If you have seen Tomb of the sea, it happens 10 years after this...and in the story ZQL live in seclusion in mountain..but…
if i'm not wrong, I think you made a mistake, according to https://www.jaynestars.com/news/zhu-yilong-garners-praises-in-reunion-the-sound-of-providence/ tomb of the sea takes place before reunion , as it describes how wuxie was forced to change with xiaoge not being by his side and also in reunion wuxie has the scars he got in tomb of the sea that proves tomb of the sea happened before reunion.
https://www.jaynestars.com/news/zhu-yilong-garners-praises-in-reunion-the-sound-of-providence/
tomb of the sea takes place before reunion , as it describes how wuxie was forced to change with xiaoge not being by his side and also in reunion wuxie has the scars he got in tomb of the sea that proves tomb of the sea happened before reunion.