"Hm." Wangji grumbles. "It is not bias if it is true." He can tell his brother's heart is not in it though.

"Perhaps when you return, it will not have been long and there will not be the adverse effects you fear." They can hope at least, Xichen deserves a break.

At the question of his own home, Wangji hums, drinking his tea and coming to rest next to where Xichen is. This would be an interesting explanation.
"Much as you did, I returned to Cloud recesses in one of our lecture halls. I fear you would struggle to recognize it were you to visit."