刀山火海

Explanation: Analogy is extremely dangerous and difficult places. 　　Usage: Joint type; as subject, object; with a compliment, that fearless 　　Source: Henkel Security World Translation "Buddha asked the head even by a ghost": "my life has come, or registration ordered by the sword tree hell, or falling into the fire pit ..." 　　Examples: At the moment, even sideways in front of ~, we must fight in the past. (Liu, "a thousand miles leap Dabie Mountains") Thesaurus:  Trees ordered by the sword, Sword Tree Cutter Mountain, bluff, most dangerous places, Cliff Juebi