"They can emit a frequency of ultrasound in their mouths, which means they are constantly making sounds, but we humans cannot hear this sound, only the rats can hear it."

"This sound will reflect when it encounters an object, but it will not reflect into the ears. Their ears have dense nerves and fast reactions. After receiving ultrasound, they will transmit to the brain at an extremely fast speed, and then obtain external conditions to make a judgment on the next move."

"So, no matter how dark the room is, they shouldn't do this unless..."

"Unless what?" Xu Da asked.

Wang Qilin said: "Unless they are disturbed."

Xie Hata shook his head and said, "Not only, Master Qi, there is another possibility that they were frightened. They were so scared that they couldn't care about looking or analyzing what environment they were in, and they were only able to fly around."

"The reason they fly around is to explore the way and want to escape from here!"

As he said that, he spread his arms and waved his long sleeves and flew towards the entrance of the passage.

The Taoist robe is wide, and he is like a big bat when he flies.

After flying to the passage, he waved his arms and used the airflow to guide the bats to fly. The bats quickly followed the airflow and flew out quickly.

Xie Hama looked at Wang Qilin, his guess was correct.

Xu Da asked, "Master Qi, how to deal with it?"

Wang Qilin said, "How to do it? Go down and make it, let's go down and take a look."

It was still him who took the lead, and the three of them jumped down one by one.

From the mountain to the cave, they made a second-level jump.

There is also a hole below. This hole was dug by hand and has traces of cutting a knife and axe.

After Wang Qilin went down, he immediately raised the torch and shone it around, and then saw many bats hanging upside down on the top of the cave.

The bats gathered together in a dense manner, and they were all looking at him coldly with their faint eyes, as if they were watching a show.

He was looking at the bats. Xu Da groaned after coming down: "I'm so smelly! Is there a toilet in Daqingye Village in this ghost place? Why is it so smelly?"

Wang Qilin looked forward with concentration while saying casually: "A person like you who destroys the environment, if you find something wrong with it when you find it, you should first reflect on yourself."

"For example, is this odor related to your feet? Is this odor related to your temperament?"

The overall shape of the underground passage is not uniform, and some are square in cross-sections and some are round in some places, with obvious traces of artificial carving.

But the scale is huge, with one zhang at the widest horizontal position and one zhang at the highest position, which is a huge project for the underground world.

After Wang Qilin walked forward a few steps, he found that the terrain had changed. He illuminated the torch and found that there was a hole connected to the ground.

This new cave is relatively narrow, not even half of the cave they are now in. Moreover, its terrain is not flat and it extends downwards inclined.

It was dark and the fire was shining in and there was no sight.

"Master Qi, look!" Xie Hama, who was behind, walked up and pulled his arm and pointed at the bluestone ground under his feet.

There were clusters of black mud-like things everywhere on the bluestone floor, and a clear footprint was revealed on one of the things.

He squatted down and looked at the footprints carefully. The smell became stronger through the black mud - he understood that this was bat shit!

But how can bat shit smell? He asked Xie Hama and said, "Master Dao, Tianma Shit is also called Ye Mingsha, right? Is it a medicinal herb?"

Xie Hama said, "Not all the feces of celestial rats can be called Ye Mingsha."

The footprints on the bat shit appeared very abruptly, with no front and back, only a little here.

Wang Qilin looked back and saw that the bat shit behind was trampled into mud!

Xu Da felt disgusted when he realized what he was stepping on, so he kept rubbing against the wall.

Wang Qilin said contemptuously: "Okay, Mr. Xu, just your feet. After you step on this rat feces, it should be even more disgusting to have rat feces."

Xu Dada said angrily: "Master Qi, you are not happy if you don't scold me for a day."

"Just make a joke to adjust the atmosphere," Wang Qilin shifted the topic back, "You see, there are obviously experts here who have entered. He has a very good light body skill, so he only left a footprint here."

"Why stay here?" Xu Da's supporting role in a timely manner.

Wang Qilin pointed the torch towards the downward passage: "Because the terrain here has changed, this person should not be prepared to almost step on the air, so he stepped harder."

Xie Hata nodded and said, "That's true for the Emperor Wuliang Tianzun, then this person..."

"What kind of person? He must be Tang Ming!" said Fat May Day.

Wang Qilin said: "No matter whether it is Tang Ming or not, we will go to the right place, let's go, continue."

He held the torch and walked into the tunnel first.

This tunnel is very narrow and is carried out diagonally downward. Fortunately, it is very rough, so although Wang Qilin has to bend his waist to walk in, his feet are not smooth and he walks very steadily.

According to the place where the fire light shone, the tunnel was chiseled out on the rocks. The person who opened the cave seemed to have a bad sense of direction. He kept changing directions, which caused the tunnel to have an inclined downward section every now and then.

As we walked down, there were many large or small holes around and on the top of the tunnel.

Wang Qilin stuffed the torch in and looked in and looked at it. It was dark and deep, and there was nothing to see.

Xu Da suddenly said impatiently: "Fatty, don't always pat the old man on the back. Uncle can't walk fast, this passage is too narrow..."

Xie Haoma reacted very quickly, and a fire snake trembled his wrist and rushed over from Xu Da's crotch to illuminate him.

Behind him was a dark passage, with no one in it!

Xu Da was shocked: "Mom, Master Dao, you almost cremated a dozen babies in our Xu family! What are you doing? Why did you suddenly set fire?"

Wang Qilin said: "Master Xu, Fatty is looking at the cave on it, but he didn't come down!"

Xu Da's face froze in an instant, and he said, "No, the old man just swept back with his light and saw the fat boy!"

Xie Hama said in a deep voice: "Don't talk first, turn around!"

Xu Da tried it, but he couldn't turn around!

There is no way he is too big, he fills the tunnel with a full flow of authenticity, and he can barely move forward, but he can't do it at all if he wants to turn around.

Wang Qilin looked at Xie Hama, and Xie Hama said with a headache: "The old man should pay attention to the back. There is no way to change positions with Master Xu here, unless we all retreat."

Xu Dasheng said innately: "It's okay, just move forward. There must be some monsters and monsters at work - the uncle released the hangman and broke the back!"

After the sleep appeared, he pulled a dead face: I really thank you!

Wang Qilin moved forward faster, but the passage was very long. He was confused and didn't know how long he had been walking, but it still didn't end.

It was a very painful thing to walk in the tunnel with his body curled up. He felt uncomfortable all over and couldn't stop until he reached the ground.

In this environment, no one of the three of them was in a mood to speak. They all walked with their mouths closed, and only the sound of "kicking and stomping" footsteps echoed in the cave.

Only Xu Da complained from time to time and tried to look back.

Wang Qilin asked him what he saw, and he said he saw Diaoke.

After walking for a while, Xu Da turned back again: "Little Dianzi, have you patted the uncle on the back just now?"

The sledge looked up expressionlessly, looking too lazy to talk to him.

Of course it can't speak either.

Wang Qilin asked, "You feel someone patting your back again? Isn't this supposed to be? The slinger is right behind you - no!"

Xu Da said that someone patted him on the back. Under normal circumstances, if you want to pat someone on the back, you can only do it behind him.

But the cave was very narrow, and Xu Da had to bend down and arch his back, which led to the patting of his back that he could not be carried out behind him, but on the top of the cave!

The dick looked up and was not too lazy to communicate with them, but was telling them the problem - the top of the cave!

What's on the top of the cave?

Wang Qilin raised the torch to illuminate the top of the cave and saw the entrances one by one!

He had known this for a long time.

As he entered the entrance of the downward passage, he saw holes on the top of the cave, just like underground caves.
Chapter completed!