"The core principle of the aura-powered mecha lies in the aura engine." He pointed to the core area of ​​the mecha's chest and said slowly, "This is the heart of the entire mecha. The efficiency of the aura's circulation directly determines the mecha's operating speed, agility, and even combat effectiveness."

He casually manipulated the cockpit's aura control panel, a complex series of buttons and sliders moving smoothly in his hands. With a soft click, the mech's arm slowly rose, and a silver sword emerged from its arm armor, slicing through the air with a flash of aura, like the dawn, dazzling and sharp.

"This is the coordination of basic sword moves. Even a basic mecha can unleash considerable power as long as the spiritual energy is properly circulated." He said calmly.

As the mecha master demonstrated, the mecha's movements were smooth and precise, and the path of the sword light through the air was clearly visible, as if carving a spiritual rune in the air. A low exclamation echoed throughout the classroom.

Xiang Fan's breathing quickened slightly. He stared at the mecha on the podium, his gaze fixed on it, as if drawn in by some force. His fingers scribbled rapidly on his notebook, the tip of his pen nearly tearing the paper.

"The path of spiritual energy flow... the coordination of the core and controls... the button layout..." He wrote, imagining the controls with his fingers under his desk, as if completely immersed in the mecha. He tried to capture every detail of the mecha operator, from the order of finger presses to the subtle changes in spiritual energy on the mecha's patterns, not wanting to miss anything.

After the course, the students left the classroom in groups of three or four. As they walked, they enthusiastically discussed what they had learned that day, their faces full of excitement.

Xiang Fan remained in his seat, motionless. His gaze remained fixed on the stationary basic mecha on the podium, a complex mix of emotions swirling within him. He clenched his fists, his palms slightly sweating from the intense tension.

"The real feeling... is completely different from the virtual device." He whispered, as if summarizing, or expressing emotion.

Back in the cabin, he almost couldn't wait to pull out his virtual device. He carefully opened the aura engine model and re-adjusted its parameters, striving to make every detail more closely aligned with what he had learned in class. He then pulled out the "Mecha Operation Manual" and, as he flipped through it, he wrote and drew on paper, simulating different ways of aura flow.

"If the parameters here are adjusted during today's operation... the efficiency of the spiritual energy engine should be improved a bit." He muttered to himself at a rapid pace, his expression full of concentration.

Under the dim light of the spirit stone lamp in the room, his figure cast a long shadow on the wall. His passion and desire for mecha made him completely forget the passage of time, and the pen in his hand even left some marks on the paper from excessive force.

"This is a real mecha..." He gently closed the book in his hand, a new light in his eyes, "In the next class, I must try to control it."

As the night deepened, the wind from the bamboo forest blew past the window, bringing with it the chirping of insects. His world, however, contained only the dark silver mecha and his endless anticipation for the future.