Guangzhou Visit Advice

I am visiting China (Shenzhen) on 25th September 2011 for 3-nights visit. From there I want Guangzhou. Is there any Package for Sight Seeing for Guangzhou from Shenzhen, so we can come with tourist bus as package-tour and go back Shenzhen on same day after Sight Seeing. How much it cost for 3-adult and 1-Child. If we take a Car from Shenzhen then also whether is it possible to finish all must seen places in Guangzhou ? Please advice..