神出鬼没

Explanation: Out: there; not: away. Like the ghost that haunted impermanence. Described as haunted uncertain, unpredictable. Refers to action after the change rapidly. 　　Usage: Joint type; as predicate, adverbial, attributive; with compliment 　　Source: Han Liu, "Huainanzi Binglue training": "The move is also good people, God out of the ghost line." 　　Examples: ~ Anti-Japanese guerrillas, playing the Japanese devils wits. 　　Results: Land Lord hide and seek; land lords to take evil 　　Postscript: Land Lord hide and seek; land lords to take evil 　　Riddle: Zhong Kui demon sword cut Thesaurus:  Haunted impermanence, Surreptitious Unpredictable, Marvelous and unpredictable