The best advice for going to the East Gate is to go to the Window of the World first. There are many bus routes, NNNN, as long as you stop at the north gate of Shenzhen University and then take the subway to the window of the world. Soon, it will take about 40 minutes.
Futian district is very talkative. I don't know what the hell you are talking about.
If you just come to Shenzhen, I suggest you buy a map. It's fast. You can buy it at the newsstand.