Since the nearby area had already been declared a no-fly zone, Cloud Ascend broke the sound barrier at an altitude of less than 10,000 meters, and the entire city could hear the tremendous disturbance from above, followed by a white contrail that kept stretching out.
The extreme supersonic aerodynamic design allowed Cloud Ascend to accelerate very quickly, so much so that the accompanying J-20B had to engage its afterburners just to keep up, unable to take many pictures.
However, this only lasted for less than three minutes. Once Cloud Ascend reached an altitude above 25,000 meters, it began to inject its own oxygen into the turbine pump, ensuring the engine's turbofan portion continued to operate at maximum efficiency while also cooling powerfully. The thrust did not fade at all despite the increasing altitude.
