Hello, i'm italian and i'm flying to hong kong and then i'll go to china. It's not my first time and usually i got my china visa at one travel agency in HK or at the china ambassy for about 180 HK$ 3 mounths validity. I read about a china visa available at the border (HK - Schenzen). I'm not talking about the Shenzen permit that is valid just in Shenzen area but a real china visa. Someone know if is it true and what's the validity and cost of this visa?