"Mm," Lan Wangji answers, taking Wei Ying's thin wrist and checking his meridians before aiming a steady stream of qi in the correct place. So much of it is wasted without a core but Lan Wangji's magic is strong and he will give all he has to keep Wei Ying safe.

"Wei Ying must try and cough," he insists, bracing his free hand against Wei Ying's chest. "Cannot risk chill settling in the lungs. Cough and then you can rest."