The vegetation at the entrance of the cave is mainly green, with unknown weeds squeezed out from the cracks in the stones at the feet, and green vines climbing the walls extend inwards, straight into the dim black, like guiding arrows.

The further you go inward, the more you can smell the faint fragrance of grass, trees and flowers.

As the sunlight behind him fades, the color of the vines gradually turns to light blue, and scattered lavender flowers are arranged in the gaps between the stones.

Wang Jun and others made many turns and were about to take out the flashlights they had prepared in advance.

Before Li Xuanchen had time to expand the shadow space, his eyes were already attracted by the things in front of him.

After completely losing sunlight, the vegetation in the cave began to show their true appearance.

The stamens of the small purple flowers are like ring mouths, swallowing up light balls the size of fingernails. The light orange light floats and sinks, driving the darkness away one meter away.

I couldn't tell whether it was blue or green vines climbing all over the wall. The sap was filled with a faint fluorescence, penetrating the surface and vaguely illuminating the path ahead.

The four people's footsteps were light, but their walking speed was extremely fast. In just one minute, they had already walked more than 100 meters.

Wang Jun said: "We have been circling and detouring. If my body sense is correct, we are walking downwards."

"Just go down," Feng Xiao smiled brightly and snapped his fingers, "The Lost City is already underground."

Sun Buwu nodded, "My old man's aura has become stronger."

"Mr. Sun didn't take the initiative to respond to us, so there won't be any accidents, right?" Li Xuanchen was worried.

Wang Jun rolled his eyes slightly and shook his head speechlessly.

Feng Xiao raised his fists as big as sandbags, with two hands.

Walking at the front, Sun Buwu paused for a moment and raised his middle finger toward the back.

The three of them despised Li Xuanchen in their own way, and they were too lazy to pay attention to this guy's crow's mouth.

Li Xuanchen angrily covered his mouth with both hands, fearing that he would say the wrong thing again.

Most of the hair on the back of his head was gone, but he didn't want to be cut off by his friends in the cave again, ending up with "all three thousand troubles gone".

The whole journey was silent, and after a few dozen seconds of walking, a change finally appeared ahead.

The vines weave a circular arch, and the door panels are tight and cannot let in the breeze.

No gaps can be seen up, down, left, and right, and the patterns on the surface are extremely complicated, but it is difficult to tell whether they are the miraculous workmanship of nature or the exquisite carvings of human design.

In the center of the arch, there is a concave circle with a diameter of 30 centimeters, and five symbols are arranged clockwise in the inner circle of the circle.

Triangle, square, rectangle, circle, and three downward wavy lines side by side.

Pressing the palm of his right hand, nothing happened. Li Xuanchen asked, "How should I do this?"

Feng Xiao held her chin with one hand and fell into deep thought. In less than a second, her expression changed continuously.

Finally, I came to the conclusion, "Don't think so much, just punch him and see what happens next."

The right hand is clenched into a fist, gathering strength and radiance, as if plated with a layer of gold.

She took her time and stepped forward to punch, pressing the surface of her fist against the door panel.

The expected rumbling noise did not appear. The inverted arch seemed to be alive, and the door panel sunk inward, taking away most of the force.

Feng Xiao raised his eyebrows, let out a sigh, and said, "It seems that there is a special force protecting it."

"Don't act recklessly!" Sun Buwu's mouth twitched slightly, and he hurriedly grabbed Feng Xiao to prevent the humanoid tyrannosaurus from launching a violent offensive.

"Fists or blunt weapons are probably ineffective." Feng Xiao shook his waist and freed his right arm. "Perhaps you can try sharp weapons and flames."

Sun Buwu took two steps in a row, shrunk to an inch, and stood in front of Feng Xiao.

"Don't do it. We were not the first to discover this door. People from the Wilderness Temple have been here a long time ago. They must have tried various methods, but they have never been able to open it, which shows that brute force cracking is not advisable. The five in the middle of the door

It’s clear that this symbol is some kind of rune, just leave it to Ajun to decipher it.”

Feng Xiao turned around, "Wang Jun, how sure are you?"

Wang Jun said: "I have been observing for a while and I have some clues."

"The shapes of the five runes are very simple. If placed alone in other places, it would be difficult to express their original meaning."

"But the image of this wavy line is very clear, it refers to water."

"The basis is easy to find. For example, the light blue wavy lines in children's paintings are used to represent rivers or clear water."

Li Xuanchen was puzzled, "Is it that simple? Isn't it too childish?"

Wang Jun shook his head slightly, "Children's eyes have not been polluted, and it is easier to see the essence of the world. They draw like that just because they see the breeze blowing the water and the ripples on the lake."

"It seems to make sense." Li Xuanchen nodded.

Sun Buwu asked: "So, how do you solve the other four runes?"

"Let me think about it." Wang Jun finished his sentence and looked at the rune in the center of the door panel in a daze.

There are a total of 5 runes, one of which symbolizes water. The other four runes are likely to be similar things that originally exist in nature, and each thing needs to have its corresponding abstract concept.

Wang Jun thought for a moment and had a clear directional goal in his mind——

The five elements in traditional Chinese culture: metal, water, wood, fire and earth.

Wavy line: The five elements are water, symbolizing changeable intelligence, outgoing and lively, enterprising and adaptable.

Circle: The five elements are gold, symbolizing harmony and cohesion.

Square: The five elements are earth, the sky is round and the earth is round, symbolizing stability and generosity, a serious attitude towards life and orderliness.

Long bar: Five elements of wood, representing persistence, kindness, charity, and kindness.

Triangle: The five elements represent fire. Generally, objects with sharp corners can release evil spirits outwards.

"If what I expected is correct, this corresponds to the five elements..."

Wang Jun explained the knowledge he had in a simple way.

Sun Buwu seemed to have some realization in his eyes, but his brows were tightly knitted. He noticed the mystery contained in the Five Elements, but he couldn't fully understand the key. He felt like a little kitten rolling around in his heart, itching terribly.

Li Xuanchen blinked his eyes, spread out his hands, and said, "Ajun, what you said is a bit profound."

"Stupid!" Feng Xiao slapped Li Xuanchen on the back, "It doesn't matter what he probably means. What matters is that these things can be interpreted."

"It's indeed a good thing that Ajun can recognize him, but can you understand what he just said?" Li Xuanchen asked.

Feng Xiao's expression was sluggish, and he was silent for half a second before he smashed his right hand backwards.

throat!!!

The raised knuckles of his two fingers hit Li Xuanchen accurately on the forehead.

Li Xuanchen covered his forehead with both hands, his face full of grievance - no need to look too much, his forehead must be swollen and bulging.

Feng Xiao turned to look at Wang Jun as if nothing was wrong, "Now that he has recognized it, the chances of cracking it will not be too small."

Li Xuanchen rubbed his forehead and said: "Actually, we should call Mr. Cao over. He is Ajun's master. The key runes were cracked by the old man with Ajun last time. If he can be there,

That is true stability.”

"Don't make any noise, be quiet and let Ajun concentrate." Sun Buwu glared at Li Xuanchen.

The distance was close enough, and he could clearly feel the breath coming from the door. There was no mistaking it, it was definitely his grandfather.

There was no wind in the cave and the fluorescence was dim. Wang Jun raised the palm of his right hand and pressed it on the recess in the center of the door.

The aura of life was pouring in continuously, and Wang Jun consciously controlled the flow.

First light up the wave rune, and then rotate it in the order of the five elements.

Water generates wood, wood generates fire, fire generates earth, earth generates metal, and metal generates water.

A blue shimmer lights up in the upper left corner of the circle, and the runes constructed of wavy lines are sparkling, as if they have been soaked in water.

Immediately afterwards, the wooden rows and rectangular runes directly above shimmered with emerald green.

Then there are the red of fire, the dark yellow of earth, and the silver of gold.

Thumb! Thunk! Thunk! Thunk! Thunk!

The arch built by the vines undergoes special changes, and the plant fibers on the surface of the vines quickly fade away.

After years of vicissitudes, the portal shows its original material - sun and moon alloy.

Li Xuanchen exclaimed: "It works! It really works. Ajun is so powerful. Mr. Cao really doesn't need to come here."

Shaking his head slightly, Sun Buwu no longer thought about the Five Elements theory, and a hint of joy appeared on his face.

Feng Xiao couldn't wait to reach out and push the door open.

Two palms push the non-center area of ​​the door.

Bah!

A flash of fire flashed across the door panel, and raging flames emerged out of thin air.

The skin on the palm of his hand was instantly cooked, and Feng Xiao withdrew his arm as if he was getting an electric shock.

"My hands have been specially trained and protected by my abilities. They shouldn't be hurt so easily."

She expressed doubts, warned her friends, and then pulled off the cooked skin of her palm without changing her expression.
To be continued...