The space behind the slate is devoid of any light and is in a state of absolute darkness. Xia Lei's left eye can see in the dark, but the lack of light in the underground environment also affects his ability. He could see about twenty meters away, and only inside the stone tunnel.

There was nothing in the slate tunnel, the ground, the sides and the top were exactly the same slates, bare slabs, no carved reliefs. Every few meters away, an oil lamp appears on the two walls of the stone tunnel, holding a Pashtun-style duckbill oil lamp, like Aladdin's magic lamp in "One Thousand and One Nights".

Those oil lamps are antiquities from hundreds of years ago or more than a thousand years ago, and they are covered with patina, and obviously will not be lit again.

Unable to see the situation further away, Xia Lei ended the perspective, he reached out and pushed the stone slab in front of him, but the stone slab was solidified with triple soil, which was very stable and could not be pushed at all. Xia Lei reversed back, took the impact drill, and used the impact drill to make a few holes in the cracks of the stone slab, destroying its stability, and then pushing it hard. This time he knocked the slab down, revealing an entrance big enough for him to get into.

Xia Lei didn't get into it immediately, but tested the air inside with a lighter. The flame of the lighter was normal, and there was a slight tremor, which was obviously due to the movement of air.

"Is there a vent?" Xia Lei's heart was full of curiosity. There was no problem with the air, and he burrowed into the stone tunnel. Inside, he straightened his backpack and walked deeper down the stone tunnel.

Although he could see twenty meters away in the dark environment, Xia Lei did not make a big deal and used the tactical flashlight provided by the 101st round. In this completely devoid of light, the Tactical Flashlight could "see" farther away than his left eye, and he was happy to rest it.

Tap, tap, ......

Xia Lei's footsteps echoed through the stone tunnel, as if many people were walking. From time to time, a strange shadow appears in the light range of the tactical flashlight, like a demon lurking in the shadows. In short, even if you are as bold as a cow, you will be creepy in such an environment.

The slate tunnel does not extend horizontally and horizontally, but diagonally downward. Xia Lei counted his steps, and did not see the end until a thousand steps. At 1,400 steps, this slate tunnel is 700 meters long! Although it is not a vertical height, it is not difficult to calculate according to the inclination of the slate tunnel that its end is 100 meters deep underground!

Seven hundred meters long and a drop of 100 meters, this is nothing on the ground, but it is a huge project underground. It's hard to imagine how people built this underground world hundreds of years ago.

At the end of the tunnel is a thick stone gate, two meters high and one meter five wide, weighing at least a few tons.

Xia Lei glanced at the compass in his hand, the needle of the compass pointed straight to the stone gate, and the frequency of trembling was strong.

"What you're looking for must be behind the stone gate. Xia Lei's heart was excited, and he walked towards the stone gate.

There is a relief on the stone door, which is a woman in ancient costume. The carving is exquisite, and the women in ancient costumes are lifelike, graceful, and beautiful, as if they will come out of the stone slabs at any time.

There are also two Chinese characters carved above the stone gate: 美塚.

Xia Lei said secretly in his heart: "塚 means grave in Chinese, Meizuka, is it the tomb of Princess Ningmei? If so, then the woman in ancient costume in front of her is probably Princess Ningmei Zhu Xuanyue." ”

There were no locks on the stone doors, and there were no mechanisms or anything. Xia Lei observed carefully, and then leaned in front of the stone gate, awakening the perspective ability of his left eye and seeing through the situation behind the stone gate.

The thickness of the stone gate was about a foot, and the material was also ordinary stone, so with his current ability, he could easily see through the past. However, a strange thing happened, the back of the stone gate seemed to be coated with a layer of black glue, and when his vision just penetrated the stone gate, it was "glued", as if he was stuck in a quagmire, and it was very difficult to move forward at all, and the energy consumed was also very huge.

What's going on?

Xia Lei was secretly surprised in his heart, and then ended the perspective.

From the time he mastered the ability of perspective to the present, Kazui encountered this situation for the first time.

"Who's going to glue behind the door of the tomb?" said Charleigh.

Unable to see through, unable to open, Xia Lei had to use extreme means. He removed his backpack and retrieved the blasting device that Bureau 101 had airdropped to him. It is the most advanced adhesive blasting device available. He taped the four blasting units to the gaps in the four corners of the stone door, then stepped away and activated the explosive device.

There was a muffled thud, and the huge stone door fell to the ground with a bang.

At the moment when the stone gate fell, a creaking sound suddenly came from the darkness. Then, suddenly, a large black thing rushed towards him from behind the stone door.

"That's ...... Bat!" Xia Lei's back was numb, and he fell to the ground with his head in his hands.

But the bats didn't let him go, and in the blink of an eye they surrounded him. Lying on the ground, he clearly felt the bats gnawing and scratching his clothes, and the exposed skin became the target of the bats, those bats were biting his flesh and sucking his blood!

In a panic, Xia Lei grabbed a fuel canister from his backpack and sprayed liquid fuel on his body and the bats flying wildly. Subsequently, he lit the lighter. Boom! A flash of fire burst out of his body, and a large swarm of bats was set on fire, along with his clothes. The bats were afraid of fire, and the sudden fire immediately frightened the bats, regardless of whether the ignited bats fled in a hurry.

Xia Lei quickly took off his burning clothes and put out the fire on the ground. His clothes had been burned with holes, but he could barely wear them. In this catacomb, the defense of an extra layer of clothing is also very important.

More than a dozen bats fell from the ground, and they were still on fire, screaming and struggling. Charleigh's gaze fell on a bat, and he was shocked to find that the bats here were different from those he had ever seen. They are twice as large as ordinary bats, and they are all black, but they have a ring of white bat hair on their heads, which looks like a halo, which is very weird.

Xia Lei's gaze moved to the stone door again, and the back of the stone door that fell to the ground was upward, but there was no black glue on it, exactly the same as the stone on the front. His heart was full of surprise, "Could it be that these bats were just stuck to the stone door and blocked my view?

Xia Lei's gaze shifted to a dead bat again, and the clairvoyance of his left eye was immediately awakened, but he was shocked that his clairvoyance could not penetrate the bat. The batsuit on its body seems to have the ability not to be seen through, and his see-through vision is "glued" after touching the batsuit, just like what happened just now.

There is something strange about this place.

Xia Lei picked up the tactical flashlight that had fallen to the ground and threw the beam into the dark space behind the stone gate. The darkness was dispelled, and an oval-shaped burial chamber came into his sight, several hundred square meters, and surprisingly large.

In the lighting place, there are exquisite stone carvings, war horse terracotta figurines, as well as antique cultural relics such as weapons and porcelain. In the middle of the burial chamber was a white jade coffin, which had been silent for a long time, but the light was faintly shining, and there was not much dust on it.

Xia Lei stood at the stone doorway and sniffed with his nose, to his surprise that there was no smell of decay in the tomb, and the air in the tomb was the same as the air in the tunnel. The ventilation here is very good, but he knows that now he has not found out where the vents are designed.

Xia Lei stepped on the stone door and walked inside, his feet stepping on the first stone brick.

Suddenly, there was a sound of breaking through the air, and a dozen crossbow bolts flew from the side walls. In a hurry, Xia Lei lay on his back on the ground and rolled backwards. As soon as he dodged, the bolts landed on the stone slab he had just stepped on, and sparks flew everywhere!

Xia Lei was shocked into a cold sweat, first a strange bat that sucked blood and ate meat, and now it is a secret weapon for killing, this place is full of dangers, and if you don't pay attention to it, you will die here!

This time Xia Lei didn't dare to be careless, he got up, awakened the ability of his left eye to look directly at the ground. He soon discovered that the floor of the burial chamber was not simple, and that most of the stone bricks had mechanisms underneath. Some of the stone bricks are even ten meters deep under the traps, and the traps are full of iron chisel and iron thorns, and the gods can't save them if they fall!

However, there are normal slates, but there is only the ground underneath, and there are no mechanisms. Charlei quickly found a safe route, and his foot tentatively stepped on a normal stone slab. No crossbows or any other traps were activated.

Xia Lei took a deep breath, then stepped over two stone slabs with traps and jumped onto another safe stone slab. This time, too, nothing dangerous happened.

Such a burial chamber, if Xia Lei did not have the ability to see, he would have to come in with a safe map. Otherwise, it won't take a few steps and it's over. As for ordinary tomb robbers, don't even think about it.

Xia Lei quickly moved to the center near the jade coffin.

The stone carvings placed around the jade coffin are all stone carvings of Ming Dynasty soldiers, and the weapons and armor are all in the style of the Ming Dynasty. The statues of these Ming Dynasty soldiers are life-size figures, and they all have cold expressions and are not angry and arrogant. Being stared at by them, as if being stared at by the undead, it feels really weird.

Xia Lei jumped towards the jade coffin, and the needle of the compass in his hand fluttered more frequently. Faintly, the inside of the compass also emitted a buzzing sound similar to the flight of bees, very faint, but still clearly audible in this absolutely quiet environment.

Could it be that the thing you are looking for is in that jade coffin?

Xia Lei leaped forward, stepped over the last two stone slabs with traps, and came to the jade coffin.

There is a white marble stone platform at the head of the jade coffin, and there is a jade spirit card on the stone platform, and the spirit card is carved with "the spirit seat of the Yongmei princess of the Ming Dynasty".

Sure enough, it is the grave of Princess Yongmei.

Xia Lei approached the jade coffin, and the clairvoyance of his left eye awakened, and his vision penetrated into it......