In the book, when Wei Ying and Lan Zhan meet up again, Lan Zhan is like, "It's been two hours! How have you gotten into this much trouble?" And promptly princess carried him to the hotel room.
Also, if you watch the scene again where he's carrying him on his back, Wei Ying has to hide his face because he was laughing too hard and couldn't stop, so the director finally took the scene where he was laughing the least.
