仇人相见，分外眼明

Explanation: Means that when the two sides meet, when hostile to each other on the other side are especially alert and sensitive. 　　Source: Ming Shi Nai "Water Margin" 68 back: "Yan Qing brought the Napi miles Jin Chi, Path to Dazhai. SUNG looked ecstatic, enemies meet, exceptionally clear eyes." 　　Examples: One day, Yuanjialuzhai, which a garrison ... ... in the street shouting 'Japan Car'. Was he saw, really ~. "★" two decades have witnessed the strange status quo, "the 10th back