杳如黄鹤

Explanation: Yao groups of silence; Huang was riding the legendary fairy crane. Originally referred to the legends of fairy ride Huang Hefei go, and never come back. Are metaphors or missing without a trace. 　　Usage: Partial official; as the predicate attribute; containing derogatory 　　Source: Southern Liang Ren Kuang, "Shu Yi Ji," Jiang Xia Xun Gui open the Yellow Crane Tower, and looking down from the southwest Hon things floating in the air, is also riding a crane to the Philippines. Huan two sides of the resignation, cross Cape vacated, subtle then Ashes to Ashes. "Don Cui Hao" Yellow Crane Tower "Poetry Huang gone, clouds golden empty lengthy." 　　Examples: Yesterday, the Secretary to yet? "Or ~." ★ Lu Xun "Wandering brothers" Thesaurus:  silence, like a clay ox entering the sea, Yao no story, Yao no trace, Neither hide nor trace