Here's a fascinating long piece on how, among other things, China is promoting revisionist views of the Great Leap forward famine as part of its general reassertion of the Party's beneficient role in modern Chinese history. The thing is that this is not your daddy's propaganda struggle, where the centre lays down the line and the rest parrots it.
Instead, as the author notes, we have something that resembles the climate change denial ramp. An eccentric amateur demographer is taken up by a fringe group. His work focuses on the least robust elements of the available dataset while ignoring the rest and is grounded in unfalsifiable assertions (in this case about urban/rural population movements). It is nevertheless laundered through official scholarship and spread by official journals as 'an important contribution to the debate' while the 'debate' itself is an artificially generated controversy. Can we really say what happened all those years ago? Who knows? Scholars differ. Et cetera.
In the CPC lexicon this is familiar as a 'two line struggle' except that here the point is not to have an outcome but to purposely generate ambiguity. For Beijing, that amounts to an incredibly light touch but I guess it just goes to show how a forward looking dictatorship can pick up tricks of the modern authoritarian trade from all over.
On which point, now that the demonstrations in Hong Kong seem to have come to a pause, I think the thing to look out for is a serious attempt by the tycoonocracy to generate Nixon style backlash politics in Hong Kong, for which there is considerable potential. The people to watch here may be the DAB.