You,
The matter with your Senior Uncle Xie has been settled for now, and Xueqing/Wenzhou has already informed me of your decision to leave the mountain alone. Given all that has happened, your choice is understandable. I do worry for you, but I respect your decision.
Even so, you must not take the Gu Poison lightly. If your condition worsens and you cannot find a skilled doctor, return to Sanqing Mountain at once. Do not be careless. Do not act on impulse. Remember this well!
You couldn't practice our sect's martial arts due to your unique constitution, but studied from the scrolls of Isle of Fallen Deities/Valiant Camp/Baidi City/Herbal Valley we kept. Still, the essence of each style lies within its own teachings. You may visit the schools and further refine your martial skills under their guidance. I've enclosed a greeting card with this letter. Bring it with you when you go.
Now that you've left the mountain, you're part of the martial world. It's a long road ahead. Do look after yourself.