Redefining Lanzhou

Lanzhou University Science and Technology Plaza
兰大科技广场 (Lándà Kējì Guăngchăng)
Dōnggāng Xīlù & Tiānshuì Lù crossing
东岗西路天水路口
Map

Computers, software, MP3s, cameras etc (including authorised Apple resellers on the 2nd floor). 

Lanzhou Science & Technology Plaza (3F) 
兰州科技广场 (Lánzhōu Kējì Guăngchăng)
Nánguān Shízì (northwest corner)
南关什字 (西北角)
Map

Computers, software, MP3s, cameras etc (including authorised Apple resellers on the 2nd floor)

Electronics Trade City
电子商贸城 (Diànzĭ Shāngmào Chéng)
Dōnggăng Dōnglù 
东岗东路
Map

About 700m east of the Tiānshuì Lù crossing. DVD players, speakers etc, 2nd-hand minidisc players on the 2nd floor.

Guăngwŭ Mén, Jīnchāng Lù 
广武门，金昌路
Map

Walk north from the Square's Xīkŏu west gate (西口), and you'll come across a concentration of mobile phone shops, for an entire block. For SIM card contracts, go to the China Mobile on the NE corner of Xikou (map).