He nods in self satisfaction. Ropes and pulleys, of course. It was making it move on its own that was the tricky bit. Maybe a talisman that could distribute the weight and offset the balance?

Anything further left his mind as Lan Zhan continued and they found his room. He watches the other man go through the motions, and hears the click as the room unlocks. It seems simple and straightforward enough.

The room that lies beyond though... Wei Wuxian's breath catches for a moment as the familiar caves of the Burial Mounds wait inside. He takes his key back, and if his hand is shaking slightly, he doesn't acknowledge it.

"Oh-" he swallows, putting on a forced smile, "I- thanks for your help, Lan Zhan. You're right, I should go rest and um- Right, I'll see you later!"

He closes the door quickly behind him, before he can change his mind.