Though this is already the second hug of this fairly short interaction, Lan Wangji holds onto Magnus for a very long time. He is thinking of A-Yuan in the Burial Mounds, how sickly he was and how he would have died, too, if Lan Wangji had come even a day later. He is thinking of Magnus telling him, for the first time, that he died bravely, with a weapon in his hand. It is quite a while before he manages, for the second time, to relax his hold.