I should have stated at the outset, that because of the way that Christians acted in the 19th century, that there is a deep suspicion of Christianity in China. Most churches are controlled by a 'local' organisation which will have a government representative is some form.
Cant see the WTS/GB agreeing to that anytime soon. Further, the JW attitude to military service would be a major problem in China, as it is in Singapore, where the witnesses are also banned.