好景不常

Explanation: Better circumstances could not last forever. More used to things changing sigh. 　　Source: Tang Wang Bo, "Preface to King," seldom resorts, feast difficult to sustain. "Song Chao fill the" okrug that rhyming "boom often difficult, Shaohua Rujian had eyes." Thesaurus:  storm and stress, Rosy clouds Fugitive, meeting repeated difficuities, hard to fall asleep, cutter jitney, Tao fierce storms, A new wave arose when the previous one had barely subsided