Xiang Kun was flipping through the PDF version of the DSM-5 diagnostic and statistical manual of mental disorders. Even though he had almost memorized it after his previous readings, being able to refer to the original text directly would aid his thought process and judgments immensely.
However, having gone through it, Xiang Kun still couldn't pinpoint which disorder Xia Libing might fall under. From his past interactions and observations of her behaviours, the vast majority of the disorders don't seem to fit.
Not enjoying socialising or preferring solitude isn't necessarily symptomatic of autism. Autism Spectrum Disorder has numerous degrees, all with notably different manifestations. It's not that those with autism don't "like" socialzing, rather they "can't" engage properly in a normal social interaction.
