Extraterrestrial Civilization

[Starry sky + technology + machinery + civilization + war + strategy + espionage + love] In 2389 AD, the earth has been unified into one country, science and technology are highly developed, and interstellar immigration is very mature. However, there are civilizations outside of civilization. How can human civilization find survival opportunities among advanced civilizations and declining civilizations? When human civilization encounters danger, how should astronaut Shen Jian, who lost his parents since childhood, save human civilization... (No more updates!)