An year of seclusion
"I'll help," Bai Ling spoke with a sigh as he agreed and Tang An looked to be both glad and relieved as he heard this, "However, I can't say how long it would take. If she's really at her death bed, as you say, it might take me a few years to completely treat her."
"That's fine," Tang An responded without needing to think about it too much, "As long as you can treat her, it doesn't matter how long you take."
Bai Ling nodded in understanding as he heard this and his lips slightly curled up into a small almost unnoticeable smile, "The time is not the only problem."
"Hmm?"
"Currently, I am in a bind and the sky sect isn't exactly supporting me."
"..."
"Since she's from the Maple passion pavilion, I am not legally allowed to cure her so I'll need to work in secret, and in the Sky sect, it would be hard to keep her hidden for the next few years."