I gonna say for the YCP, since eit is the route I have the better grasp on it.What would a realistic Qing China look like through the fifties and sixties?
At this time it would be similar to cold war era fastly developing nations such as South Korea, singapore, Brazil. It wouldn't laugh on the arrival of technology, but it would laugh on the distribution of technology (so like, while the average American will have a TV on the late 40s, the average Qing might only get one on the late 50s or easily 60s). There will be specialists alerting how China will be a superpower on the future (way earlier than OTL due no Mao), living standards would be increasing as wealthy inequality. Dissent would have been mostly out down since the warlords have been crushed and pacified.
Maybe on the 1980s China can get to the status they have today, as a strong world power capable of investing everywhere and competing with America. The Aisin Gioro would be the richest family on earth.