Is China trying to control Bitcoin?
I don't think China is trying to take control of the bitcoin network or the miners, China is probably just trying to either protect its currency form bitcoin or simply to try to stop money laundering in the country or maybe both.
The Chinese is Preventing the increase of the size of the block through the SegWit. Does it not relate to Chinese's interest? Because the party is trying to protect the economic from the money laundering is PBOC and not Chinese.