守如处女，出如脱兔

Explanation: Virgin: unmarried women; rabbits: rabbit escape. Refers to the military action is not as discreet as the girl is not married; an action as agile as a rabbit gallop. 　　Source: "Grandson nine land" before the actual occurrence, such as virgin, the enemy opening; after such as rabbits, less than the enemy to resist. " 　　Examples: This is not the Taoist magic, it touches most sophisticated military forces of the so-called "~"," out it is not prepared, "the medication. (Qing Cao Xueqin, "Dream of Red Mansions" seventy-third back)