Science Fiction: Obtain the God-Killing Mecha at the Beginning

When he woke up, Wen Cheng traveled to the earth ten thousand years later. At this time, the earth is being invaded by alien civilization. At the critical moment of life and death, Wencheng awakens the galaxy system. One person and one mecha are blocking the invasion on the planet. System: Select the mecha level! Wencheng: SSS level god-killer! System: Do you want to use it if you obtain one billion energy stones? Wencheng: Donated! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.