This map shows that Shenzhen, a coastal city, is located in Southern China. Shenzhen is a bridge linking the Chinese mainland with Hong Kong.
Hi Toshi, please see below my answers to your questions:
1. Guangzhou, Guangdong to Hui Yang, Guangdong--about 180km, 2hr40mins
2. Hui Yang, Guangdong to Hengli Town, Dongnuan--about 90km, 1hr40mins
3. Hengli Town Dongguan to Shenzhen city--about 85km, 1hr35mins
4. Shengzhen city to Yan Luo industrial district, Ahao yang road, songgang bao''an,--about 40km, 50-60minsWhitney Liao replied on 2013-03-20