Hi there,
I was wondering if the Hong Kong locals can give us some advice on traveling to Shenzhen after the conference this year, since it's so close to HK.
When I contacted the Chinese embassy in Serbia, they told me that I'd need a regular tourist visa for China (which is somewhat tedious to obtain) or, if I want to visit Shenzhen Special Economic Zone only, I can get a "group Shenzhen visa" (whatever that is).
However, About.com [1] says that for Shenzhen SEZ, one can just buy the visa at the border.