桑田沧海

Explanation: Mulberry: farmland. The sea into a mulberry, mulberry into the sea. Metaphor things changed dramatically. 　　Source: Jin Ge Hong's "fairy Biography Magu" Magu from that cloud, since reception, see the East China Sea have been three for mulberry. " 　　Examples: ~ Any worse, he was not surprised since no surprise. (Ming Wu Cheng-en, "Journey to the West," the seventh back)