For information - The arrival hall at Hong Kong airport Stand OA7 has a visa office where you can renew your visa for Mainland China.
3 months visa cost 1000 HK Dollars about 80 GB Pounds, 130 US Dollars, 820 RMB.
The plus side is that you can collect the visa 5 hours later provided it was ordered before 11am.
This was done today by a Westerner who is visiting me later today. So is up to date info. So anyone flying into Hong Kong from Europe or North America without a visa can do same.
Willy