That's one close vote. I don't think china is controlling bitcoin but they are running a stupid amount of trading bots. I'm pretty sure they ones really controlling bitcoin are from the USA.
China has big part in bitcoin community too since they are the one that hold most of the coin(thru mining) they can also manage to control it if they want. What they just need is a team work for each other.
you're right, I think china having an enormous mining for bitcoin, so they might be able to manipulate the price if they want to, but I guess it would not do, because most likely the income they get comes from bitcoin. but perhaps there had a very great mining and technology is good enough for bitcoin. because I heard that China is a country that has a large population, so many of them are unemployed, maybe with this they can make money with a good deal