三十年河东，三十年河西

Explanation: Thirty years ago the east of the river, Feng Shui, and three years later, but the river west. Metaphor things change, checkered. 　　Source: Qing Wu Jingzi "Scholars" Forty-sixth back: "Mr. Big, 'three decades east, west three years'! Like thirty years ago, how you two advantages of your family, I saw it . "