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Mount Dan Sect.
"Are you returning to the Chengshan Realm?"
Upon hearing her disciple's words, Qi Shiyun's pretty face showed surprise, then she thought of something and her eyes flicked up, "Is there someone in the Chengshan Realm you can't bear to part with?"
The cultivation environment in the Lower Realms simply can't compare to that of the Middle Realms.
A cultivator from the Lower Realms wanting to return to the Middle Realms usually means one thing: there is someone in the Lower Realms they can't let go of, or perhaps they're not doing well in the Middle Realms, have become disillusioned, and want to return to the Lower Realms.
However, it's a rule in the Middle Realms that cultivators from the Middle Realms cannot stay in the Lower Realms indefinitely without a reason.