Outside of the aliens' mother ship, Yao Yuan was still piloting the supermagnetic orbit cannon. He was surrounded by at least 10 Prototype 003 Space Combat Jets. All of the jets had activated their ECS system, completely shielding the cannon from view. This made sure that the mother ship wouldn’t be able to snipe the cannon with long distance targeting.
After Yao Yuan took the first cannon shot, he immediately climbed back into Red Lightning to push the supermagnetic orbit cannon out of its original position. The caution was warranted because 10 seconds later, that spot was bombarded with weapons of varying kinds. If the cannon hadn’t been moved, it would have been blown into pieces.
While Yao Yuan was moving the cannon, he activated his Anima power to order the troopers to surround the cannon, to cover its location. With the help of the ECS system, he could finally get close enough to inspect the damage done by the supermagnetic orbit cannon.