如入无人之境

Explanation: Habitat: place. As to the place where no one. Metaphor of war victorious met no resistance. 　　Usage: Verb-object type; as the predicate clause; described the battle brave, no one dared to stop 　　Source: "Old Five Du Wei Chuan Han History": "Every Diji over hundreds of millions of Han Chinese flooding the city, if unhindered, Chung-wei, but the board parapet attention, a little taken without profound meaning." 　　Examples: A car speeding on the highway in broad, flat, really ~.