Southern Province, Moon Mountain.
Fang Er, as usual, inspected the mine and returned to their hiding place with Xi Tong.
"Anything wrong?"
Xi Tong handed him a lamb leg, roasted to a golden brown and glistening with oil, and asked casually.
"Nothing, everything..."
Fang Er took the lamb leg, but before he could finish, he pinned Xi Tong to the ground.
In the distant sky, a dense army of the Yanhuang tribe was rapidly approaching, causing his heart to sink to the bottom.
"Damn it, why is there an army here!"
He lowered his voice and cursed hatefully.
This time, the excavation had proceeded without any unexpected incidents. Even a kilometer away from the mine, they couldn't detect any activity there.
Therefore, he couldn't understand why an army would come to such a desolate place!
"Perhaps, we overlooked something."
Xi Tong's brows were also tightly furrowed.
Despite the vast amount of data they had to reference, the technological gap with the Yanhuang tribe still made it impossible for them to fully comprehend the Yanhuang tribe's methods.
These people had appeared too suddenly, making it impossible to determine if they were passing by chance or had a specific purpose.
But the answer to this question came quickly!
The Yanhuang tribe's army, in an instant, surrounded the mine where the ion cannons were placed, and a small team rushed inside.
"Withdraw!"
Fang Er didn't dare to hesitate. He pulled Xi Tong and fled deeper into the mine where they were hiding.
The ion cannons were placed opposite them. Once discovered by those people, a large-scale search would surely commence.
They absolutely could not be caught!
Otherwise, everything would be over!
The mines left behind from mining moonstones were like a maze, with tunnels extending in all directions.
The two weaved their way downwards for thousands of meters before arriving at a spacious cavern within the mountain.
This cavern was not formed by mining moonstones, but rather seemed to be a natural formation.
When the excavation began in the opposite mine that morning, Fang Er and Xi Tong had already discovered this place and made secondary preparations here.
Here, another ion cannon was also in operation!
When the ion cannon was stopped and the ion flow disappeared, the excavated opening was revealed.
It was three meters in diameter and had already reached a depth of about twenty thousand meters.
Without hesitation, the two leaped inside and, stepping on the Dragon Scale Greatsword, slowly descended into the dark opening.
Upon reaching a depth of about fifteen thousand meters, they controlled the Dragon Scale Sword to stop. At their current location, there was another horizontal opening.
For the first excavation, and perhaps the last chance, Fang Er and Xi Tong had never intended to escape from the beginning!
Instead, they drew inspiration from a game on Earth, "Minecraft"...
Excavate, advance, block the tunnel behind them, and then change direction to continue excavating.
Although this slowed down their progress considerably, it increased their safety by more than tenfold!
The only thing to note was that they had to constantly monitor the surrounding environment's temperature. Otherwise, they might accidentally send themselves into a lava pool!
The couple, like moles digging in the earth, slowly moved closer to the center of the planet.
Meanwhile, the Yanhuang tribe's army outside had begun a carpet-like search within a ten-kilometer radius, and the cave where Fang Er and Xi Tong had been hiding was quickly exposed.
"Reporting to the captain, this is where the criminals were previously hiding. Judging by the traces, it should be two people, one male, one female!"
A soldier pointed at the mine and reported to his captain.
Although the mine was empty, with not even a piece of trash visible, it could not escape the scanning instruments.
Fingerprints and skin flakes were secondary.
The key was that on the smooth stone walls, there were also clusters of splattered marks, seemingly left by some dried liquid.
The captain stepped forward a few paces, reached out, touched the marks, sniffed them vigorously under his nose, and his expression turned grim.
"Slap!"
He casually slapped the soldier across the face.
"Find them!"
"Dig three feet deep, you must find these two dogs and bitches!"
"Alive or dead, I don't care!"
"Yes!"
The surrounding soldiers immediately began searching deeper into the mine along the tunnel.
The captain, meanwhile, picked up his communicator to report the discovery to his superior.
"General, I suspect the criminals may be from another planet!"
"How are you sure?"
"The criminals' excrement contains a large amount of substances from outside Kunlun Star!"
"Understood, continue the search!"
"Yes!"
Although there were many branches in the mine, the Yanhuang tribe's soldiers were even more numerous!
As they continued to delve deeper, more and more traces left by Fang Er were discovered, until they disappeared at a pile of rocks.
"Dig this place open!"
The captain, having received the news, rushed over and quickly formed a guess, pointing at the rocks and giving the order.
The soldiers rushed forward, and after clearing away the rocks, a three-meter-diameter hole appeared before them.
After careful consideration, the captain ordered again: "Seal off a ten-kilometer radius, spare no effort to find the criminals!"
"Additionally, mobilize equipment and dig out this hole for me. I want to see what they are trying to do by digging this deep pit!"
At this time, Fang Er and Xi Tong had already descended to a depth of nearly thirty thousand meters underground. The surroundings had become dark and humid, and large amounts of water occasionally gushed out from the opened tunnel.
However, the presence of water flow was precisely what Fang Er was most pleased to see, as it meant he could safely proceed deeper.
However, the process was too monotonous, so monotonous that if Xi Tong weren't by his side, Fang Er worried he might develop claustrophobia.
Whenever they noticed a change in the surrounding environment, such as an increase in the temperature of the water seeping from the cave walls, or the stone walls that were previously seeping water suddenly becoming dry, they would immediately retreat a short distance and adjust their posture...
Or rather, adjust their direction and continue...
In the dark underground, day and night were indistinguishable. When they were tired, they would stop, and when they woke up, they would continue.
As for oxygen, there was no need to worry in this environment. They could openly take out oxygen tanks to breathe, even saving the need for oxygen jelly.
It wasn't until they had gone about eight thousand kilometers underground that Xi Tong's expression suddenly turned serious.
"What's wrong?" Fang Er's heart tightened, and he quickly asked.
"The ion cannon has lost contact. I'm going to check!"
Their current location was at a turn in the tunnel. After speaking, Xi Tong jumped down directly.
"Let's go together!"
Fearing something might happen, Fang Er dared not delay and also jumped into the vertical tunnel with Xi Tong.