What appeared in front of Chen Qing and Sister Beauty was a wide cave, but the cave had traces of human reinforcement with concrete and masonry, and it was about the size of a basketball court.

Around the cave, there are all kinds of old instruments, whether mechanical, or utensils, or glass jars, and the whole place is like an experimental research base.

However, this base has been around for a long time, and all kinds of instruments are covered with dust, and many appliances and machinery have been broken, as if they have been broken for a long time, and they seem to have been smashed open.

On the side, the entire wall, is a huge glass box with a height of four or five meters in length, width and height, which is full of water, which is a super large fish tank.

Three black pythons were swimming inside, and found Chen Qing and Sister Beauty, and came over inside.

Chen Qing raised his eyes and was about to make a move, when the three black pythons seemed to have a sense, and immediately jumped into a pipe on the side, and then disappeared.

At a glance, Chen Qing knew that this water pipe led into the underground river outside.

These three black pythons came out of the corpse of the black snake dragon, at that time, one of the seven, was killed by Chen Qing at a glance, one was killed underwater, and the giant ape Da Hei also killed two, and finally these three were left, and they actually came to this big tank together, and now they were scared away by Chen Qing.

Chen Qing looked at the surrounding laboratory bases, and a thought moved in his heart.

Could it be that this big water tank, which looks like an experimental pool, is like an old nest for the black python, so after encountering danger, instinctively return here?

"Here...... What kind of place is it? Underground? It's such a base. Sister Beauty was a little surprised.

"It seems like it's been around for some years. ”

Chen Qing and Sister Beauty walked down together, came to the base, and looked at it curiously.

From left to right, looking at the experimental tables, there is an experimental pool on the side of each experimental table, which is not enough to be the size of a bathtub.

The first one is empty, there is nothing in it.

"It's ...... Snake?" Sister Pretty looked at the second experimental pool, and there was a snake curled up in it, coiled in a plate, but it had dried up and shrunk, and became a pile of shriveled dry bones.

In the third experimental pool, there was only a dry snake molting in it.

Fourthly, fifthly, all the way back, there are corpses of snakes, but they are not the same.

Chen Qing looked at it, and suddenly his pupils shrank.

When it came to the snake corpse in the back, it had faintly broken through the appearance limit of snakes.

A snake actually had a horn sticking out of the top of its head, very short and small, but it did exist.

A snake actually has two heads, and its tail is forked.

A snake actually gave birth to two legs under its body, but one large and one small, which was seriously unbalanced.

There are several tiny snake bones under a snake, as if a pregnant snake has died, but the snake is oviparous......

After that, there was basically no shape to be seen, only a pile of broken bones.

Chen Qing's brows furrowed when he saw it, and after looking at the experimental pools, he felt more and more that there was a biological transformation experiment carried out in this experimental base.

The snake bones in each experimental pool are different, as if different experiments are being conducted.

And the last experimental pool......

Chen Qing looked in the direction and finally saw the huge experimental pool where the three black pythons appeared before......

Don't......

The final result of the experiment here is this Black Snake Divine Dragon!

The Black Snake Divine Dragon is not born, it is not mutated, but artificially researched!

It's just that in the end, I don't know what happened, the entire experimental base was abandoned and stopped, but in the end, the research results, the Black Snake Divine Dragon survived!

Or is it that when this place was abandoned, the Black Snake Divine Dragon had not yet been successfully studied, and after everyone withdrew, the spiritual energy poured in, which promoted the birth of the Black Snake Divine Dragon?

In just a moment, all kinds of conjectures and thoughts flashed through Chen Qing's heart.

When I looked at the surrounding experimental bases, I couldn't help but be curious.

When was it in the beginning, what kind of group of people, in this underground, built such a secret experimental base, for what purpose, only the Black Snake Divine Dragon, why did they give up in the end?

All of this has been buried in the ashes of history, only the original one is still in the imagination, or the black snake dragon beyond the imagination is still alive, but not long ago, it was beheaded by Chen Qing's sword.

"It's been abandoned for at least fifty years. Sister Pretty looked around.

"We dug the wall and came in, not the door, the door was here. Sister Pretty looked to the other side, where a metal door was being closed.

Chen Qing walked over and stretched out his hand to push, but the door did not move.

It's not because the gate is metal, it's not because it's rusty.

Outside this door, it's blocked by something!

Chen Qing used his immortal qi and suddenly exerted his strength.

"Click-la-la-......"

A screeching sound rang out one after another, and the metal gate moved.

As soon as the crack in the door opened, stones rolled down from the crack.

Chen Qing kicked it away, and with both hands again, he completely pushed the metal door open, and then his body shook, shaking all the stones that rolled in.

Chen Qing walked out with Sister Beauty, only to see that there was also a cave outside, narrow but not wide, maybe only here was widened.

The cave is very long, and only by the light inside the experimental base can you see a section of the doorway, and in the distance, it is pitch black.

The metal gate was filled with stones, and when you looked up, you could see that it had collapsed from above.

Was this something that was blown up with dynamite in the first place?

The rest completely blocked the metal gates?

Chen Qing guessed in his heart.

"It's ...... Rails?"

Sister Pretty kicked the gravel off the ground, stepped on it, and then exclaimed.

Chen Qing also fixed his eyes, and sure enough, on this ground, there was actually a railroad track, which followed the cave and extended into the darkness in the distance.

"There must be a way out! Sister Beauty said happily.

As she spoke, she stomped the railroad tracks underground.

"Knock Knock ......"

The trills of the rails, in the dark cavern, echoed far away.

Chen Qing raised his eyebrows and pressed down on Sister Beauty.

"Shh......h

"What's wrong?"

Sister Lady listened in surprise, and then saw Chen Qing staring at the end of the cave, so she turned her head over, and then saw an extremely incredible scene.

"Bang, clang, clang......"

The constant sound of a minecart running on the railroad tracks came louder and louder......

Sister Pretty was so frightened that she was nervous, in this underground cave, there was still a minecart running?

What will be the one that is about to drive through the darkness?

Finally, at the end of the darkness, a little dark shadow gradually emerged, and then slowly expanded.

It was an empty minecart, no one pushed it, as if it was going downhill, slowly sliding to this side, and the lonely "clang" sound resounded throughout the darkness again and again.

Sister Pretty was already so frightened that she hid behind Chen Qing, clinging to the corners of Chen Qing's clothes, only daring to show her head and watch from afar.

The minecart is getting closer and closer, and the speed is very slow, as if someone has designed the slope of the rails so that when the minecart rolls on its own, it will just stop at the metal gate.

Chen Qing also locked his eyes on the minecart, and the immortal qi in his body rotated, preventing accidents at any time.

Especially inside the minecart, you can't see from here whether there is really nothing inside, or maybe something is really lying inside, and it is not known.

When the minecart finally approached, Chen Qing breathed a sigh of relief.

In his perception, the minecart was indeed empty.

But just when he breathed a sigh of relief, a black shadow suddenly jumped in the minecart.

This black shadow had evaded Chen Qing's perception before!

"Who!"

Chen Qing reacted very quickly, hugged Sister Beauty with one hand and quickly retreated, and raised directly with the other, pointing at the black shadow!

One finger is empty!

But after flicking his fingers, the black shadow did not react, and even his body trembled, and he was not hindered at all.

He completely ignored Chen Qing and rushed towards the metal gate, slapping it with one palm.

Chen Qing's heart was slightly angry, he opened his mouth and spit out, condensing his qi into a sword, the sword light was blue, and it brought out a wonderful arc in the darkness, and slashed towards the black shadow.

This move, the black shadow can't ignore it, otherwise it will be cut off by a sword like the black snake dragon.

Chen Qing stared at the black shadow, ready to take it down in one fell swoop while he was defending, and ask about the specific situation here.

However, the cyan sword light slashed through the black shadow's neck, and the blade could even be seen from the back of the neck.

Sharpen your head with a sword!

However, the shadow did not die!

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