旧恨新仇

Explanation: New enemies plus the old hate. Describe the deep hatred. 　　Source: Southern Tang Feng Yansi "Cai Sangzi two" new hate word Know the old worry, head off away days. " 　　Examples: Oblique months Can Deng, half that is immortal. ~, Continuous stagnation. (Yuan Wang Shih-fu, "The West Chamber" fourth of the fourth fold)