You can go to China and see it for yourself. The USSR made itself inaccessible to foreigners for the most part, but you can hop on a train and visit nearly any place in China freely. It's pretty easy with their extensive train system.

I see a lot of cope with "c-China is lying! It's not really that good!" But lots of tourists such as myself have been all over the country, and tbh, I think the "propaganda" undersells it a bit. I thought there was no way it could be as nice as the travel videos I saw, but it was even better.