Matches aren’t automatically reported to authorities. They first go to Apple, and a match on an absurdly non-CSAM picture will be noticed. If it passes through, it will be reported as a tip to the NCMEC, which will also evaluate the pictures; and only then can it be forwarded to the government.
This is many steps removed from the current situation, which is that the feature rolls out in the US and photo hashes are provided by the NCMEC. Please describe how you think the system would work in China.
