I've never heard of the 'Manchurian communes' and neither has wikipedia...
I think they might be referring to these:
https://en.wikipedia.org/wiki/Korean_People%27s_Association_in_Manchuria https://theanarchistlibrary.org/library/francesco-dalessandro-the-forgotten-anarchist-commune-in-manchuria
I don't have enough intimate knowledge to be able to comment though, apart from my natural suspicion that once again, as usual, the anarchists will paint their lack of political efficacy as moral virtue and communist nefariousness, though I'm happy to be corrected.
Then why are you masochistically staying here as if you do?