Accompanying them was a staff member from the research institute named Xiao Sun, who told them the story of each cave as they walked.

The group listened with rapt attention.

They soon arrived at Cave 158.

This is the most distinctive Nirvana Cave, which is rectangular in shape and resembles a coffin, making it extremely unique.

Inside, there is a Nirvana altar that is over one meter high, on which the Buddha lies. The south, north, and east walls are all covered with murals depicting the solemn scene before the Buddha's Nirvana. The ceiling of the cave is painted with thousands of Buddhas, which are rich in style and very spectacular.

Nirvana Cave was built in 755 AD with funding from prominent local families in Dunhuang.

The group began to tour the cave, and one of the senior disciples even took out a piece of paper to sketch portraits.

Luo Yunhang and Xiang Tianhong took out their cameras and snapped a few pictures.

When they came from Tianzhou City, they specially bought a camera and prepared a lot of film.

The two even taught themselves how to develop photos.

When Luo Yunhang photographed a mural on the cave wall, he felt something was off. This mural seemed different from the ones next to it. He couldn't quite put his finger on what was strange, but it just felt a bit illogical.

This is also thanks to his strong appreciation ability and discerning eye.

“Brother Xiang, look at this mural. It seems a little different from the ones next to it.” Luo Yunhang patted Xiang Tianhong on the shoulder.

Xiang Tianhong turned on his powerful flashlight, peered at it, shook his head, and said, somewhat puzzled, "I can't quite put my finger on it. It feels a bit strange, but it doesn't seem to be any different. Maybe they changed artists at the last minute when they were drawing it, so the style is slightly different?"

Even Xiang Tianhong couldn't tell the difference.

Their strange behavior quickly attracted Master Li's attention, and he slowly walked over.

Luo Yunhang still felt something was wrong with this mural, so he stubbornly used his X-ray vision to look at it.

Passing through the stone, the scene before Luo Yunhang startled him.

The stone skin in front of us was actually glued on with a special kind of glue. The stone skin, which was about one meter high and one and a half meters wide, was entirely glued on.

However, as far as he knew, the research institute did not have such glue, and they would not use this method to forcibly create a fake stone skin to stick on.

There is clearly a big problem here.

Out of caution, he still asked Xiao Sun, "Brother Sun, has this mural ever fallen off completely before?"

Xiao Sun was very familiar with the restoration status of these caves, and shook his head: "No, the murals in this cave are still quite well preserved, only some of the faded murals have been touched up."

Xiang Tianhong nodded thoughtfully: "That's it. Yunhang and I felt that this mural was a little different from the ones next to it, but we couldn't quite put our finger on why."

It seems that some minor stylistic differences arose when colors were added to the murals afterward, resulting in variations from the original artwork.

Luo Yunhang said with certainty, "No, this is not just a few minor stylistic differences. Brother Sun, I think we may need to ask Dean Duan to come over. I can confirm that this mural has been completely replaced."

In other words, someone peeled off the entire stone, and what everyone sees now is just a fake, imitation.

Upon hearing this, everyone was startled.

Xiang Tianhong quickly tugged at Luo Yunhang's arm, signaling him not to speak recklessly without evidence. This was no small matter; it would be embarrassing if he made a mistake.

Xiao Sun was immediately startled: "No way! I don't see any difference!"

Master Li did not immediately refute the mural, but instead stood in front of it and began to observe it seriously.

Others were also whispering among themselves.

"It's precisely because there's no difference that it's so terrifying! It shows that this forger's methods have reached their peak, making the fake indistinguishable from the real thing. They even fooled the staff at the research institute. Over the years, they replaced all the real items in the grotto with fakes."

Brother Sun, believe me, I don't speak without reason. My calligraphy is quite good, and my appreciation is not bad either. This mural is definitely not just a little bit different from the ones next to it.

"If you're afraid of making a mistake and becoming a laughingstock, I'll take full responsibility. Just tell Dean Duan and the others to come over," Luo Yunhang solemnly reminded him.

Xiao Sun knew all too well how formidable this young man was; it was precisely because he knew how powerful he was that he was both terrified and frightened.

If he really comes true, then all the work their research institute has done over the years will become a joke, their own territory will become a den of thieves, and they will watch helplessly as others take away their valuable possessions without even realizing it.

While Xiao Sun hesitated, Master Li decisively turned around and said, "Xiao Sun, go ahead and call Lao Duan over. I'll take care of any problems."

Upon hearing Master Li's words, Xiao Sun completely panicked and scrambled downstairs.

"Yunhang, how did you figure that out?" Master Li's words indicated that he also saw the problem and affirmed Luo Yunhang's statement.

For a moment, everyone looked around in bewilderment.

Hearing Master Li say this, Xiang Tianhong breathed a sigh of relief, but then became nervous again.

They breathed a sigh of relief because Luo Yunhang wouldn't have to bear any responsibility. What made them nervous was how these murals could have been replaced. There must be more to it than met the eye. Revealing this now at this critical juncture gave them a feeling that a storm was brewing and the building was about to collapse.

Of course, Luo Yunhang couldn't claim that he had X-ray vision and could tell that the stone skin was glued on.

He could only launch into a long list of his professional judgments on the murals, pointing out the differences in style between this mural and the murals next to it.

"Based on these judgments alone, you dare to conclude that it has been replaced? What if it hasn't?" Master Li looked at him with great interest.

"If it's not true, at worst I'll just be blamed by everyone and lose face. But if it is true, we can find out the source, prevent the loss of cultural relics, and protect more murals and cultural relics. It's all worth it," Luo Yunhang said nonchalantly.

Master Li patted him on the shoulder: "Good lad! You have vision and courage. Let's face this together today!"

Master Li doesn't have X-ray vision and doesn't know the truth beneath the stone's surface, but based on his years of experience working with cultural relics, he feels that this mural does indeed have significant problems.

Therefore, he felt that regardless of whether it was true or false, he had to check it out before he could feel at ease.

Soon, Dean Duan and his group were summoned by Xiao Sun. It was because Luo Yunhang's statement was so unbelievable that Duan Jie was startled and rushed over with his people without stopping.