But Li hadn't been diagnosed with schizophrenia had he? I thought Canada would be one of the "best" countries to live in if one is to fall ill, mentally or otherwise. If Li does have schizophrenia then surely he must have had the condition for quite a while since onset is late teens/early adulthood, I can't imagine someone behaving erratically for so many years without having been referred to psychiatric resources at some point...
Onset after age 40 is very rare but not unheard of. I think it's more likely that while Li was in China, he was able to compensate for his illness and was probably able to act fairly normal. When he went to Canada, he went to a completely different culture, with different norms and expectations. Those are very difficult things for people with normal mental health to deal with, let alone someone with a serious mental illness.
His boss said that Li was occasionally frustrated with himself when he couldn't communicate on the job. Considering he was working at MacDonalds and doing newspaper delivery, the level of language required would be more about concrete things, rather than emotional or abstract concepts.
I'm not sure that the Chinese have the same concept of mental illness as we do here in the US and Canada. I don't know enough about Chinese culture--do they rely on psychiatrists/psychologists for mental health care or do people usually turn to their families or their church? If they do use psychiatry/psychology extensively, how is it accessed?
And then, in Canada, even if he had been referred to psychiatric resources, would they speak his form of Chinese? I just don't see any way for someone who can't always communicate about concrete tasks on the job being able to describe abstract concepts or complex emotions. If he had someone to translate for him, would that inhibit him from talking about what was going on in his head?
I feel so sad for his victim but I also feel sad for Li. Life can be so hard even for people with no mental illnesses to cope with, I can't imagine stacking mental illness and culture shock on top of it.