Although the language of the "daughter country" is difficult to understand, with Li Ang's current mental strength, he can gradually understand what they say after some exploration, and he can slowly communicate with them.

"Have you ever seen a girl with a strong man", Li Ang danced with his hands, and with his soul painting skills, he finally described the appearance of Mu Mu's father and daughter.

"They've been to us." The leader of the daughter kingdom spoke, and handed Leon a roll of animal skins.

I'll go? Really been there? Li Ang also had a fluke mentality, but he didn't expect that there would really be news of Mu Mu.

The animal skin is a letter, and it was written by Mu Mu to Li Ang, after all, only Li Ang could come to her.

Mu Mu did fall from the magma waterfall like Li Ang, but she couldn't fly, and she couldn't jump as high as five hundred meters, so she could only wander around, looking for a way back, the letter said, Mu Mu was going to go all the way north to see if she could get to the end of this underground world.

Now that there is news of Mu Mu, Li Ang is of course ready to go.

"Eh~~ Which side is from the north?" Looking at the orange-red dome, Li Ang was a little melancholy, and he was lost again.

But this time I really don't blame Li Ang, Jiazi also can't tell the difference between southeast and northwest, this underground world, and there is no sun, ghosts don't know how to distinguish the direction, how does Mu Mu know where is the north? By the compass?

"Mu Mu, they went over there." Yoshiko pointed in one direction.

"How do you know?" Li Ang looked at Jiazi in amazement, you have such a strong sense of direction?!

"They told me." Kako pointed to the "daughter country" on the side.

Well, you're so witty.

"Thank you, by the way, how long have they been gone?"

The "......" and "daughter countries" looked at each other one by one, and in this world where there is no day and night, they have no concept of time at all.

"Well, we're going to find our companions, goodbye." After bidding farewell to the "daughter country", Li Ang flew north with Jiazi.

The whole underground world is a whole plain, and there are not even many undulations, except for the occasional lake, large or small, hidden among the verdant forests, dotted like sapphires on the earth, which adds a little more variety to this monotonous world.

After some careful observation, Leon found that although the forest below was extremely dense, there were only a few species of trees, and the same was true for dinosaurs, the species were very limited, Leon saw a total of ten kinds of dinosaurs, among which Tyrannosaurus rex he saw a total of one, and there were not many other dinosaurs.

But there were other prehistoric creatures besides dinosaurs, such as the mountain-like mammoth, the phantom-like saber-toothed tiger that roamed through the forest, and the giant python that coiled up like a big poop but was bigger than a mammoth.

"Yoshiko, you said that there were no insects in ancient times, just like insects." This is another strange place that Leon has discovered, this underground world only has large creatures, and there are no small creatures such as bugs, which is obviously incomplete for an ecosystem.

Just when Leon had many doubts, through the dense forest in front of him, a large metal building appeared in Leon's sight.

"I'm going? This can't be a real-life version of Jurassic Park, right? ”

It's no wonder that Leon would speculate like this, the metal building is obviously not something that primitive humans like the "Daughter Country" can build, so is this built by surface humans?

However, judging from the condition of the metal building, it is obvious that it has been abandoned for a long time, and there are huge holes in many places, and there is no life in the dark holes.

After hesitating for a moment, Li Ang didn't choose to go down to find out, he came to find Mu Mu, not to decipher this underground world, or to get down to business.

"Wait a minute, honey, something seems to be attracting me down there", Yoshiko seemed to find something.

"What's that?"

"I don't know."

It didn't take much effort, Li Ang and Jiazi just landed and found a metal box that looked very tall in a corner, the box was quite strong, Li Ang couldn't open it with his bare hands, he used the blue blade to cut it open, and took out the contents inside.

It was a beautiful necklace with a platinum body and a very beautiful ornamentation, and the pendant was a heart-shaped pink gemstone, almost two centimeters wide, and it was this pink gemstone that attracted Yoshiko.

After bringing the necklace to Yoshiko, the two continued on their way, with Leon in charge of flying and Yoshiko studying the necklace.

"What's the use of this chain?" Li Ang could only feel a faint energy fluctuation on the necklace, and the strength was not very high, and it seemed to be useless.

"I feel like it's going to enhance my abilities, but I don't know how effective it will be yet."

Although the underground world is vast, it is not really boundless, and after flying forward for a while, a vertical rock wall blocks Leon's way, the rock wall connects the earth and the dome, and extends to both sides, it can be seen that the rock wall forms an arc, and I am afraid that the entire underground world is surrounded by this rock wall.

After running to the end of the world and still not finding a trace of Mu Mu, Li Ang once again played the advantage of his loud voice: "Mu ~~ Mu ~~!" ”

Li Ang suddenly felt so tired, there was no one to worry about, it was Li Tianran before, and he didn't find it after looking for a long time, but now it's Mu Mu again, no way, continue to shout: "Mu ~~ Mu ~~!" ”

"Hey! I'm here, I'm here! ”

"Huh? Mu Mu? Following the direction from which the voice came, Li Ang flew over quickly, and sure enough, he saw Mu Mu's figure on the steep rock wall, and he didn't run in vain~~ after all.

Li Ang only felt that his mood was instantly much more relaxed, and he felt a little relieved.

"What are you doing here?" When Li Ang passed, Father Yun was digging the stones on the rock wall, and when he looked down, there was a row of stone stairs on the rock wall, which sloped out along the rock wall.

"Climb the mountain." Mu Mu was also very happy to see Li Ang, after all, there are still people in this world who remember her, right?

"You're so laid-back, let's go, come back with me."

"How to go, I can't fly."

"Have you ever studied physics?"

"Huh?" Mu Mu was stunned by Li Ang's question, why did he suddenly jump to physics.

"Kong Ming lantern, do you know the principle of hot air balloons?" Li Ang looked like he hated that iron could not become steel.

“…… Uncle, I'm just a middle school student, and I'm still a girl, who would understand this! Mu Mu pouted, looking very unhappy.

"Hahaha, let's go, take you back." With Li Ang's current strength, it is still very easy for the power of the wind to fly with a few people.

It's just a question of how to go back, the dome of the underground world is a whole smooth rock, Leon didn't see any gaps in the way, not even cracks, he wasn't going to dig another hole, the dome was full of scorching magma, it was hard to say if he could get out, in case this underground world was ruined, it was not good to come here for a vacation, and there were those "daughter country" girls.

I was too lazy to explore the metal building, but now I have to take a trip, the metal building was obviously once inhabited, where did they come from?

"Huh? This is? Anyone else here? Mu Mu was also surprised when he saw the metal building.

"You haven't been here before?"

"Nope."

The group chatted and walked inside, and it didn't take much effort for Li Ang to find a floor plan of this base, and sure enough, as he expected, there was a passage to the surface, although it had been sealed by a thick metal door, but how could this ordinary metal block Li Ang, and it would be demolished for him in minutes.

At the end of the passage is a vertical upward elevator, out of the elevator is an underground base, which has also been abandoned, along the base passage to the outside, there is a field of ice and snow around, the cold wind is howling, and there are colorful distorted light bands in the sky, this is to the North Pole?

In the abandoned base of the underground world, in a closed room that was extremely dark, a miserable green light suddenly lit up, and behind a glass with ice mist, a pair of indifferent eyes suddenly opened.