Originally Posted by CjTheFish

Just because it's .co.uk does not mean your traffic should all be UK. It's just a domain extension, anyone in the world can access it.

Has your China traffic been consistent over time or is it a recent spike? Sometimes one of my sites will have a page index and skyrocket to #1 in the China SE's like Baidu or Sogou, traffic spike for a day or two and then it completely disappears and gets removed. China bans porn so it's only a matter of time until your site gets taken off the China SE's.