Together with Wonderful Pure, Blue Sea requested to be Profound Saint Tyrant Song’s personal guides when the later start clearing up evil pestilence in Wenzhou City with Ancient Saint Spirit Butterfly and Profound Saint Mountain of Su.
There are a few idioms that contains 沧海 (cāng hǎi) in them such as:
- 沧海桑田 (cāng hǎi sāng tián), lit. the blue sea turned into mulberry fields, fig. the transformations of the world.
- 曾经沧海 (céng jīng cāng hǎi) lit. having crossed the vast ocean, fig. widely experienced in the vicissitudes of life.
- 沧海遗珠 (cāng hǎi yí zhū) fig. undiscovered talent.
- 沧海一粟 (cāng hǎi yī sù) a drop in the ocean.