Epic trip mate, good luck. May sound too easy but approach the main Chinese Embassy nearest you with this, I suggest you do it fully in writing with details of your license and so on included and any references that may add weight. Offer to supply a bond in case of accident and details of Insurance etc, also point out your financial security and importantly point out your knowledge of road rules in China and mention you have contacts in China. I got that far before ill health stopped me and on the telephone I was assured there are ways it could be done and that I could get 'official' paperwork (with seals and chops lol) before the trip. Don't rely on forums to give that sort of information - many have knowledge that may well be true but things always change. You may not get the reply you wish for but you should get a reply and even if negative then you can negotiate.