I'm in a High Martial World, So What Do You Mean the Whole Class Are Fakes?

[High-martial world + leveling up + ruthless decisiveness + impostor containment + stat allocation] Lu Chen wakes up transmigrated to a high-martial world and awakens a stat-allocation System. But can someone tell me why the hell there are impostors in a high-martial world? Teachers and classmates could all be impostors in disguise. In this world where everyone lives in fear, Lu Chen is surprised to discover that his System can see through their disguises, and that killing impostors earns him a huge amount of experience. When Lu Chen realizes every student in his class is an impostor, only one thought remains: kill them until the whole world is turned upside down!