I’d rate this a solid 4,5, it’s got quite a unique concept on the apocalypse genre.
Other reviews state that the nationalism is excessive but I do not think so. The reason it appears to be so is because the whole world is facing an apocalypse that would destroy humanity, but the main character is Chinese AND a cheater. He will naturally help his home first before looking at the rest of the world. China would fare no better than others without him.
Extended synopsis of the story with minimal spoilers: The basic concept of the novel is that countless civilizations are facing endless, near guaranteed extinction events that are supposedly ”trials”. These civilizations have deemed continued survival impossible, and therefore investigated all possible loopholes in the trial system. Using these loopholes they created a ’cheat’ and sent it to the past in hopes of creating a civilization capable of ending the trials. The main character was the fortunate recipient of this cheat program, and thus the story begins.