藏器待时

Explanation: Device: equipment, extension of the order. Analogy learn the skills, waiting for the opportunity to display. 　　Usage: Partial official; as predicate, attributive; metaphor pregnant before waiting for an opportunity 　　Source: "Book of copulative": "a gentleman hidden device in the body, until the occasion." 　　Examples: Lee as true to the book, April 26, Huang, has been known brother home, ~, favorite favorite. (Ming Li Zhi, "continued burning of the books and focus weak Hou")