The Shenzhen center point is about the area of Luohu Railway Station Luohu Custom and 2 miles southeast of Shenzhen Convention and Exhibition Center.
Below are reviews of the city of Shenzhen, China from an actual visitor's perspective.
I have been coming to Shenzhen for the last forty years, watching it grow from 100 thousand population to 20 million population. It is one of the better planned cities in China.