Let me just tell you the most redeeming thing about this drama first- the leads. I only exclusively watch BL or danmei adaptations because, reasons and this is something I would highly recommend.
The story is very very different from the source material which is both good and bad. The priest novel is so complicated especially for people who are not familiar with Chinese mythology. Here they attempted to simplify it but ended up loosing a lot due to sloppy writing.

One of the main characters, Shen Wei is adorable and sweet and very mild mannered while the other, Zhao yunlan is crude, brazen and yet brings in an effortless charm and they are just perfect for each other. A lot toned down obviously but enough present as far as a c-drama is concerned.
The music overall is okay, some might like the OST some might not.

The production value is low and it shows, the cgi, props, set etc are not good. A lot of scenes feel illogical even with its fantacy setting.

The acting is okay-ish, some side character performances were okay while others were just plain cringe. The leads did a pretty decent job especially the actor who played Shen wei.

The thing is despite the negatives the drama is worth watching if you like BLs.