Can I make multiple travels between Shenzhen and Hongkong

Hi,

I am planning to visit Shenzhen for a business trip. I also want to visit Hongkong on this trip. I am planning to land in HK from India and travel to Shenzhen in a car. On week end I want to visit HK and get back to Shenzhen. And I want to fly back to India from HK. What kind of Visas I need in HK and China for this and will I get them ? (I am first time visitor to China) Or do I need to make changes to my trip ?

Thanks
Srinivasa Yakkanti