As always, Wei Wuxian and Lan Wangji continue to not get along. If that wasn't enough trouble for them, some corpses escape confinement at a time when both are without their weapons and within the corpses' line of sight.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.