观衅伺隙

Explanation: Blood in sacrifice, gap: flaw, vulnerability. Detectors each other's flaws, vulnerabilities, pending the time. 　　Source: "Three Kingdoms Wu Shu-Chuan Lu Xun" and stop all non-military, ancient Ming-Jian, Cheng Yi respite small-scale enterprise to build People's Idea of ​​the power and watch blood in sacrifice Sixi, Shu-Hui Lin-free. "