from guangzhou to shenzhen and HK by the high speed rail

1. I am staying at the fortune hotel on 603 tianhe road and planning to go to Shenzhen tomorrow morning. Which high speed rail station I should go to that is nearest to my hotel? If I go by taxi to the station, how much would it cost?
2. I want to go shopping in luohu mall. which station would be the nearest to get off in shenzhen and how would I reach the mall? how far is it from the station?