- 碧海青天 bìhǎiqīngtiān emerald sea and blue sky(idiom) green sea under the blue sky; describes the vast expanse where the water and sky merge into a single shade of blue; also used to describe the profound loneliness of a woman whose partner is away
- 海青天 hǎiqīngtiān Hai the JustNickname of [[海瑞|海瑞|hai3 rui4]], a Ming Dynasty politician famous for his honesty and integrity.