Li Jian's experience cast a shadow over his heart.

Height: meters. Speed: Mach 2.25.

Outside the cabin, the sky was a deep, inky blue. The thin atmosphere provided almost no lift, making flight feel like walking on a razor's edge. The intense friction between the fuselage skin and the thin air began to generate high temperatures.

On the dashboard, several indicator lights representing the temperature of key components lit up in yellow as a warning.

Just then, on the monitor screen, a previously smooth curve suddenly developed an extremely fine, almost imperceptible glitch! Then, another one appeared immediately! The frequency was extremely high!

"In the silent area, sensor A7 has detected a very high frequency micro-fluctuation!"

The technician in charge of vibration monitoring exclaimed in disbelief.

Mingzhao's eyes instantly sharpened like knives. She didn't look at the screen, but directly contacted Lao Zhao: "Lao Zhao, report on the machine's condition, paying special attention to the rear of the engine compartment."

There was a moment of silence on the channel, followed by Old Zhao's voice, which was trying hard to suppress some kind of discomfort: "...Report... My right hand is gripping the stick... I feel... an extremely subtle tingling sensation in my fingertips... very slight... like... like being continuously stimulated by a very weak electric current..."

High-frequency vibrations! Although greatly weakened by the material, they were not completely eliminated!

Under extreme low temperature, low pressure and high-speed airflow disturbance, a deeper and not fully understood coupled vibration was excited!

"Maintain speed! Keep your composure!"

Mingzhao's voice remained calm, but his speech quickened, "Try fine-tuning the throttle, changing the engine speed, and looking for the vibration point shift!"