Chapter 1802: Disturb sound waves

Chen Yang, Yu Ziwen, Jiang Wentao, and Yan Guinan all took the Long Wu boat to reach the mountain range three hundred miles south of Futu River, and they stopped.
This mountain range looks very ordinary, and feng shui is also very general. Except for some ordinary people living on the edge of the mountain range, the mountains are uninhabited.
Most people would never want to be there. In the mountains, there is an ancient tomb hidden.
The four of Chen Yang flew down from the Longwu ship, flew low in the mountains, and hurried toward the entrance of the ancient tomb.
Ke Zeyi's hand-drawn map clearly marks the geographical location.
But even so, they found two hours before they found the entrance.
Four people parked in front of a big tree with a diameter of 78 meters. The big tree is more than 50 meters high and grows leafy. I do n’t know how many years there are. Not sure.
At the bottom of the tree, there is a tree hole, about two meters wide and two meters high.
The hole in the tree was dark, and the inner wall of the big tree could be seen faintly.
According to Ke Zezhen's hand-drawn map, this tree hole is the entrance to the ancient tomb.
Although the tree hole looks ordinary, you can enter the ancient tomb just by walking in.
Just then, a fat squirrel drilled out of the tree hole and looked at the four of Chen Yang, and flew into the jungle.
Although it was fleeting, all four of Chen Yang felt that the squirrel had a decaying atmosphere, apparently in a closed underground space and stayed for a long time.
"Let's go."
As the leader, Yan Guinan entered the tree cave first.
I saw him, gradually faded, and finally disappeared.
Jiang Wentao glanced at Chen Yang, and the second went into the tree hole.
Chen Yang and Yu Ziwen also went in.
After entering the tree cave, the sight in front of them changed instantaneously. The four were in the cave, located on the edge of a cliff, in front of the abyss, and opposite to 50 meters away was a huge palace with a plaque above the door , But there is no word above.
Yan Guinan glanced towards the abyss, and shot a finger into the abyss.
"Hmm ..."
That infuriating sounded like a horse's honeycomb. Under the abyss, there was a sharp sound, very harsh.
Immediately after, a bat-like monster flew up from the abyss, and the number reached at least two thousand.
However, these bats are not powerful, they are just red claw bats in the late period of Dandan.
The four Chen Yang shot one after another, and quickly cleared these red claw bats, leaving a small number of deserted and fled, and returned to the abyss.
"This first level is too easy."
Jiang Wentao put away his sword and looked at Chen Yang. It seemed to be ridiculing that the obstacle set by Chen Yang's ancestors was too low-end.
Yan Guinan glanced at Jiang Wentao and Shen said, "The appearance of red-clawed bats is often accompanied by the red-clawed bat king. Don't take it lightly."
Jiang Wentao dismissed it: "The Red Claw Bat King is just an extraordinary fourfold monster, which can't threaten us at all, so why bother?"
Yan Guinan's eyes flashed with dissatisfaction, but he explained patiently: "Every ten red-clawed bats may be led by a red-clawed bat king. That is, there may be hundreds of red-clawed bat kings. Appears below. "
Hearing this, Jiang Wentao changed his color slightly.
Although hundreds of Red Claw Bat Kings will not kill them, they can cause a lot of trouble.
And if a careless one is dragged down the abyss, there is a dark piece underneath, and it is not yet known what kind of crisis is hidden in the end.
Suddenly, the sound of wings flapping from the abyss sounded like a tornado.
Immediately afterwards, more than 200 red talons with huge stature were seen flying off the abyss.
These red-clawed bat kings didn't make the slightest sound, but the fierce demon spirit shrouded the abyss over the abyss.
More than two hundred red-clawed bat kings attacked at the same time, and the momentum was quite scary.
Jiang Wentao, Ke Zeyi, and Yu Ziwen immediately shot and attacked Red Claw Bat King.
They are too high, often killing one with one sword.
But they found that Chen Yang stood in place and didn't do it. Instead, he took out a strange machine from the ring, and he was tinkering there.
"Chen Yang, what are you doing yet?"
Jiang Wentao turned dark and roared towards Chen Yang.
His voice had just fallen, and suddenly, the fierce red claw bat king seemed as if he was crazy. He no longer attacked Yu Ziwen and others, but flew wildly and ran into each other. ,
They are extremely fast and often suffer minor injuries when they collide.
For a time, blood splattered in the air, and successive impacts caused the Red Claw Bat King to die more than half.
The remaining red claw bat kings, like headless flies, stumbled towards the abyss.
When I saw the last Red Claw Bat King, he slammed on the cliff of the abyss, and then he fell into the abyss. .
When the scene completely calms down ~ EbookFREE.me ~ Yan Guinan groans: "These red claw bat kings seem to have been disturbed and lost control of the flight direction."
He looked at Chen Yang, turned his eyes, and landed on the machine beside Chen Yang, thoughtfully, and asked, "Brother Chen, did you do that?"
Chen Yang nodded and smiled: "Brother Yan, smart."
Hearing the words, Yan Guinan, Yu Ziwen, and Jiang Wentao all showed unexpected colors.
Chen Yang didn't move, so he got over two hundred red claw bat kings. This method was incredible.
Yu Ziwen stepped forward and asked, "Chen Yang, how did you do that?"
"Red Claw Bat King, although it is a monster, but he is still a type of bat. Bats fly, relying on sound reflections to determine direction, distance, and location."
Chen Yang pointed to the machine next to him, and then said, "This is an ultrasonic emitter. After I opened it just now, the ultrasonic wave disrupted the sound waves of Red Claw Bat King. They received the wrong reflected sound waves, so they lost control. "
This explains that the three people, Ziwen, who has never been biological or physical, can hear the clouds and fog.
Jiang Wentao came back to him and said coldly, "Chen Yang, don't brag. What kind of ultrasound and reflections have we never heard of? What is your theory?"
Yan Guinan was puzzled and asked, "Brother Chen, where did you get the ultrasonic transmitter? I'm so ignorant, I have never heard of it before."
Chen Yangdao: "I brought the ultrasonic transmitter from Diwuxing. At that time, I just moved some instruments and placed them in the ring. I did not expect that it would come in handy today."
After hearing the words, Yan Guinan raised his eyebrows and said, "Di Wuxing, listening to the advanced technology there, but the cultivation is very backward. Brother Chen, are you Di Wuxing?"
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