In parallel time and space, the countries of Blue Star are selected by the "Supreme God Realm" and start a round of "civilization trials" every ten years. Each country randomly selects a number of "Chosen Ones" to enter the alien battlefield to survive, develop, and fight in a doomsday environment. The results of the test directly determine the country's national destiny in the next ten years - resources, technology, economy, population growth rate... The winner will have a prosperous national destiny, while the loser will be doomed.
