Some translations in enlish about the drama plot, production, characters, costumes, cast etc. that I find particularly compelling to read. If you have more, feel free to ad, I follow this because of te novel Zhu Yan.
https://bunnylovereader.wordpress.com/2023/12/30/legend-of-the-hidden-sea-exclusive-report/

https://bunnylovereader.wordpress.com/2023/12/30/the-legend-of-the-hidden-sea-a-report-by-producer-chunyu-pictures/

Thanks for starting this thread. Thought to add on this for people who wish to know that this is based on Wang ZangHai, the ancestor of Wang family. Hence at the later series why they crashes with Zhang family, as they want to reveal the secret which Zhang family protects.

https://daomu-biji.fandom.com/wiki/Wang_Zanghai_(Novel)