[ He pulls the door open at the knock, pausing briefly in surprise for a moment before hastily stepping aside to gesture Lan Xichen into their rooms. It's very warm inside, thankfully, and Zishu is dressed rather more lightly than the snowscape outside would imply he should. ]

I've found that the wine is rather good when gently warmed, if is little sour. Come, sit. Warm yourself. Have some.