[重整旗鼓, chóng zhěng qí gǔㄔㄨㄥˊ ㄓㄥˇ ㄑㄧˊ ㄍㄨˇ] lit. to reorganize flags and drums (成语 saw); to regroup after a setback; to prepare for new initiatives; to attempt a comeback#58501
[因祸得福 / 因禍得福, yīn huò dé fúㄧㄣ ㄏㄨㄛˋ ㄉㄜˊ ㄈㄨˊ] to profit from a disaster (成语 saw); some good comes out of a setback; It's an ill wind that blows nobody any good.#58646
[安史之乱 / 安史之亂, Ān Shǐ zhī luànㄢ ㄕˇ ㄓ ㄌㄨㄢˋ] An Shi rebellion (755-763) of An Lushan 安禄山 and Shi Siming 史思明, a catastrophic setback for Tang dynasty, See Also: 安禄山, 史思明#72401