I wouldn’t have a problem with any actually democratic country being a superpower since I’ve always lived in a democratic superpower. Though it’s flawed and not the greatest, it sure as Hell would beat growing up in an authoritarian superpower.

As for the things listed, I wouldn’t mind the whole Chinese becoming the defacto world language considering I could probably learn it and if not, translation tools are better than ever before in most cases. I wouldn’t mind Chinese Hollywood so long as they were making quality animated films (which is way more than possible for them currently, just look at films like Legend of Hei and Big Fish and Begonia). Fengshui as a spiritual practice I can’t get behind personally, but have no problems with.

Got no complaints about where UN headquarters would be moved to in this hypothetical so long as it’s not an authoritarian country. I don’t mind Lunar New Year becoming a major holiday since it’s fairly harmless as a concept (just don’t go blowing yourself up with firecrackers somehow). So long as the safety and privacy measures are roughly the same and I’m not being uber spied on, don’t really care who has control of business manufacturing, no authoritarian country though.

Knowing Baidu, without the government requirement to censor, they’d become the new gøøgle in this hypothetical world, so you wouldn’t catch me directly using it. Don’t have enough info on harmony to make a statement about it since I usually just use budget samsun phones with their android tweaks. As for windows/Linux, there are already whole entire Linux distros (like Deepin) that may be forks of one of the big distros but are their own thing. But knowing me, I’d still stick with whatever Linux I am using at the time, so little to no impact for me there.

All in all, I don’t have a problem in this hypothetical. But that’s something we’re pretty far away from ever becoming a reality, though.