Entry to Hong Kong for Indian Citizens having 90 days valid Chinese visa

Dear Sir,

I am an Indian citizen having Indian passport and residing in Dubai and have applied for 90 days visa to China for an official purpose. I have a query regarding the entry to China via Hong Kong with 90 days Chinese visa. I want to know whether i can take ticket to Hon Kong and travel to my destination i.e. Guang Dong on road. Is there any formalities that i have to clear on arriving on Hong Kong. And also if i can arrive in Hong Kong, how much days can i stay in Hong Kong.
Awaiting your valuable feedback.

With regards
Kevin Roy