"Post-Traumatic Stress Disorder," Lan Wangji repeats, to be certain that he has it right. If Claudius has a workbook, then no doubt the library can provide him with further information later, but he can make some educated guesses based on the name. There's no need to ask what the trauma is. The thought of it stings a little, but not so sharply when paired with the sight of a relatively cheerful Claudius eating youtiao in his dressing gown. "And meditation will help you recover?"