On the first day of Yan Fei's underground traversal on Mars, everything went very smoothly. In just twenty-four hours, he advanced a thousand kilometers underground. This speed was incredible, akin to a car racing on a high-speed highway.

After reaching a depth of a thousand kilometers underground, although he still hadn't seen liquid magma, the pressure from all directions began to increase significantly, and the rocks formed by cooled magma became even harder. This made the Super Fighter Jet's underground traversal speed increasingly slow, occasionally encountering huge dangers due to geological reasons. Fortunately, the Super Fighter Jet was powerful at this time, possessing strong self-protection capabilities, and could easily overcome these challenges and continue its descent.

At the end of the second day, the Super Fighter Jet had only traversed 500 kilometers underground. Compared to the previous day's high speed, its advancing speed had decreased by a full 50%.

Before coming to Mars, Yan Fei had a complete Mars transformation plan. Everything he did was highly purposeful, and he wouldn't make any unforgivable mistakes. He had long known that the Super Fighter Jet's speed underground would gradually slow down, so he wasn't anxious; instead, he continued at his own pace, advancing at the most suitable speed toward the depths.

At the end of the third day, the Super Fighter Jet moved forward 300 kilometers; after the fourth day began, its advancement speed slowed further. By the end of the day, it had only advanced a mere 150 kilometers. In the subsequent time, the Super Fighter Jet's speed became slower and slower, traversing toward the Earth's core at a snail's pace. But Yan Fei still wasn't in a hurry; he planned to spend a month on this passage, taking a month to enter Mars' core.

A month later, Yan Fei's Super Fighter Jet finally reached a position infinitely close to Mars' core, with a distance of 3392 kilometers from the surface, only 5 kilometers from the innermost core. Upon reaching here, Yan Fei was surprised to find that the previously presumed entirely cooled rock core actually contained scorching magma. Although this magma area was just a sphere with a radius of 5 kilometers, its temperature exceeded an unprecedented one hundred thousand degrees Celsius.

Generally, the temperature at a planet's core is very high, but no planet's core is as hot as Mars', reaching as high as 100,000 degrees. Even Earth, which is much larger than Mars, has a core temperature of only 3,300 degrees Celsius. Mars' core temperature is over 30 times that of Earth's. But strangely, the high-temperature magma inside Mars' core has always been confined in a small space, without spreading its high temperature outward to remelt the already cooled magma outside.

Upon discovering high-temperature magma at the core, Yan Fei was uncertain if the previous plan could still be executed. Fortunately, Yang Qi on Earth immediately helped verify, finding that under such circumstances, their earlier Mars transformation plan would proceed even more perfectly. By continuing with the previous plan, Mars would be transformed faster than before.

After receiving Yang Qi's verification, Yan Fei dared to continue his operation of detonating the Super Hydrogen Bomb at the core. A week earlier, Yan Fei's medium Production Workshop had already produced the Super Hydrogen Bomb with an explosion yield equivalent to 100 billion tons of TNT. Now Yan Fei only had to advance another five kilometers to reach Mars' core and release the Super Hydrogen Bomb for detonation.

However, the magma ahead is at a scorching temperature of 100,000 degrees. Even with the significantly enhanced defense of the upgraded Super Fighter Jet, it cannot directly enter such scorching magma, as there's a high probability of being melted. Fortunately, the Super Fighter Jet, apart from physically withstanding, has another defense method, which is its Energy Shield.

The Super Fighter Jet's Energy Defense Shield cannot completely resist the erosion of 100,000-degree temperatures, but the erosion process is gradual. As long as the Energy Defense Shield continues to be replenished with energy during this process, the erosion by high temperature can be slowed down. If the Super Fighter Jet can reach the core before the Energy Shield is breached by the high temperature, it can deploy the Super Hydrogen Bomb into the Earth's core and successfully escape.

With the new plan in place, Yan Fei controlled the Super Fighter Jet to transform shape, switching it to the Underwater Stealth Mode more suitable for traversal in liquid. The Super Fighter Jet then activated the Energy Shield, plunging into the scorching core magma at high speed, rushing towards the core.

Under the erosion of high-temperature magma, the various capabilities of the Super Fighter Jet significantly declined, even making Yan Fei's body in space begin to feel extremely uncomfortable. Fortunately, the Drone Carrier continuously transmitted energy to the Super Fighter Jet, sustaining the Energy Shield compressed to its limit to prevent cracking and ensuring the safety of the Super Fighter Jet inside.

Though the speed of the Super Fighter Jet was suppressed to an extremely low level, the farthest distance to the destination was only 5 kilometers. The Super Fighter Jet reached the core distance of 3397 kilometers from the surface in the shortest time.

Yan Fei dared not hesitate even a bit. He quickly opened the Space channel on the Super Fighter Jet end, released the already prepared Super Hydrogen Bomb, and quickly closed the Space channel. Yet, in just that instant, more than five million tons of scorching magma flowed into the Universal Space through the Space channel. Fortunately, Yan Fei had emptied the Universal Space long ago, otherwise many items would have been destroyed by the high-temperature magma.

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