以半击倍

Explanation: With half of the troops have the enemy on the break twice. Describe the easy win. 　　Source: "Tube sub-system of" personnel in turmoil, with ten Pobai; control equipment not to hit a half times. "Yin enemy control equipment known chapter Note, not implemented; Therefore, although half the times he can hit." 　　Examples: Will not princes, monarch, and not, ditch barrier minors, the ban is not applied, the Tri-Hungary and Hungary, the former does not want to, want to dare, ~, know yourself. ★ "Wu Liaodi"