Wei Wuxian lives in Cassandra. The house that has traveled worlds with him is located in this area of Trench and is where he currently lives and works. He sells incense and teas out of the building and is constantly researching different ways to combat the various symptoms that people have to endure. Its the best way he knows how to help people in this place.

So it isn't surprising that he is wandering past the Pale Sanctuary. He has long gotten used to the appearance of the tree but he doesn't usually go inside of it. He has learned that it is often unwise to travel into certain places because the world likes to play games. And the last thing he wants is to get stuck inside some sort of blood tree. No matter if they call it a sanctuary.

But this time as he wanders past the tree there is a familiar figure studying it. He stops in his movements and observes for a time. It has been a few years since he has seen the face of Jin Guangyao. Not since that fateful night in the temple. A night that he had hoped would be the last time he would put his eyes on the man that basically turned the cultivator world upside down with the tricks that he pulled. Of course, the same could be said about himself.

"You're going to see far more interesting things then this tree while you are here."