Subway restaurant, famous for it's delicious sandwitches, has two stores in Shenzhen at the moment, with a third under construction.  Sandwitches vary in price from 19 - 26Y (prices July 2008, Central Walk, Futian District).The staff speaks English, so it should be no problem to order your favorite sandwitch here.

Address Futian (the big Carrefour at Central Walk):

Yijing Central Walk, Futian Dt, L1004. No. 3 Fuhuayi Road Shenzhen GN 518026,

Phone: 0755-82801186

Address Shekou:

G6 Taizi Square, Taizi Road, Shekou Industrial Zone Shenzhen GU 518000

Phone: 0755-26889328  

Not open yet:

A2-04, Haide San Dao Shenzhen GN 518059