风云突变

Explanation: FY: metaphor volatile situation changes. The situation suddenly changed. 　　Usage: The main predicate; as predicate, object, adverbial; that Council and other 　　Source: Mao Zedong, "Jiang Qingping Le Gui war" word: "drastic changes, warlord heavy fighting. Spread worldwide and is resentment, a daydream reproduction." 　　Examples: ~, Warlord heavy war. (Mao Zedong, "Jiang Qingping Le Gui war" words) Thesaurus:  Infinite mystery, change constantly, Infinite variety, be most changeful, fantasticality, vagary, vary contingency, make still further progress, change constantly like cloud and wave, lubricity, vagrancy, diversity, ebb and flow contingency, ebb and flow boundless, obliterate, sudden change of a situation, Changing situation, Yunjuefenggui, Ghost out of power into, Ghost out empathic, Ten of nine changes, give oneself a shake and change into another form, Hey presto!, chop and `change keep changing one's plans, opinions, etc