Lan Wangji indeed went into the bathhouse and Lan Xichen had sobered up by then and was telling Jiang Cheng about his childhood. "Xichen" Lan Wangji says with a curt bow.
"Wangji" Lan Xichen nods.
"Have you seen Wei Ying?"
"He's not came to see me today if that's what you're asking" Lan Wangji stares at Jiang Cheng and little did he know that Wei Wuxian was really watching him in a comfy den like he was watching a show.
"Lan Zhan" Wei Wuxian calls like a man gasping for his last breath. That catches Lan Wangji's attention his stone cold face changes slightly before righting itself. He climbs into the den and Wei Wuxian grins, giving him a look that says 'I'm going to annoy you' and 'I want your attention' "you were looking for me? Do you need anything that you dived in here in a hurry?"