lines 1 and 3.
According to the city guide website, Dongmen Laojie subway is called "Laojie Station", and Shenzhen Metro Line 1 and Line 3 can be reached. Take Metro Line 1 and Line 3 to Exit B of Laojie Station and walk to Dongmen Laojie.
Dongmen Old Street is the root of modern Shenzhen and the oldest commercial pedestrian street in Shenzhen.