[Oh hey, Trevor is asking questions. Which luckily, Jun is more than willing to explain now that he's been asked]

Mm. Jueyun Karst is the home of the adepti, a type of immortal spiritual being that have protected Liyue for thousands of years. While some adepti choose to live among humans, the ones who reside out here prefer peace and solitude. That's why humans normally aren't allowed to come here, at least without permission. Trespassing here can be...fatal.

[He'll dig into pockets, pulling out a sigil and showing it to Trevor]

I was given this the last time I was allowed to visit. Let's pray it's still in effect. Though...we should probably stay clear of any adepti, regardless.