Lan Wangji is busy trying to figure out what he's supposed to do next.
This seems like some kind of nightmare. If it is, it's a longer and more detailed one than his usual nightmares. He can't will himself awake, so he might as well treat it as real until he can wake up or until that no longer seems like the best option. That means behaving properly, so that he can make whatever changes need to happen happen without getting obstructed. Wei Ying is... missing? Lan Wangji can't trust that Wen Ruohan will also be missing. He needs information. What changes are there from what he remembers? Most importantly: Where is Wei Ying?
Voice still flat, "The punishment for attacking without provocation, plus my other transgressions this last night, should come to 350 strikes. You are both needed to attend the Salutation Ceremony later today. Please arrange for a suitable replacement to oversee my punishment in your place."