I think that only applies to middle class chinese with formal resident permits. Migrant workers from the villages, which make up much of that 12 million, still have to leave their kids at home. Anyways, shanghai is a bad example of equitable education.
School enrollment is permitted for those with temporary resident registration (which most everyone should qualify) but requires three year continuous registration, so is still a high bar to cross. Hope to see continued relaxation. They will need the younger generation to fill the schools as fertility rate stays low.
