"The first unsolved mystery is: During this period, there were strong men who went in and out of the Bilmark Empire test site many times, and even killed the Bull-Headed Mechanical King inside. But the strange thing is that within a year or two, various strong and strange monsters appeared in the Bilmark Empire test site one after another, and even the Bull-Headed Mechanical King was reborn. You know, this is a monster with a degree of transformation of more than 70% of its body, and it is absolutely impossible for it to reproduce naturally... This is the first doubt raised by people, that is, why the monsters here can never be eliminated."

"Another unsolved mystery is that, over the long years, there has been a steady stream of people pouring into this dangerous yet rich place, risking their lives in exchange for the rare Terra Stones. Although most of these people have failed, there are always lucky ones who can achieve their goals. After a long period of accumulation, the number of Terra Stones taken away from the Bilmark Test Site should have accumulated to a very astonishing number. However, the number of Terra Stones taken out of the Bilmark Empire Test Site every year is almost stable, and there has never been a reduction in production!"

Du Yuqi listened to Meimei's words attentively, his brows gradually furrowed. These two unsolved mysteries seemed to have nothing to do with their current trip, but if one thinks more deeply, they might be hiding a huge secret, as well as astonishing benefits!

Every time at this time, he whispered:

"It's normal for a senior awakened warrior to be interested in the interests of the Bilmark Empire's test field. However, it's abnormal for a senior awakened warrior and a second awakened warrior to join forces and enter here."

"Because for the Second Awakening masters, their strength has been tempered to the extreme. The strength gained from ruins like the Imperial Test Site is completely useless to them. For the Second Awakening masters, if they want to make progress in strength, it is more important to have a spiritual breakthrough and self-realization. External forces are almost useless."

Hearing this, Du Yuqi's expression became even more serious:

"So what do you mean? Someone must have discovered some incredible secret in the Bilmark Empire's test field, which is why so many powerful people have gathered here. Although we don't know this secret, it should be the answer to one of the two unsolved mysteries!"

Every time he sighed, he nodded:

"It is very likely so."

Du Yuqi couldn't help but frown at this moment. How could there be such a coincidence in the world? He and his group were going to go deep into the Bilmark Empire test site, and they happened to meet several senior strong men who joined forces to explore this place. When he thought of this, he couldn't help but have a weird feeling in his heart. He looked at Duize deeply. If such a thing was said to be a coincidence, then it would be a bit too much, right?

Du Yuqi believed that Duize had no ulterior motives, but the problem was that Duize was now in the state of a chess piece being driven by others, so he had to think carefully.

At this time, Xi probably felt wary and came to Du Yuqi and whispered:

"It seems that something extraordinary has happened in the Imperial Test Field. Strong men have gathered here. From what we can see dozens of kilometers away, we can already tell that there is a senior Hell Blood Devil God and a second awakening strongman, the Emperor of Heaven. What's more, there are others that we haven't seen?"

After hearing Xi's words, Du Yuqi's heart trembled. What Xi said was very likely true. At this time, they could only confirm that there were two powerful people who took action in the imperial test field, but what about those who did not take action? Or the movement of taking action was not so loud that it was not easy to be discovered?

After thinking for a while, he repeated to Xi what he had said before, especially the two unsolved mysteries about the Imperial Test Site, and then said:

"Have you heard about this? Teacher, you must have had a very exciting life. You must have been involved in the Imperial Proving Grounds, a place where opportunities and dangers coexist?"

Xi pondered for a moment, frowned and said:

"If you hadn't mentioned it, I would have forgotten it... but now I remembered one thing. Although the teacher has never been to the Bilmark Empire Test Site, a good friend of mine has been there four times. I'm not in a position to mention this senior's name, but he also has a strong fighting power that can make him a second awakening warrior at any time. At that time, because he lacked a suitable weapon, he repeatedly entered the Bilmark Empire Test Site to collect Terra Stones, hoping to create a powerful Terra Stone weapon."

"However, after he entered the Bilmark Proving Ground for the last time, he refused to enter again even though he was still short of a dozen Terra Stones. He could get the Terra Stone weapons he dreamed of by making two more trips, but he spent all his money to buy them on the market. As a result, he waited for five years before getting the weapons he wanted! And because of this, he missed the best chance to defeat his lifelong enemy!"

"Even seven or eight years later, a very powerful person heard about his experience of going to the Bilmark test site four times and offered him a high price to lead the way there. He even threatened him that if he didn't go, he would destroy his dojo and foundation. However, this powerful person chose to flee overnight."

Du Yuqi listened to Xi's words and felt that there was indeed a huge secret hidden in the Bilmark Test Site. He pondered and said:

"Then what?"

Evening Road:

"He visited the dojo once. I had hit a bottleneck in my leg training at that time, so when the teacher and he were drinking at night, he asked me to serve him sobering tea and asked him for some pointers. He was a little drunk that time. After teaching me, he exchanged moves with the teacher and seemed to be quite moved. He then said that although the teacher's mind energy was used to perfection, in the face of absolute power, it was probably still like a beautiful soap bubble..."

Hearing this, Du Yuqi couldn't help but raise the corners of his mouth and smiled slightly. He had seen the old man Feng Lin before. He was extremely arrogant. His best thing was described as "beautiful soap bubbles". Even if he didn't say it on the surface, he must be very angry in his heart and he had to get an explanation from him.

As a result, Xidao said:

"The teacher would definitely ask for a reasonable explanation, but at this time I was busy digesting what he had taught me before, so... I packed up the dishes and left. But when I left, I heard a sentence - that cow is not that simple. Why doesn't anyone know how terrible it is? Because everyone who knows is dead. I was lucky to leave alive. It has more than one body!!"

Xi's words made Du Yuqi fall into deep thought again. At this moment, he felt that his thoughts were like a tangled mess. There were too many clues, but he couldn't find the end of the thread at all. Considering that he had to move forward tomorrow, he could only frown and go back into the cave to sleep.

…

When Du Yuqi fell into a deep sleep, Lin had already woken up.

This sleep drove away 80% of Lin's fatigue. After he washed his face with the ice water beside him and ate eight plum rice balls and two roasted chickens, he felt refreshed and full of strength again.

During his sleep, Lin's injuries were healing at an accelerated pace. Some of his skin injuries had already formed blood scabs, and the bruises on his body had also faded a lot. At this time, he should be in the belly of Yuelun Mountain, where there are dense stalagmites, dripping water droplets, and humid air.

Lin retracted the automatic early warning system deployed around him from the circular track and looked at the rock wall ahead. The road ahead was steep and rugged, and he could vaguely see a towering mountain wall in front of him, at least several hundred meters high, blocking his way like a giant fan. This meant that Lin had to climb hundreds of meters high underground rock wall in the dark with his bare hands.

Even for the tyrannical Lin, such behavior was extremely dangerous, because no one could tell what kind of threats were hidden behind the darkness. It would not be surprising if a giant dragon's head stretched out from there and spit fire at him.

Therefore, when climbing forward, Lin was very cautious and focused most of his energy on looking around to see if there was anything unusual. In this vast and dark mountain, Lin was as small as a moth flying into a flame. When he was halfway up, his fingers suddenly felt something wrong.