is the most anxious.

"It's so dark inside, I'm afraid." Liu Yu'er is a girl, the youngest, and not very bold.

Seeing that several boys wanted to go in and have a look, the eldest Yang Mingyang said: "Okay, let's go in and have a look, everyone be careful."

The children's curiosity drove them inside, and even the least daring Liu Yu'er crept behind. Yang Mingyang, the eldest of the five, is ten years old this year, with clear eyebrows and beautiful eyes, a calm personality, usually bold, and takes good care of a few friends, and fights very well, so he has become the boss of this group of friends. At this time, he was walking in the first place, reminding his friends from time to time to pay attention to the head and the ground. The cave was very dark and very humid, but luckily there was plenty of air. The children walked about a hundred meters forward along the cave, slowly getting used to the faint light in the cave, and saw that the path ahead of the cave was completely flooded, which was not difficult for the children who had grown up by the lake.

"Shall I go down and take a look first?" Liu Yun is the second oldest of these children after Yang Mingyang, and he usually has a lot of methods, and he has a great say in several children.

"Then you have to be careful not to stay underwater for too long." Yang Mingyang was worried that it would be dangerous for his younger brothers and sisters to go down, so he wanted to go down to take a look first, but Liu Yun and he were the best among these children, and they were usually more stable in doing things, so Yang Mingyang was still more relieved when he went down.

Under the gaze of everyone, Liu Yun shook his arms, moved his legs and feet, and then his body was vertical, like a loach, he burrowed into the water, causing ripples on the surface of the water, and then disappeared. Several children immediately nervously looked at the water that was gradually returning to calm, waiting for the news brought by Liu Yun.

"My brother will be fine, right?" Liu Yu'er, who had just turned eight years old this year, grabbed the corner of Yang Mingyang's clothes and said worriedly.

"It's okay, your brother's water nature is still not at ease. After listening to Yang Mingyang's words, Liu Yu'er was a little relieved, but she still looked at the water intently, and her eyes didn't move. After ten minutes, it was like a year for the children.

"Shall I go down and have a look?" said the anxious Yang Yufei, and Liu Feng, a black boy next to him who didn't like to talk, was also eager to try, ready to go down and find out.

"I'll go." Yang Mingyang is worried about the two younger brothers, and he is also worried about Liu Yun underwater. He moved a little, ready to jump into the water. At this moment, there was a sudden splash on the water, and a human head emerged from the water. It was Liu Yun who had just dived into the water that emerged from the water.

"There is a stone staircase not far ahead, and there is a stone gate on it, I am afraid that you are worried, so I haven't gone up to see it. Liu Yun wiped the water on his head with his hand and said excitedly. The children happily discussed, and their curiosity made them forget their fears, and finally decided to go in and have a look together. The children happily jumped into the water and, led by Liu Yun, dived into the water and swam forward.