There is talk about China in the general thread, so I'll post my thoughts here.
You have 2 strategies for the UA's growth
a) grow like crazy
b) grow like normal, use the bonus food to work fewer food tiles, work more specialists/mines/whatever
The problem with a) is you need a religion, a very specific religion, but you have no bonus faith. You don't have other ancient era bonuses to indirectly get faith either. Its not just that you have to found a religion, you really need specific beliefs that are pretty popular with the AI (Cathedrals, Theocratic Rule). That means not taking other beliefs, like a more traditional tradition focus (Mastery, Ceremonial Burial, Mandate of Heaven)
The problem with b) is that others do it better. India does it much better, his high base food with a high multiplier seems to work much better than only the high multiplier. But its not just India, Inca and Aztec can compete (and both have a great shot at religion too!). Additionally their food stays steady, the constantly changing multipliers on China is tough to deal with. Food multipliers are additive, so having a 150% for golden age and love of empress is misleadingly large (it also dilutes your other bonuses for stuff like tradition, monopolies, happiness or rationalism).
The other thing is the great person synergy, which leans towards tradition. Tradition really has anti-synergy with the rest of our plan though, if we take mastery we can't take the growth beliefs we want, and the UA's food multiplier makes tradition's mostly insignificant. We also don't compete with other tradition lovers, like Arabia, in raw power. Korea is a civ that has many similarities with China, but side by side just looks a lot better. My experience with China as progress is you usually just fall flat on your face immediately, if you survive you can't really take advantage of golden ages or great person births for a long time. Authority works decently but doesn't play into your strengths at all.
The thing about WLTED synergy is if you play tall its not that difficult to get it all anyways, and there actually aren't that many places to grab synergy for it. If tradition your capital gets way too much WLTED while other cities don't get that much more than a normal civ.
I think the paper maker is among the worst UB. When you build it, its a library with +1 culture, at 12 pop it will have 1 science over the regular library. Eventually it starts to earn a pretty good chunk of science, but by that point other science UBs like the Skola or Seowon would be built and provide more than the paper maker does.
I constantly find myself wishing the ChuKoNu was available earlier. The unit itself is great and it would be a top tier UU if the rest of China could support it better. The thing I would change first is the UB, because its just weak. The UA isn't outright weak but its really difficult to use