The book Xi Tong brought clearly recorded many past events of the Yanhuang tribe when they first migrated to this planet.
According to this book, when the Yanhuang tribe found Kunlun Star, they brought Earth’s star core to ensure the planet's environment perfectly suited the Yanhuang tribe's survival.
Now, that Earth's core lies deep within the heart of Kunlun Star, accompanying Kunlun Star's original star core.
And currently, the most suitable location on Kunlun Star's surface to travel to the planet's core is in Kunlun Province!
It is in Fengxi Valley!
There was originally a passage opened by the ancestors of the Yanhuang tribe to the planet's core. After the star core was placed, the passage was abandoned.
With billions of years of geological changes, the area around the passage gradually weathered and collapsed, its original appearance completely unrecognizable.
Only a terrifying abyss remained, and most of the Yanhuang tribe today didn't even know the origin of this abyss.
After confirming the target location, the two made an excuse about finishing their tour and left the academy.
That night, under a dark and windy sky, they quietly left the city and, following the route Xi Tong had previously scouted, made their way to Fengxi Valley!
Kunlun Star has a radius of about thirty thousand kilometers. The two, riding the Dragon Scale Sword, descended. However, at a distance of 2000 kilometers from the surface, the passage completely disappeared. What appeared before them was an endless expanse of rubble and heat continuously surging from the ground.
To proceed further, they would have to manually excavate a passage.
After installing a series of cameras around Fengxi Valley for early warning, Fang Er took out a device he had prepared long ago.
A modified ion cannon!
This device made very little noise when working, and the ion stream it emitted could disintegrate most known substances. It was no match for rocks.
The modified ion cannon had a caliber of over three meters. It consumed a large amount of Xiannv coins every minute, but this was inconsequential to Fang Er. In his spatial warehouse, he still had hundreds of millions in stock. Even if he needed to drill not just to the core but through Kunlun Star, it would be enough!
With the equipment set up and the angle adjusted, Fang Er and Xi Tong exchanged a glance and gently pressed the switch.
"Whirrrrr..."
From the thick barrel, a dazzling ion stream shot out, impacting the ground. A three-meter diameter pit instantly appeared before them and continued to extend downwards at a speed of five meters per second.
Twenty-eight thousand kilometers, or twenty-eight million meters. At this speed, it would take at least over 1500 hours!
In Earth time, that would be over two months!
"This is... a bit slow!"
Fang Er looked at the working behemoth with a disappointed frown.
When testing this thing in Great Tang, its excavation speed could exceed 50 meters per second. But here, the speed dropped by about ten times!
There was only one reason for this: Kunlun Star's mass was far greater than Earth's!
The larger the volume, the greater the internal gravity. Under these circumstances, the density of the rocks composing the celestial body was also much higher than Earth's.
To quietly drill for over fifteen hundred hours without being discovered by the Yanhuang tribe was almost an impossible task!
[I'll go outside and keep watch!]
Xi Tong had no better solution. This ion cannon was modified by her and her team, and it was already at its limit. If they further increased the power, it was likely to explode into fireworks at any moment.
Fang Er nodded helplessly.
Watching Xi Tong's retreating back, he felt somewhat displeased.
Damn it, this was their own stuff, so why did it feel like they were acting like thieves?
Days passed. When the tunnel had extended to about five thousand kilometers underground, a massive surge of magma suddenly erupted from the opening. Its speed was so fast that Fang Er didn't even have time to react!
By the time he recovered, he had been blown away by the shockwave caused by the magma eruption!
As for the ion cannon fixed at the opening, it was instantly turned into a pile of fragments!
"Bad!"
Fang Er's heart tightened. He quickly got up from the ground, stepped onto the Dragon Scale Sword, and flew towards the surface.
With such a massive disturbance, the Yanhuang tribe would definitely send people to investigate!
This surge of magma, accumulated underground for who knows how long, its terrifying pressure made it shoot towards the sky like a fiery dragon!
Xi Tong, who remained above, heard the commotion and peered down into Fengxi Valley. The next second, she retreated hundreds of meters away with a face full of horror!
Such a phenomenon was incomparable even to Mount Fuji during its fullest eruption!
As the magma rose higher and higher, the rapidly decreasing temperature caused it to cool down quickly, forming a solid rock pillar...
Like the Ruyi Jingu Bang!
Pushed higher and higher by the forceful magma...
Until it lost its balance and plummeted from a great height!
"Boom!"
The originally silent forest was struck by this immeasurably heavy rock pillar, splashing countless dead trees, dust, and fallen leaves!
"Let's go!"
Fang Er rushed out from below, grabbed Xi Tong, and they fled into the distance.
[What happened?]
Xi Tong was completely bewildered and had no idea what had happened below.
"I'll explain later, if we don't leave now, it'll be too late!"
Fang Er had no time to explain. He took Xi Tong and flew hundreds of miles away before stopping to rest. He then explained the cause and effect of the incident.
[The bottom... exploded?]
Xi Tong was stunned. Such a sudden change was something even she had not anticipated.
Neither she nor Fang Er had considered the magma accumulated underground for countless years while trying to excavate the passage as quickly as possible!
But now, the emergence of this magma had rendered all their efforts to waste!
Shortly after they left, dozens of spacecraft flew rapidly from Kunlun City. It was clear that the Yanhuang tribe had noticed the disturbance here!
"Investigate! We must find out exactly what happened!"
"Reporting, Commander. Traces of deliberate destruction have been found beneath Fengxi Valley!"
"What? Immediately dispatch personnel from headquarters. Search the heavens and the earth to find the culprits who destroyed Fengxi Valley. Otherwise, if King Kun blames us, neither of us can bear the responsibility!"
"Yes!"