得失相半

Explanation: Refers to the pros and cons exist, equal, nearly equal. 　　Source: Jin Chenshou "Three Kingdoms Chung-Chuan Wu Shu-quan," this divide our forces arrest people, gains and losses relative to a half, Qide that all zai? " 　　Examples: Actually nobody knows what, I still do not if the fortress of ~ also. ★ Song Yueke "Huan Shi Stone City Fort"