Answered by Zac from Singapore | Jan. 26, 2016 21:20
Donald, visitors usually go to visit the sections in Beijing. It's about 820 miles (1318 kilometers) between Beijing and Shanghai if you take G trains, and 1500 miles (2400 kilometers) between BJ and Shenzhen by airconditioned train.
If it's your first time to visit the wall, then I think you might visit Badaling. The transportation is convenient. You can take bus no. 877 from Deshengmen to reach there.