Twelve Constellations of Superpowers

In 2200 AD, with the continuous development of science and technology, superpowers gradually appeared among people. Among them, the twelve strongest superpowers were called the "Twelve Constellations of Superpowers". However, what should they do in the face of alien invasion? How should they deal with human suspicion and distrust? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.