击其不意

Explanation: Did not expect the enemy to attack under the circumstances. 　　Source: "Grandson actual situation," no pains, traveling thousands of miles, traveling in the no man's land also. "San Guowei Cao Cao out the air strike false note, keep avoiding it, hit it unexpectedly." 　　Examples: Yes, the Sejong the new reign to that big funeral Zong Xing Zhou, and Emperor of new legislation, will not send troops, should be self-will ~. ★ "a new family of Liu Zong Shi Donghan Five"