Can't speak to everything, but I remember reading about special schools and workplaces for (I think) autistic people. Places where the person's individual strengths and sensitivities are respected and where the people are able to really thrive. It could have been something like a restaurant and a workshop with caretakers and maybe even parents present.
I'll try to remember to find the article when I have time.
China is often demonized for treating their mentally ill harshly (in the West), but from reading your post, China seems way more progressive than a society like America.
I imagine it may depend on the area. China's a big, varied, ever-changing place.
gotta love the accusations of cruelty from the country that lobotomized the president's sister one time to keep her in line
Huh? I know jfk's sister was lobotomized but to keep her in line? What was she doing?
I can't really find any sources on exactly WHY she was lobotomized other than that she was "difficult" to handle and was "irritable" (with no clear anecdotes to demonstrate this), and that the doctors promised (as many did at that time for all kinds of mental illnesses) the lobotomy as a general "cure". The sources I found describe her as being essentially disabled post-lobotomy, needing assistance just to get dressed.
This explains physically disabled treatment in china. https://www.prisoncensorship.info/archive/etext/classics/lifeundermao/deaf1.pdf https://en.m.wikipedia.org/wiki/Disability_in_China
This one is about the USSR but still relevant. https://isreview.org/issue/103/disability-and-soviet-union-advances-and-retreats/index.html
but to answer your question communism is based on "From each according to his ability to each according to his need." so as long as the material conditions allow for it mentally disabled should be treated well. https://www.scribd.com/document/256390020/Disability-Studies-a-Historical-Materialist-View