- 恨海难填 hènhǎinántián unquenchable hatredA sea of hatred is hard to fill; refers to deep-seated resentment or an irreconcilable division.
- 曾经沧海难为水，除却巫山不是云 céngjīngcānghǎinánwéishuǐ, chúquè Wū Shānbùshìyún high standardsone who has seen the world or reached a high level of expertise is no longer impressed by trivialities or mediocre things